MT16VDDF12864HG-40B Ver la hoja de datos (PDF) - Micron Technology

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MT16VDDF12864HG-40B

DDR SDRAM SODIMM

Micron Technology 

512MB, 1GB (x64, DR) 200-Pin DDR SODIMM

Pin Assignments and Descriptions

Table 6: Pin Descriptions

Symbol

A0–A12

BA0, BA1

CK0, CK0#,

CK1, CK1#

CKE0, CKE1

S0#, S1#

SA0–SA2

SCL

SDA

WE#, CAS#,

RAS#

DM0–DM7

DQ0–DQ63

DQS0–DQS7

VDD

VDDSPD

VREF

VSS

NC

NF

Type

Input

Input

Input

Input

Input

Input

Input

Input/

Output

Input

Input

Input/

Output

Input/

Output

Supply

Supply

Supply

Supply

–

–

Description

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 device 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 op-

code during a MODE REGISTER SET command. BA0 and BA1 define which mode register

(mode register or extended mode register) is loaded during the LOAD MODE REGISTER

command.

Bank address: BA0 and BA1 define the device bank to which an ACTIVE, READ, WRITE, or

PRECHARGE command is being applied.

Clock: CK, CK# are differential clock inputs. All control, command, and address input signals

are sampled on the crossing of the positive edge of CK and the negative edge of CK#. Output

data (DQ and DQS) is referenced to the crossings of CK and CK#.

Clock enable: CKE (registered HIGH) activates and CKE (registered LOW) deactivates the

internal clock, input buffers, and output drivers.

Chip selects: S# enables (registered LOW) and disables (registered HIGH) the command

decoder.

Presence-detect address inputs: These pins are used to configure the SPD EEPROM address

range on the I2C bus.

Serial clock for presence-detect: SCL is used to synchronize the presence-detect data

transfer to and from the module.

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.

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

entered.

Input data mask: DM is an input mask signal for write data. Input data is masked when DM

is sampled HIGH, along with that input data, during a write access. DM is sampled on both

edges of DQS. Although the DM pins are input-only, the DM loading is designed to match

that of DQ and DQS pins.

Data input/output: Data bus.

Data strobe: Output with read data. Edge-aligned with read data. Input with write data.

Center-aligned with write data. Used to capture data.

Power supply: +2.5V ±0.2V.

Serial EEPROM positive power supply: +2.3V to +3.6V.

SSTL_2 reference voltage (VDD/2).

Ground.

No connect: These pins are not connected on the module.

No function: These pins are connected within the module, but provide no functionality.

PDF: 09005aef80a77a90/Source: 09005aef80a646bc

DDF16C64_128x64_L_H.fm - Rev. G 8/08 EN

5

Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2003 Micron Technology, Inc. All rights reserved

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