ESMT
M12L64164A
Elite Semiconductor Memory Technology Inc.
Publication Date: May 2008
Revision: 3.3
33/46
Page Read & Write Cycle at Same Bank @ Burst Length = 4
0
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C L O C K
C K E
C S
R A S
C A S
A D D R
W E
D Q
D Q M
A 1 0 / A P
C L = 2
C L = 3
* N o t e 3
Row Active
( A - Bank )
Read
( A - Bank )
Read
( A - Bank )
Write
( A - Bank )
Write
( A - Bank )
P r e c h a r g e
( A - B a n k )
: D o n ' t C a r e
Q a 0
Q a 1
Q b 0
Q b 1
D d 0
D d 1
t
C D L
D c 1
D c 0
Q a 1
Q b 0
Q b 1
Q b 2
D c 1
D d 0
D d 1
D c 0
Q a 0
R a
* N o t e 2
C c
C d
R a
C a
C b
* N o t e 1
H I G H
t
R C D
t
R D L
BA1
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 , t
RDL
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.