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JEDEC updates DDR3 SPD specification

Posted on Thursday, September 01 2011 @ 20:08:12 CEST by


JEDEC announced release 4 of the DDR3 Serial Presence Detect (SPD) specification:
JEDEC Solid State Technology Association, the global leader in standards development for the microelectronics industry, today announced the publication of Release 4 of the DDR3 Serial Presence Detect (SPD) document. The updated specifications, SPD4_01_02_11, Release No. 21A. SPD Annex K - Serial Presence Detect (SPD) for DDR3 SDRAM Modules, document support for three new memory module types, and are now available for free download on the JEDEC website at: http://www.jedec.org/sites/default/files/docs/4_01_02_11R21A.pdf.

“Application specific memory modules are widening the variety of options for system designers, and the Serial Presence Detect is a reliable and consistent way to document the features of these new modules so that system software can tune system performance,” said Mian Quddus, Chairman of JEDEC’s JC-45 Committee for Dynamic Random Access Memory (DRAM) Modules. He added, “This release of the DDR3 SPD specification adds support for Load Reduction DIMMs used in high end computing platforms and also for 16b-SO-DIMMs and 32b-SO-DIMMs used for embedded applications such as printers.”

JEDEC’s JC-45 Committee for Memory Modules developed the SPD specification in conjunction with the development of the new module types with the objective of enabling performance optimizations based on the characteristics of the DDR3 memories used on each module. SPDs are present on all JEDEC DRAM modules. Parameters such as storage capacity, speed, voltages supported, and the presence of thermal sensors allow systems to configure systems dynamically by reading the SPD on each module at initialization time.

Modules using the new parameters in DDR3 SPD document release 4 will be released by manufacturers in the next year.




 



 

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