ESMT
M12S64322A
Page Read & Write Cycle at Same Bank @ Burst Length = 4
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C L O C K
H I G H
C K E
C S
tR C D
R A S
* N o t e 2
C A S
A D D R
R a
C a
C d
C b
C c
BA1
BA0
A10 /AP
R a
tR D L
Qa0
Qa1 Qb0
Dd0 Dd1
Qb2
Qb1
Dc 1
Qb1
CL = 2
Dc 0
Dc 0
D Q
CL = 3
Dc 1
Qa1
Qa0
Qb0
Dd0
Dd1
tC D L
W E
* N o t e 1
* N o t e 3
D Q M
Read
( A - Bank )
Read
( A - Bank )
Write
( A - Bank )
Write
( A - Bank )
Row Active
( A - Bank )
Prechar ge
(A - B an k )
: D o n ' t C a r e
Note : 1. To Write data before burst read ends. DQM should be asserted three cycle prior to write command to avoid bus
contention.
2. Row precharge will interrupt writing. Last data input , tRDL before row precharge , will be written.
3. DQM should mask invalid input data on precharge command cycle when asserting precharge before end of burst. Input
data after Row precharge cycle will be masked internally.
Elite Semiconductor Memory Technology Inc.
Publication Date: May. 2007
Revision: 1.0 33/46
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
