mt9jsf12872a Micron Semiconductor Products, mt9jsf12872a Datasheet - Page 8

• Manufacturer Part Number: mt9jsf12872a
• Description: 1gb X72, Ecc, Sr 240-pin Ddr3 Sdram Udimm
• Manufacturer: Micron Semiconductor Products

Serial Presence-Detect EEPROM Operation
PDF: 09005aef8300b5ee/Source: 09005aef8300b63a
JSF9C128x72A.fm - Rev. A 3/08 EN
DDR3 SDRAM modules incorporate serial presence-detect. The SPD data is stored in a
256-byte EEPROM. The first 128 bytes are programmed by Micron to comply with JEDEC
specification JC-45 “Appendix X: Serial Presence Detect (SPD) for DDR3 SDRAM
Modules” (pending approval). These bytes identify module-specific timing parameters,
configuration information, and physical attributes. User-specific information can be
written into the remaining 128 bytes of storage. System READ/WRITE operations
between the master (system logic) and the slave EEPROM device occur via a standard
I
which provide eight unique DIMM/EEPROM addresses. Write protect (WP) is connected
to V
2
C bus using the DIMM’s SCL (clock) and SDA (data) signals, together with SA[2:0],
SS
, permanently disabling hardware write protect.
1GB (x72, ECC, SR) 240-Pin DDR3 SDRAM UDIMM
8
Micron Technology, Inc., reserves the right to change products or specifications without notice.
General Description
©2008 Micron Technology, Inc. All rights reserved