MT16LSDT3264 Micron, MT16LSDT3264 Datasheet - Page 5

• Manufacturer Part Number: MT16LSDT3264
• Description: 168-Pin SDRAM DIMMs (x64)
• Manufacturer: Micron

PIN DESCRIPTIONS*
*Pin numbers do not necessarily correlate with symbols.
**Pin numbers listed in module pinout order.
16, 32 Meg x 64 SDRAM DIMMs
SD8_16C16_32X64AG_C.p65 – Rev. C, Pub. 9/01
117, 118, 119, 120, 121,
33, 34, 35, 36, 37, 38,
112-113, 130-131
PIN NUMBERS
42, 79, 125, 163
30, 45, 114, 129
28-29, 46-47,
27, 115, 111
63, 128
39, 122
123
81
83
DQMB0-DQMB7
RAS#, CAS#,
CKE0, CKE1
SYMBOL
BA0, BA1
CK0-CK3
S0#-S3#
A0-A11
WE#
SCL
WP
Input
TYPE
Input
Input
Input
Input
Input
Input
Input
Input
5
Command Inputs: RAS#, CAS#, and WE# (along with
S0#-S3#) define the command being entered.
Clock: CK0-CK3 are driven by the system clock. All
SDRAM input signals are sampled on the positive
edge of CK. CK also increments the internal burst
counter and controls the output registers.
Clock Enable: CKE0-CKE1 activate (HIGH) and
deactivate (LOW) the CK0-CK3 signals. Deactivating
the clock provides PRECHARGE POWER-DOWN and
SELF REFRESH operation (all device banks idle),
ACTIVE POWER-DOWN (row ACTIVE in any device
bank) or CLOCK SUSPEND operation (burst access in
progress). CKE0-CKE1 are synchronous except after the
device enters power-down and self refresh modes,
where CKE0-CKE1 become asynchronous until after
exiting the same mode. The input buffers, including
CK0-CK3, are disabled during power-down and self
refresh modes, providing low standby power.
Chip Select: S0#-S3# enable (registered LOW) and
disable (registered HIGH) the command decoder. All
commands are masked when S0#-S3# are registered
HIGH. S0#-S3# are considered part of the command
code.
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.**
Bank Address: BA0 and BA1 define to which device
bank the ACTIVE, READ, WRITE, or PRECHARGE
command is being applied.
Address Inputs: A0-A11 are sampled during the
ACTIVE command (row-address A0-A11) and
READ/WRITE command (column-address A0-A9, 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 if all device banks are to be precharged
(A10 HIGH) or device bank selected by BA0, BA1
(LOW). The address inputs also provide the op-code
during a LOAD MODE REGISTER command.
Write Protect: Serial presence-detect hardware write
protect.
Serial Clock for Presence-Detect: SCL is used to
synchronize the presence-detect data transfer to and
from the module.
168-PIN SDRAM DIMMs
128MB / 256MB (x64)
DESCRIPTION
©2001, Micron Technology, Inc.