NT5DS32M4AT
NT5DS16M8AT
128Mb Double Data Rate SDRAM
Read Burst: CAS Latencies (Burst Length = 4)
CK
CK
Command
Address
DQS
DQ
QFC
(Optional)
CAS Latency = 2
Read
BA a,COL n
NOP
NOP
NOP
NOP
CL=2
tQCS
DOa-n
tQCH
NOP
CAS Latency = 2.5
CK
CK
Command
Address
DQS
DQ
QFC
(Optional)
Read
BA a,COL n
NOP
NOP
NOP
NOP
CL=2.5
tQ C S
DOa-n
tQCH
NOP
DO a-n = data out from bank a, column n.
Don’t Care
3 subsequent elements of data out appear in the programmed order following DO a-n.
Shown with nominal tAC, tDQSCK, and tDQSQ .
QFC is an open drain driver. The output high level is achieved through an external pull up resistor connected to VDDQ .
REV 1.0
May, 2001
21
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