mt18vddf12872g-265 Micron Semiconductor Products, mt18vddf12872g-265 Datasheet - Page 4

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mt18vddf12872g-265

Manufacturer Part Number
mt18vddf12872g-265
Description
512mb, 1gb X72, Ecc, Sr 184-pin Ddr Sdram Rdimm
Manufacturer
Micron Semiconductor Products
Datasheet
Table 6:
PDF: 09005aef8074e85b/Source: 09005aef8072fe49
DDF18C64_128x72.fm - Rev. E 6/08 EN
DQS0–DQS17
RAS#, CAS#,
DQ0–DQ63
CK0, CK0#
V
BA0–BA1
SA0–SA2
CB0–CB7
Symbol
DD
RESET#
V
A0–12
CKE0
WE#
SDA
V
DDSPD
S0#
SCL
V
NC
/V
REF
SS
DD
Q
Pin Descriptions
Supply
Supply
Supply
Supply
Input
Input
Input
Input
Input
Input
Input
Input
Input
Type
I/O
I/O
I/O
I/O
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 and 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 and 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#.
Clock enable: CKE enables (registered HIGH) and CKE disables (registered LOW) the
internal clock, input buffers, and output drivers.
Command inputs: RAS#, CAS#, and WE# (along with S#) define the command being
entered.
Reset: 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 DQ are High-Z.
Chip select: 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 I
Serial clock for SPD EEPROM: SCL is used to synchronize the presence-detect data
transfer to and from the module.
Check bits.
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.
Serial data: SDA is a bidirectional pin used to transfer addresses and data into and out of
the presence-detect portion of the module.
Power supply: +2.5V ±0.2V.
SPD EEPROM power supply: +2.3V to +3.6V.
SSTL_2 reference voltage (V
Ground.
No connect: These pins are not connected on the module.
512MB, 1GB (x72, ECC, SR) 184-Pin DDR SDRAM RDIMM
2
C bus.
DD
4
/2).
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Pin Assignments and Descriptions
©2003 Micron Technology, Inc. All rights reserved.

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