Add SPD reader and traits DDR4 def

Includes addition of a generic const file to store
constants that are not controller dependent.
In addition to spd::c_str for SPD decoder tracing.

Change-Id: I6dafe1ff3328a1ac287b29f148e63e304f626ea5
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/57492
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/58197
Reviewed-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 3764 insertions, 0 deletions

diff --git a/src/import/generic/memory/lib/spd/spd_traits_ddr4.H b/src/import/generic/memory/lib/spd/spd_traits_ddr4.H
index ef6caf462..5d2323bba 100644
--- a/src/import/generic/memory/lib/spd/spd_traits_ddr4.H
+++ b/src/import/generic/memory/lib/spd/spd_traits_ddr4.H
@@ -22,3 +22,3767 @@
 /* permissions and limitations under the License.                         */
 /*                                                                        */
 /* IBM_PROLOG_END_TAG                                                     */
+
+///
+/// @file spd_traits_ddr4.H
+/// @brief Assocated traits for reading DDR4 SPD fields
+///
+
+// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
+// *HWP HWP Backup: Stephen Glancy <sglancy@us.ibm.com>
+// *HWP Team: Memory
+// *HWP Level: 2
+// *HWP Consumed by: HB:FSP
+
+#ifndef _MSS_SPD_TRAITS_DDR4_H_
+#define _MSS_SPD_TRAITS_DDR4_H_
+
+#include <cstdint>
+#include <generic/memory/lib/spd/spd_fields_ddr4.H>
+#include <generic/memory/lib/spd/spd_traits.H>
+
+namespace mss
+{
+namespace spd
+{
+
+// Note: The 3rd template parameter is a compile-time conditional
+// to activate trait class based on a valid SPD revision.
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BYTES_USED field partial specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template<rev R>
+class readerTraits < fields<DDR4, BASE_CNFG>::BYTES_USED, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b0100; ///< Largest valid SPD encoding
+        static constexpr const char* FIELD_STR = "SPD Bytes Used";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TOTAL_BYTES field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template<rev R>
+class readerTraits < fields<DDR4, BASE_CNFG>::TOTAL_BYTES, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b010; ///< Largest valid SPD encoding
+        static constexpr const char* FIELD_STR = "SPD Bytes Total";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REVISION field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::REVISION, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Encoding Level";
+
+        template <typename T>
+        using COMPARISON_OP = std::less<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DEVICE_TYPE field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::DEVICE_TYPE, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xC; ///< Largest valid SPD encoding
+        static constexpr const char* FIELD_STR = "DRAM Device Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DEVICE_TYPE field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::DEVICE_TYPE, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x11; ///< Largest valid SPD encoding
+        static constexpr const char* FIELD_STR = "DRAM Device Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BASE_MODULE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::BASE_MODULE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1101;
+        static constexpr const char* FIELD_STR = "Base Module";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note HYBRID field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::HYBRID, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Hybrid";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note HYBRID field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::HYBRID, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x1;
+        static constexpr const char* FIELD_STR = "Hybrid";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note HYBRID_MEDIA field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::HYBRID_MEDIA, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Hybrid Media";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note HYBRID_MEDIA field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::HYBRID_MEDIA, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x1;
+        static constexpr const char* FIELD_STR = "Hybrid Media";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BANK_GROUP_BITS field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::BANK_GROUP_BITS, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Bank Group";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BANKS_ADDR_BITS field specialization
+/// @note rev 1.0 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::BANKS_ADDR_BITS, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "Bank Address Bits";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SDRAM_CAPACITY field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::SDRAM_CAPACITY, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b0111;
+        static constexpr const char* FIELD_STR = "SDRAM capacity";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SDRAM_CAPACITY, field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SDRAM_CAPACITY, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1001;
+        static constexpr const char* FIELD_STR = "SDRAM Capacity";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note COL_ADDR_BITS field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::COL_ADDR_BITS, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b011;
+        static constexpr const char* FIELD_STR = "Column Address Bits";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ROW_ADDR_BITS field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::ROW_ADDR_BITS, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110;
+        static constexpr const char* FIELD_STR = "Row Address Bits";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note PRIM_SIGNAL_LOADING field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::PRIM_SIGNAL_LOADING, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Primary Signal Loading";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note PRIM_DIE_COUNT field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::PRIM_DIE_COUNT, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Primary Die Count";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note PRIM_PACKAGE_TYPE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::PRIM_PACKAGE_TYPE, R,
+          std::integral_constant<bool, (R >= rev::V1_0)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Primary Package Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MAC field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MAC, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1000;
+        static constexpr const char* FIELD_STR = "Maximum Activate Count (MAC)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TMAW field specialization
+/// @note rev 1.0 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::TMAW, R,
+          std::integral_constant<bool, (R >= rev::V1_0)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Maximum Activate Window (TMAW)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note PPR field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::PPR, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "Post package repair (PPR)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SOFT_PPR field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::SOFT_PPR, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Soft post package repair (SPPR)";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SOFT_PPR field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SOFT_PPR, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "Soft post package repair (SPPR)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_SIGNAL_LOADING field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_SIGNAL_LOADING, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Secondary Signal Loading";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_SIGNAL_LOADING field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_SIGNAL_LOADING, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Secondary Signal Loading";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_DENSITY_RATIO field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_DENSITY_RATIO, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Secondary DRAM density ratio";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_DENSITY_RATIO field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_DENSITY_RATIO, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Secondary DRAM density ratio";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_DIE_COUNT field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_DIE_COUNT, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Secondary Die Count";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_DIE_COUNT field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_DIE_COUNT, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Secondary Die Count";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_PACKAGE_TYPE field specialization
+/// @note rev 1.0 specialization
+///
+template< >
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_PACKAGE_TYPE, V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Secondary Package Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note SEC_PACKAGE_TYPE field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::SEC_PACKAGE_TYPE, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Secondary Package Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OPERABLE_FLD field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OPERABLE_FLD, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Operable nominal voltage";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ENDURANT_FLD field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::ENDURANT_FLD, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Endurant nominal voltage";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note SDRAM_WIDTH field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::SDRAM_WIDTH, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b011;
+        static constexpr const char* FIELD_STR = "Device Width";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note PACKAGE_RANKS field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::PACKAGE_RANKS, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Package Ranks per DIMM";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note PACKAGE_RANKS field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::PACKAGE_RANKS, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Package Ranks per DIMM";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note RANK_MIX field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::RANK_MIX, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Rank Mix";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note RANK_MIX field specialization
+/// @note rev 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::RANK_MIX, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Rank Mix";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BUS_WIDTH field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::BUS_WIDTH, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b011;
+        static constexpr const char* FIELD_STR = "Primary Bus Width";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BUS_EXT_WIDTH field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::BUS_EXT_WIDTH, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b001;
+        static constexpr const char* FIELD_STR = "Bus Width Extension (bits)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note THERM_SENSOR field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::THERM_SENSOR, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Thermal Sensor";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note EXTENDED_MODULE_TYPE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::EXTENDED_MODULE_TYPE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Extended Base Module Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MED_TIMEBASE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MEDIUM_TIMEBASE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Medium Timebase";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note FINE_TIMEBASE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::FINE_TIMEBASE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Fine Timebase";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TCK_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TCK_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "tCKmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TCK_MAX field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TCK_MAX, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "tCKmax in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CL_FIRST_BYTE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::CL_FIRST_BYTE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - First byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CL_SECOND_BYTE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::CL_SECOND_BYTE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - Second byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CL_THIRD_BYTE field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::CL_THIRD_BYTE, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x03;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - Third byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CL_THIRD_BYTE field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::CL_THIRD_BYTE, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - Third byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CL_FOURTH_BYTE field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, BASE_CNFG>::CL_FOURTH_BYTE, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - Fourth byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CL_FOURTH_BYTE field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, BASE_CNFG>::CL_FOURTH_BYTE, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xBF;
+        static constexpr const char* FIELD_STR = "CAS latencies supported - Fourth byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TAA_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TAA_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tAAmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRCD_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRCD_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRCDmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRP_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRP_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRPmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRASMIN_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRASMIN_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRASmin (most significant nibble) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRASMIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRASMIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRASmin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRCMIN_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRCMIN_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRCmin (most significant nibble) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRCMIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRCmin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC1MIN_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC1MIN_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC1min (most significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC1MIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC1MIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC1min (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC2MIN_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC2MIN_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC2min (most significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC2MIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC2MIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC2min (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC4MIN_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC4MIN_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC4min (most significant byte) in MTB";
+
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRFC4MIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRFC4MIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRFC4min (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TFAWMIN_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TFAWMIN_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "Minimum Four Activate Window Delay Time (tFAWmin) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TFAWMIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TFAWMIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "Minimum Four Activate Window Delay Time (tFAWmin) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRRD_S_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRRD_S_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRRD_Smin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TRRD_L_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TRRD_L_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tRRD_Lmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TCCD_L_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TCCD_L_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tCCD_Lmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater<T>;
+
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWRMIN_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWRMIN_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWRmin (most significant nibble) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWRMIN_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWRMIN_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWRmin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWTRMIN_S_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWTRMIN_S_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWTR_Smin (most significant nibble) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWTRMIN_S_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWTRMIN_S_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWTR_Smin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWTRMIN_L_MSN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWTRMIN_L_MSN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWTR_Lmin (most significant nibble) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note TWTRMIN_L_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::TWTRMIN_L_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "tWTR_Lmin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TCCD_L_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TCCD_L_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+
+        static constexpr const char* FIELD_STR = "Fine Offset tCCD_Lmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TRRD_L_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TRRD_L_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+
+        static constexpr const char* FIELD_STR = "Fine Offset for tRRD_Lmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TRRD_S_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TRRD_S_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+
+        static constexpr const char* FIELD_STR = "Fine Offset for tRRD_Smin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TRC_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TRC_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Fine Offset for tRCmin (least significant byte) in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TRP_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TRP_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+
+        static constexpr const char* FIELD_STR = "Fine Offset for tRPmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TAA_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TAA_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Fine Offset for tAAmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TRCD_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TRCD_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Fine Offset for tRCDmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TCK_MIN field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TCK_MIN, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Fine Offset for tCKmin in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note OFFSET_TCK_MAX field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::OFFSET_TCK_MAX, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Fine Offset for tCKmax in MTB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CRC_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::CRC_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "CRC (most significant byte) for base config";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CRC_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::CRC_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "CRC (least significant byte) for base config";
+
+        template <typename T>
+        using COMPARISON_OP = std::greater_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CONTINUATION_CODES field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::CONTINUATION_CODES, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x89;
+        static constexpr const char* FIELD_STR = "Number of continuation codes, module manufacturer";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note LAST_NON_ZERO_BYTE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::LAST_NON_ZERO_BYTE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Last non-zero byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_MFG_LOCATION field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_MFG_LOCATION, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Manufacturing Location";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_MFG_DATE_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_MFG_DATE_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Odd parity for num of continuation codes, module manufacturer";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_MFG_DATE_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_MFG_DATE_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Odd parity for num of continuation codes, module manufacturer";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_SERIAL_NUM_BYTE1 field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_SERIAL_NUM_BYTE1, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Serial Number byte 1";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_SERIAL_NUM_BYTE2 field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_SERIAL_NUM_BYTE2, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Serial Number byte 2";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_SERIAL_NUM_BYTE3 field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_SERIAL_NUM_BYTE3, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Serial Number byte 3";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_SERIAL_NUM_BYTE4 field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_SERIAL_NUM_BYTE4, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Serial Number byte 4";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_REV_CODE field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::MODULE_REV_CODE, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Module Revision Code";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_MFR_ID_CODE_LSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::DRAM_MFR_ID_CODE_LSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x89;
+        static constexpr const char* FIELD_STR = "DRAM manufacturer ID code, LSB";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_MFR_ID_CODE_MSB field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::DRAM_MFR_ID_CODE_MSB, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x00;
+        static constexpr const char* FIELD_STR = "DRAM manufacturer ID code, MSB";
+
+        template <typename T>
+        using COMPARISON_OP = std::not_equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_STEPPING field specialization
+/// @note valid for revisions up to rev::GEN_SEC_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, BASE_CNFG>::DRAM_STEPPING, R,
+          std::integral_constant<bool, (R <= rev::GEN_SEC_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "DRAM stepping";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_NOMINAL_HEIGHT field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::MODULE_NOMINAL_HEIGHT, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11111;
+
+        static constexpr const char* FIELD_STR = "Module Nominal Height";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note FRONT_MODULE_THICKNESS field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::FRONT_MODULE_THICKNESS, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+
+        static constexpr const char* FIELD_STR = "Front Module Max Thickness";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BACK_MODULE_THICKNESS field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::BACK_MODULE_THICKNESS, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+        static constexpr const char* FIELD_STR = "Back Module Max Thickness";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REF_RAW_CARD field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::REF_RAW_CARD, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Reference Raw Card";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note NUM_REGS_USED field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::NUM_REGS_USED, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Number of registers used";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ROWS_OF_DRAMS field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::ROWS_OF_DRAMS, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Number of rows of DRAMs";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REGISTER_TYPE field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::REGISTER_TYPE, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b0001;
+        static constexpr const char* FIELD_STR = "Register Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note HEAT_SPREADER_CHAR field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::HEAT_SPREADER_CHAR, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Heat spreader thermal characteristics";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note HEAT_SPREADER_SOL field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::HEAT_SPREADER_SOL, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Heat spreader solution";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CONTINUATION_CODES field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::CONTINUATION_CODES, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x89; // JEP106AS
+        static constexpr const char* FIELD_STR = "Number of continuation codes";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note LAST_NON_ZERO_BYTE field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::LAST_NON_ZERO_BYTE, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Last non-zero byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REGISTER_REV field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::REGISTER_REV, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Register revision number";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ADDR_MAP_REG_TO_DRAM field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::ADDR_MAP_REG_TO_DRAM, R,
+
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Address mapping from register to DRAM";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CKE_DRIVER field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template<>
+class readerTraits< fields<DDR4, RDIMM_MODULE>::CKE_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for CKE";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CKE_DRIVER field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::CKE_DRIVER, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for CKE";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note ODT_DRIVER field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template<>
+class readerTraits< fields<DDR4, RDIMM_MODULE>::ODT_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for ODT";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note ODT_DRIVER field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::ODT_DRIVER, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for ODT";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CA_DRIVER field specialization
+/// @note valid for revisions up to rev::RDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, RDIMM_MODULE>::CA_DRIVER, R,
+          std::integral_constant<bool, (R <= rev::RDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for command/address (CA)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CS_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, RDIMM_MODULE>::CS_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for Chip Select (CS)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CS_DRIVER field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, RDIMM_MODULE>::CS_DRIVER, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for Chip Select (CS)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note YO_Y2_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, RDIMM_MODULE>::YO_Y2_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y0,Y2)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note YO_Y2_DRIVER field specialization
+/// @note rev 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, RDIMM_MODULE>::YO_Y2_DRIVER, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y0,Y2)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note Y1_Y3_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, RDIMM_MODULE>::Y1_Y3_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y1,Y3)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note Y1_Y3_DRIVER field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, RDIMM_MODULE>::Y1_Y3_DRIVER, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y1,Y3)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note MODULE_NOMINAL_HEIGHT field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::MODULE_NOMINAL_HEIGHT, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11111;
+        static constexpr const char* FIELD_STR = "Module Nominal Height";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note RAW_CARD_EXT field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::RAW_CARD_EXT, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Raw Card Extension";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note FRONT_MODULE_THICKNESS field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::FRONT_MODULE_THICKNESS, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+        static constexpr const char* FIELD_STR = "Front Module Max Thickness";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note BACK_MODULE_THICKNESS field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::BACK_MODULE_THICKNESS, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+        static constexpr const char* FIELD_STR = "Back Module Max Thickness";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REF_RAW_CARD field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::REF_RAW_CARD, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Reference Raw Card";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note NUM_REGS_USED field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::NUM_REGS_USED, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "Number of registers used";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ROWS_OF_DRAMS field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::ROWS_OF_DRAMS, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Number of rows of DRAMs";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REGISTER_TYPE field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::REGISTER_TYPE, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b0001;
+        static constexpr const char* FIELD_STR = "Register Type";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note HEAT_SPREADER_SOL field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::HEAT_SPREADER_SOL, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Heat spreader solution";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CONTINUATION_CODES field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::CONTINUATION_CODES, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0x89; // JEP106AS
+        static constexpr const char* FIELD_STR = "Number of continuation codes";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note LAST_NON_ZERO_BYTE field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::LAST_NON_ZERO_BYTE, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Last non-zero byte";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note REGISTER_REV field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::REGISTER_REV, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Register revision number";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note ADDR_MAP_REG_TO_DRAM field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::ADDR_MAP_REG_TO_DRAM, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Address mapping from register to DRAM";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CKE_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::CKE_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+
+        static constexpr const char* FIELD_STR = "Register Output Driver for CKE";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CKE_DRIVER field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::CKE_DRIVER, R,
+          std::integral_constant<bool, R >= rev::V1_1 > >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for CKE";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note ODT_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::ODT_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for ODT";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note ODT_DRIVER field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::ODT_DRIVER, R,
+          std::integral_constant<bool, R >= rev::V1_1 > >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for ODT";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note CA_DRIVER field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::CA_DRIVER, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for command/address (CA)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CS_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::CS_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for Chip Select (CS)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note CS_DRIVER field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::CS_DRIVER, R,
+          std::integral_constant<bool, R >= rev::V1_1 > >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+
+        static constexpr const char* FIELD_STR = "Register Output Driver for Chip Select (CS)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note YO_Y2_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::YO_Y2_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y0,Y2)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note YO_Y2_DRIVER field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::YO_Y2_DRIVER, R,
+          std::integral_constant<bool, R >= rev::V1_1> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y0,Y2)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note Y1_Y3_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::Y1_Y3_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b10;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y1,Y3)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note Y1_Y3_DRIVER field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::Y1_Y3_DRIVER, R,
+          std::integral_constant<bool, R >= rev::V1_1> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b11;
+        static constexpr const char* FIELD_STR = "Register Output Driver for clock (Y1,Y3)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note BCOM_BODT_BCKE_DRIVER, field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::BCOM_BODT_BCKE_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Register Output Driver for data buffer control (BCOM, BODT, BCKE)";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note BCOM_BODT_BCKE_DRIVER, field specialization
+/// @note valid for rev >= 1.1 specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::BCOM_BODT_BCKE_DRIVER, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 1;
+        static constexpr const char* FIELD_STR = "Register Output Driver for data buffer control (BCOM, BODT, BCKE)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note BCK_DRIVER field specialization
+/// @note rev 1.0 specialization
+///
+template<>
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::BCK_DRIVER, rev::V1_0 >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Register Output Driver for data buffer control (BCK)";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note BCK_DRIVER field specialization
+/// @note valid for rev >= 1.1
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::BCK_DRIVER, R,
+          std::integral_constant<bool, (R >= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 1;
+        static constexpr const char* FIELD_STR = "Register Output Driver for data buffer control (BCK)";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note RCD_SLEW_CNTRL field specialization
+/// @note rev 1.0 & 1.1 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::RCD_SLEW_CNTRL, R,
+          std::integral_constant<bool, (R <= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "RCD output slew rate control";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note RCD_SLEW_CNTRL field specialization
+/// @note valid for rev >= 1.2
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::RCD_SLEW_CNTRL, R,
+          std::integral_constant<bool, (R >= rev::V1_2)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 1;
+        static constexpr const char* FIELD_STR = "RCD output slew rate control";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DATA_BUFFER_REV field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_REV, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0xFF;
+        static constexpr const char* FIELD_STR = "Data buffer revision";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note VREF_DQ_RANK0 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::VREF_DQ_RANK0, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110010;
+        static constexpr const char* FIELD_STR = "DRAM VrefDQ for Package Rank 0";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note VREF_DQ_RANK1 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::VREF_DQ_RANK1, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110010;
+        static constexpr const char* FIELD_STR = "DRAM VrefDQ for Package Rank 1";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note VREF_DQ_RANK2 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::VREF_DQ_RANK2, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110010;
+        static constexpr const char* FIELD_STR = "DRAM VrefDQ for Package Rank 2";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note VREF_DQ_RANK3 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::VREF_DQ_RANK3, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110010;
+        static constexpr const char* FIELD_STR = "DRAM VrefDQ for Package Rank 3";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DATA_BUFFER_VREF_DQ field specialization
+/// @note rev 1.0 specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_VREF_DQ, R,
+
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b110010;
+        static constexpr const char* FIELD_STR = "Data Buffer VrefDQ for DRAM Interface";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ Drive Strength for data rate <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ Drive Strength for 1866 < data rate <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ Drive Strength for 2400 < data rate <=3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_RTT_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_RTT_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ RTT for data rate <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_RTT_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_RTT_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ RTT for 1866 < data rate <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DB_MDQ_RTT_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DB_MDQ_RTT_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "Data Buffer MDQ RTT for 2400 < data rate <=3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_DRIVE_STRENGTH_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_DRIVE_STRENGTH_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM Drive Strength for data rates <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_DRIVE_STRENGTH_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_DRIVE_STRENGTH_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM Drive Strength for 1866 < data rates <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_DRIVE_STRENGTH_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_DRIVE_STRENGTH_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM Drive Strength for 2400 < data rates <= 3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_NOM_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_NOM_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_NOM for data rates <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_NOM_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_NOM_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_NOM for 1866 < data rates <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_NOM_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_NOM_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b111;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_NOM for 2400 < data rates <= 3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_WR_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_WR_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b100;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_WR for data rates <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_WR_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_WR_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b100;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_WR for 1866 < data rates <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_WR_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_WR_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b100;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_WR for 2400 < data rates <= 3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R01_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R01_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 0, 1 for data rates <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R01_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R01_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 0, 1 for 1866 < data rates <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R01_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R01_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 0, 1 for 2400 < data rates <= 3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R23_LTE_1866 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R23_LTE_1866, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 2, 3 for data rates <= 1866";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R23_LTE_2400 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R23_LTE_2400, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 2, 3 for 1866 < data rates <= 2400";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @tparam R the revision of the SPD field
+/// @note DRAM_ODT_RTT_PARK_R23_LTE_3200 field specialization
+/// @note valid for revisions up to rev::LRDIMM_MAX (largest decoded rev)
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_ODT_RTT_PARK_R23_LTE_3200, R,
+          std::integral_constant<bool, (R <= rev::LRDIMM_MAX)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "DRAM ODT RTT_PARK, package rank 2, 3 for 2400 < data rates <= 3200";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DRAM_VREF_DQ_RANGE field specialization
+/// @note rev 1.0 & 1.1 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DRAM_VREF_DQ_RANGE, R,
+          std::integral_constant<bool, (R <= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+        static constexpr const char* FIELD_STR = "VrefDQ range for DRAM interface range";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DRAM_VREF_DQ_RANGE field specialization
+/// @note rev 1.2+ specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::DRAM_VREF_DQ_RANGE, R,
+          std::integral_constant<bool, (R >= rev::V1_2)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1111;
+        static constexpr const char* FIELD_STR = "VrefDQ range for DRAM interface range";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_VREF_DQ field specialization
+/// @note rev 1.0 & 1.1 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_VREF_DQ_RANGE, R,
+          std::integral_constant<bool, (R <= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Data Buffer VrefDQ range for DRAM interface range";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_VREF_DQ field specialization
+/// @note rev 1.2+ specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_VREF_DQ_RANGE, R,
+          std::integral_constant<bool, (R >= rev::V1_2)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b1;
+        static constexpr const char* FIELD_STR = "Data Buffer VrefDQ range for DRAM interface range";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_DFE field specialization
+/// @note rev 1.0 & 1.1 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_DFE, R,
+          std::integral_constant<bool, (R <= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0;
+        static constexpr const char* FIELD_STR = "Data Buffer DFE";
+
+        template <typename T>
+        using COMPARISON_OP = std::equal_to<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_DFE field specialization
+/// @note rev 1.2+ specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_DFE, R,
+          std::integral_constant<bool, (R >= rev::V1_2)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 0b01;
+        static constexpr const char* FIELD_STR = "Data Buffer DFE";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_GAIN_ADJUST field specialization
+/// @note rev 1.0 & 1.1 specialization
+///
+template< rev R >
+class readerTraits < fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_GAIN_ADJUST, R,
+          std::integral_constant<bool, (R <= rev::V1_1)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 1;
+        static constexpr const char* FIELD_STR = "Data Buffer Gain Adjust";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+///
+/// @class readerTraits
+/// @brief trait structure to hold static SPD information
+/// @note DATA_BUFFER_GAIN_ADJUST field specialization
+/// @note rev 1.2+ specialization
+///
+template< rev R >
+class readerTraits< fields<DDR4, LRDIMM_MODULE>::DATA_BUFFER_GAIN_ADJUST, R,
+          std::integral_constant<bool, (R >= rev::V1_2)> >
+{
+    public:
+
+        static constexpr size_t COMPARISON_VAL = 1;
+        static constexpr const char* FIELD_STR = "Data Buffer Gain Adjust";
+
+        template <typename T>
+        using COMPARISON_OP = std::less_equal<T>;
+};
+
+}// spd
+}// mss
+
+#endif //_MSS_SPD_TRAITS_DDR4_H_