registers can be read by software from the SMBus host any time the memory buffer is
powered, except when the memory buffer is in clock-stopped power-down mode, or
when the device RESET# pin is asserted.
Temperature Sensor
The memory buffer contains a class-C temperature sensor that can be configured to as-
sert the EVENT# pin when temperature thresholds are exceeded. The temperature sen-
sor is accessible through the SMBus.
Parity Operations
The memory buffer can accept a parity bit from the system’s memory controller, pro-
viding even parity for the control, command, and address bus. Parity is calculated from
all command and address signals (CKE, ODT, and S# are not included in parity). The last
bit of the sum is compared to the parity signal provided by the system at the Par_In pin.
Parity errors are flagged on the Err_Out# pin. Parity is also checked during control-word
programming.
Serial Presence-Detect EEPROM 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
JEDEC 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. User-specific information can be written into the re-
maining 128 bytes of storage. READ/WRITE operations between the system (master)
and the EEPROM (slave) device occur via the SMBus. Write-protect (WP) is connected
to V
SS
, permanently disabling hardware write-protect. For further information please
refer to Micron technical note TN-04-42, "Memory Module Serial Presence-Detect."
Temperature Sensor
A class-B temperature sensor is integrated with the SPD EEPROM component on the
module. The sensor temperature is monitored and converted into a digital word via the
SMBus. System designers can use the user-programmable registers to create a custom
temperature-sensing solution based on system requirements. Programming and config-
uration details comply with JEDEC standard No. 21-C page 4.7-1, “Definition of the
TSE2002av, Serial Presence Detect with Temperature Sensor.”
16GB (x72, ECC, QR x8) 240-Pin DDR3L LRDIMM
General Description
PDF: 09005aef846600e0
kszf36c2gx72ldz.pdf - Rev. F 9/15 EN
13
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2011 Micron Technology, Inc. All rights reserved.
