SPD or Serial Presence Detect EEPROM is the area where details and characteristics of memory module (DIMMs) is written. This EEPROM in the contains timing parameters, manufacturer, serial number and other useful
information about the module. This data allows a device utilizing the
memory to automatically determine key parameters of the module.
The SPD EEPROM is accessed through SMbus ,a variant of I2C. Apart from this, it has separate power pins and three address selection bits (SA0-2), using which a unique address in the range 0x50–0x57 can be assigned to the EEPROM.
For more information, see :
http://en.wikipedia.org/wiki/Serial_presence_detect
The SPD EEPROM is accessed through SMbus ,a variant of I2C. Apart from this, it has separate power pins and three address selection bits (SA0-2), using which a unique address in the range 0x50–0x57 can be assigned to the EEPROM.
For more information, see :
http://en.wikipedia.org/wiki/Serial_presence_detect
