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EDK II DEC File Specification

EDK II C coding standards specification

EDK II INF File Specification

This annex describes the serial presence detect (SPD) values for all DDR5 memory modules. To allow for maximum flexibility as devices evolve, SPD fields described in this document may support device configuration and timing options that are not included in the JEDEC DDR5 SDRAM data sheet (JESD79-5). Please refer to DRAM supplier data sheets or JESD79-5 to determine the compatibility of components.

This annex describes the serial presence detect (SPD) values for all DDR4 modules. Differences between module types are encapsulated in subsections of this annex. These presence detect values are those referenced in the SPD standard document for ‘Specific Features’. The following SPD fields will be documented in the order presented in section 1.1 with the exception of bytes 128~255 which are documented in separate annexes, one for each family of module types. Further description of Byte 2 is found in Annex A of the SPD standard.