W989D6CB Datasheet, PDF (59/67 Pages) Winbond – 512Mb Mobile LPSDR

W989D6CB / W989D2CB
10.19 Timing Chart of Read to Write Cycle
In the case of Burst Length = 4
(1) CAS Latency = 2
0
1
2
3
4
5
6
7
DQM Latency = 2
( a ) Command
Read Write
DQM
DQ
D0 D1 D2 D3
( b ) Command
DQM
DQ
(2) CAS Latency = 3
DQM Latency = 2
( a ) Command
DQM
DQ
( b ) Command
DQM
DQ
Read
Write
D0 D1 D2 D3
Read Write
D0 D1 D2 D3
Read
Write
D0 D1 D2 D3
Note: The Output data must be masked by DQM to avoid I/O conflict.
“Dn” = Write data, and “Qn” = Read data
512Mb Mobile LPSDR
8
9
10 11
10.20 Timing Chart for Write to Read Cycle
In the case of Burst
Length=4
01
2
3
4
5
6
7
8
9 10 11
(1) CAS Latency=2
( a ) Command
DQM
DQ
Write Read
tLDR
D0
Q0 Q1 Q2 Q3
( b ) Command
DQM
DQ
(2) CAS Latency=3
( a ) Command
DQM
DQ
( b ) Command
DQM
DQ
Write
D0
Read
tLDR
D1
Write Read
tLDR
D0
Write
Read
tLDR
D0 D1
Q0 Q1 Q2 Q3
Q0 Q1 Q2 Q3
Q0 Q1 Q2 Q3
Note: “Dn” = Write data, and “Qn” = Read data
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Publication Release Date: Sep, 22, 2011
Revision A01-005