mt9lsdt1672g-133 Micron Semiconductor Products, mt9lsdt1672g-133 Datasheet - Page 4

• Manufacturer Part Number: mt9lsdt1672g-133
• Description: 128mb, 256mb X72, Ecc, Sr 168-pin Sdram Rdimm
• Manufacturer: Micron Semiconductor Products

Table 5:
PDF: 09005aef80a2e32f/Source: 09005aef80a2e30d
SD9C16_32x72.fm - Rev. D 1/08 EN
RAS#, CAS#, WE#
DQMB0–DQMB7
DQ0–DQ63
BA0, BA1
CK0–CK3
SA0–SA2
CB0–CB7
Symbol
S0#, S2#
A0–A12
REGE
CKE0
SDA
V
SCL
V
NC
NF
DD
SS
Pin Descriptions
Output
Output
Output
Supply
Supply
Input/
Input/
Input/
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Type
–
–
Description
Address inputs: Sampled during the ACTIVE and READ/WRITE commands, with A10
defining auto precharge, to select one location out of the memory array in the
respective device bank. A10 is sampled during a PRECHARGE command to determine
whether both device banks are precharged (A10 HIGH). The address inputs also
provide the op-code during a LOAD MODE REGISTER command. A0–A11 (256MB) and
A0–A12 (256MB).
Bank address inputs: BA0 and BA1 define the device bank to which an ACTIVE,
READ, WRITE, or PRECHARGE command is being applied.
Clock: CK0 is distributed through an on-board PLL to all devices. CK1–CK3 are
terminated.
Clock enable: CKE enables (registered HIGH) and disables (registered LOW) the CK
signal. Deactivating the clock provides power-down and SELF REFRESH operations (all
device banks idle) or CLOCK SUSPEND operation (burst access in progress). CKE is
synchronous except after the device enters power-down and self refresh modes, where
CKE becomes asynchronous until after exiting the same mode. The input buffers,
including CK, are disabled during power-down and self refresh modes, providing low
standby power.
Input/output mask: DQMB is an input mask signal for write accesses and an output
enable signal for read accesses. Input data is masked when DQMB is sampled HIGH
during a WRITE cycle. The output buffers are placed in a High-Z state (two-clock
latency) when DQMB is sampled HIGH during a READ cycle.
Command inputs: RAS#, CAS#, and WE# (along with S#) define the command being
entered.
Register enable.
Chip select: S# enables (registered LOW) and disables (registered HIGH) the command
decoder. All commands are masked when S# is registered HIGH. S# is considered part
of the command code.
Presence-detect address inputs: These pins are used to configure the presence-
detect device.
Serial clock for presence-detect: SCL is used to synchronize the presence-detect
data transfer to and from the module.
Check bits.
Data input/output: Data bus.
Serial presence-detect data: SDA is a bidirectional pin used to transfer addresses
and data into and data out of the EEPROM portion of the module.
Power supply: +3.3V ±0.3V.
Ground.
Not connected: These pins are not connected on the module.
No function: Connected within the module but provides no functionality.
128MB, 256MB (x72, ECC, SR): 168-Pin SDRAM RDIMM
4
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Pin Assignments and Descriptions
©2003 Micron Technology, Inc. All rights reserved