Timing chart of read to write cycle, Timing chart of write to read cycle – Rainbow Electronics W982516CH User Manual
Page 36
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W982516CH
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Operating Timing Example, continued
Timing Chart of Read to Write Cycle
Note: The Output data must be masked by DQM to avoid I/O conflict
11
10
9
8
7
6
5
4
3
2
1
0
(1) CAS Latency=2
In the case of Burst Length = 4
Read
Read
Write
Write
D Q
D Q
( b ) Command
DQM
DQM
D0
D1
D2
D3
D0
D1
D2
D3
( a ) Command
(2) CAS Latency=3
Read
Write
Read
Write
D0
D1
D2
D3
( a ) Command
D Q
D Q
DQM
( b ) Command
DQM
D0
D1
D2
D3
Timing Chart of Write to Read Cycle
Read
Write
0
11
10
9
8
7
6
5
4
3
2
1
Q0
Read
Q1
Q2
Q3
Read
Read
Write
Write
Q0
Q1
Q2
Q3
Write
Q0
Q1
Q2
Q3
D0
D1
DQ
DQ
( a ) Command
DQ
DQ
DQM
( b ) Command
DQM
( a ) Command
( b ) Command
DQM
DQM
In the case of Burst Length=4
(1) CAS Latency=2
(2) CAS Latency=3
D0
D0
D1
Q0
Q1
Q2
Q3
D0
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