Corsair 512 MB DDR2 Server Memory Module CM72DD512AR-400/S Manual De Usuario

73, 74, 192

RAS#, CAS#, 
WE#

Input

Command Inputs: RAS#, CAS#, and WE# (along with S#) define the 
command being entered.

71, 190

BA0, BA1

Input

Bank Address Inputs: BA0 and BA1 define to which device bank an 
ACTIVE, READ, WRITE, or PRECHARGE command is being applied. BA0 
and BA1 define which mode register including MR, EMR, EMR(2), and 
EMR(3) is loaded during the LOAD MODE command.

57, 58, 60, 61, 63, 70, 176, 
177, 179, 180, 182, 183, 
188, 196

A0-A12
(512MB), A0-
A13 (1GB)

Input

Address Inputs: Provide the row address for ACTIVE commands, and 
the column address and auto precharge bit (A10) for Read/Write 
commands, to select one location out of the memory array in the 
respective bank. A10 sampled during a PRECHARGE command 
determines whether the PRECHARGE applies to one device bank (A10 
LOW, device bank selected by BA0, BA1) or all device banks (A10 
HIGH). The address inputs also provide the opcode during a LOAD 
MODE command.

3, 4, 9, 10, 12, 13, 21, 22, 24,
25, 30, 31, 33, 34, 39, 40, 
80, 81, 86, 87, 89, 90, 95, 
96, 98, 99, 107, 108, 110, 
111, 116, 117, 122, 123, 
128, 129, 131, 132, 140, 
141, 143, 144, 149, 150, 
152, 153, 158, 159, 199, 
200, 205, 206, 208, 209, 
214, 215, 217, 218, 226, 
227, 229, 230, 235, 236

DQ0-DQ63

I/O

Data Input/Output: Bidirectional data bus.

6, 7, 15, 16, 27, 28, 36, 37, 
45, 46, 83, 84, 92, 93, 104, 
105, 113, 114, 125, 126, 
134, 135, 146, 147, 155, 
156, 164, 165, 202, 203, 
211, 212, 223, 224, 232, 
233

DQS0-
DQS17,
DQS0#-
DQS17#

I/O

Data Strobe: Output with read data, input with write data for sourece 
synchronous operation. Edge-aligned with read data, center aligned 
with write data. DQS# is only used when differential data strobe mode 
is enabled via the LOAD MODE command.

42, 43, 48, 49, 161, 162, 
167, 168

CB0-CB7

I/O

Check Bits: ECC, 1-bit error detection and correction. 

120

SCL

Input

Serial Clock for Presence-Detect: SCL is used to synchronize the 
presence-detect device. 

101, 239, 240

SA0-SA2

Input

Presence-Detect Address Inputs: These pins are used to configure the 
presence-detect device.

119

SDA

Input/Outpu
t

Serial Presence-Detect Data: SDA is a bidirectional pin used to transfer 
addresses and data into and out of the presence-detect portion of the 
module.

18

RESET#

Input

Asynchronously forces all registered outputs LOW when RESET# is 
LOW. This signal can be used during power up to ensure that CKE is 
LOW and DQs are High-Z.

53, 59, 64, 67, 69, 172, 178, 
184, 187, 189, 197

VDD

Supply

Power Supply: 1.8V +/-0.1V

51, 56, 62, 72, 75, 78, 170, 
175, 181, 191, 194

VDDQ

Supply

DQ Power Supply: 1.8V +/-0.1V. Isolated on the device for improved 
noise immunity.

1

VREF

Supply

SSTL_18 reference voltage.

2, 5, 8, 11, 14, 17, 20, 23, 26,
29, 32, 35, 38, 41, 44, 47, 
50, 65, 66, 79, 82, 85, 88, 
91, 94, 97, 100, 103, 106, 
109, 112, 115, 118, 121, 
124, 127, 130, 133, 136, 
139, 142, 145, 148, 151, 
154, 157, 160, 163, 166, 
169, 198, 201, 204, 207, 
210, 213, 216, 219, 222, 
225, 228, 231, 234, 237

VSS

Supply

Ground.

238

VDDSPD

Supply

Serial EEPROM positive power supply: +1.7V to +3.6V.

19, 54 (512MB, 1GB), 55, 
68, 76, 77, 102, 171, 196 
(512MB), 173, 174

NC

-

No Connect: These pins should be left unconnected. 

137, 138, 220, 221

RFU

-

Reserved for Future Use

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