8GB (x72, ECC, DR) 240-Pin DDR3 VLP RDIMM
Pin Descriptions
Table 5: Pin Descriptions (Continued)
Symbol
Type
Description
SDA
I/O
Serial data: Used to transfer addresses and data into and out of the temperature sen-
sor/SPD EEPROM on the I2C bus.
TDQSx,
TDQSx#
Output
Redundant data strobe (x8 devices only): TDQS is enabled/disabled via the LOAD
MODE command to the extended mode register (EMR). When TDQS is enabled, DM is
disabled and TDQS and TDQS# provide termination resistance; otherwise, TDQS# are
no function.
Err_Out#
EVENT#
VDD
Output
(open drain)
Parity error output: Parity error found on the command and address bus.
Output
Temperature event:The EVENT# pin is asserted by the temperature sensor when criti-
(open drain) cal temperature thresholds have been exceeded.
Supply
Power supply: 1.5V ±0.075V. The component VDD and VDDQ are connected to the
module VDD
.
VDDSPD
VREFCA
VREFDQ
VSS
Supply
Supply
Supply
Supply
Supply
–
Temperature sensor/SPD EEPROM power supply: 3.0–3.6V.
Reference voltage: Control, command, and address VDD/2.
Reference voltage: DQ, DM VDD/2.
Ground.
VTT
Termination voltage: Used for control, command, and address VDD/2.
No connect: These pins are not connected on the module.
NC
NF
–
No function: These pins are connected within the module, but provide no functional-
ity.
PDF: 09005aef8482a8a7
jdf18c1gx72pdz.pdf – Rev. D 12/12 EN
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5
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