IBM0625404GT3B IBM0625164GT3B
IBM0625804GT3B IBM06254B4GT3B
256Mb Double Data Rate Synchronous DRAM
Advance
Read to Precharge: CAS Latencies (Burst Length = 4 or 8)
CAS Latency = 2
CK
CK
Read
NOP
PRE
NOP
NOP
ACT
Command
t
RP
BA a or all
BA a, COL n
BA a, ROW
Address
CL=2
DQS
DQ
DOa-n
CAS Latency = 2.5
CK
CK
Read
NOP
PRE
NOP
NOP
ACT
Command
t
RP
BA a or all
BA a, COL n
BA a, ROW
Address
CL=2.5
DQS
DQ
DOa-n
DO a-n = data out from bank a, column n.
Cases shown are either uninterrupted bursts of 4 or interrupted bursts of 8.
3 subsequent elements of data out appear in the programmed order following DO a-n.
Shown with nominal t , t , and t
.
DQSQ
AC DQSCK
Don’t Care
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Use is further subject to the provisions at the end of this document.
29L0011.E36997
10/99
Page 28 of 75
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