Temperature Sensor with Serial Presence-Detect EEPROM
Thermal Sensor Operations
The temperature from the integrated thermal sensor is monitored and converts into a
digital word via the I
2
C bus. System designers can use the user-programmable registers
to create a custom temperature-sensing solution based on system requirements. Pro-
gramming and configuration details comply with JEDEC standard No. 21-C page 4.7-1,
"Definition of the TSE2002av, Serial Presence Detect with Temperature Sensor."
Serial Presence-Detect EEPROM Operation
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 JE-
DEC standard JC-45, "Appendix X: Serial Presence Detect (SPD) for DDR3 SDRAM
Modules." These bytes identify module-specific timing parameters, configuration infor-
mation, and physical attributes. The remaining 128 bytes of storage are available for use
by the customer. System READ/WRITE operations between the master (system logic)
and the slave EEPROM device occur via a standard I
2
C bus using the DIMM’s SCL
(clock) SDA (data), and SA (address) pins. Write protect (WP) is connected to V
SS
, perma-
nently disabling hardware write protection. For further information refer to Micron
technical note TN-04-42, "Memory Module Serial Presence-Detect."
2GB, 4GB (x72, ECC, SR) 240-Pin DDR3 SDRAM RDIMM
Temperature Sensor with Serial Presence-Detect EEPROM
PDF: 09005aef8394fb39
js-z-f18c256_512x72pz.pdf - Rev. E 9/10 EN
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