SPD

DDR5 SERIAL PRESENCE DETECT (SPD) CONTENTS

JESD400-5C

This standard describes the serial presence detect (SPD) values for all DDR5 memory modules. In this context, “modules” applies to memory modules like traditional Dual In-line Memory Modules (DIMMs) or solder-down motherboard applications. The SPD data provides critical information about all modules on the memory channel and is intended to be use by the system's BIOS in order to properly initialize and optimize the system memory channels.

Committee(s): JC-45

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SPD Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules, Release 6

SPD4.1.2.L-6

This annex describes the serial presence detect (SPD) values for all DDR4 modules covered in Document Release 6. 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’. Item 2220.01H.

Committee(s): JC-45

JESD21-C Solid State Memory Documents Main Page

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