W989D6DB Datasheet, PDF (58/64 Pages) Winbond – Standard Self Refresh Mode

W989D6DB / W989D2DB
11.19 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 ) Command
Read Write
DQM
DQ
D0
D1
D2
D3
( b ) Command
DQM
DQ
(2) CAS Latency=3
( a ) Command
DQM
DQ
( b ) Command
Read
Write
D0
D1
D2
D3
Read Write
D0
D1
D2
D3
Read
Write
DQM
DQ
D0
D1
D2
D3
Note: The Output data must be masked by DQM to avoid I/O conflict.
11.20 Timing Chart of Write to Read Cycle
In the case of Burst
Length = 4
0
(1) CAS latency = 2
(a) Command
DQM
DQ
(b) Command
DQM
DQ
(2) CAS latency = 3
(a) Command
DQM
DQ
(b) Command
DQM
DQ
1
2
3
4
5
6
7
8
9
Write Read
tLDR
DO
Write
QO
Q1
Q2
Q3
Read
tLDR
DO
D1
QO
Q1
Q2
Q3
Write Read
tLDR
DO
Write
Read
tLDR
DO
D1
QO
Q1
Q2
Q3
QO
Q1
Q2
Q3
10 11
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Publication Release Date: Mar. 19, 2014
Revision: A01-001