W9864G6JT Datasheet, PDF (37/42 Pages) Winbond – 1M  4 BANKS  16 BITS SDRAM

W9864G6JT
11.17 Timing Chart of Read to Write Cycle
In the case of Burst Length = 4
0
1
2
3
4
5
6
7
8
9
10 11
(1) CAS Latency=2
( a ) C ommand
Read Write
DQM
DQ
D0 D1 D2 D3
( b ) C ommand
DQM
DQ
Read
Wri te
D0 D1 D2 D3
(2) CAS Latency=3
( a ) C ommand
DQM
DQ
( b ) C ommand
DQM
DQ
Read Write
D0 D1 D2 D3
Read
Wri te
D0 D1 D2 D3
Note: The Output data must be masked by DQM to avoid I/O conflict
11.18 Timing Chart of Write to Read Cycle
In the case of Burst Length=4
(1) CAS Latency=2
( a ) C ommand
D QM
DQ
01
2
3
Write Read
D0
4
5
6
7
8
Q0 Q1 Q2 Q3
9 10 11
( b ) C ommand
D QM
DQ
(2) CAS Latency=3
( a ) C ommand
D QM
Wri te
Read
D0 D1
Write Read
Q0 Q1 Q2 Q3
DQ
D0
Q0 Q1 Q2 Q3
( b ) C ommand
D QM
Wri te
Read
DQ
D0 D1
Q0 Q1 Q2 Q3
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Publication Release Date: Dec. 23, 2011
Revision A01