W989D6DB Datasheet, PDF (59/64 Pages) Winbond – Standard Self Refresh Mode

W989D6DB / W989D2DB
11.21 Timing Chart of Burst Stop Cycle (Burst Stop Command)
0
1
2
3
4
5
6
7
8
9
10 11
(1) Read cycle
( a ) CAS latency =2
C ommand Read
BST
DQ
( b )CAS latency = 3
C omma nd
Read
DQ
Q0 Q1 Q2 Q3 Q4
BST
Q0 Q1 Q2 Q3 Q4
(2) Write cycle
C ommand Write
BST
DQ Q0 Q1 Q2 Q3 Q4
Note: BST
represents the Burst stop command
11.22 Timing Chart of Burst Stop Cycle (Precharge Command)
In the case of
Burst Length = 8
(1) Read cycle
012345678
(a) CAS latency =2 _Read
Command
PRCG
DQ
(b) CAS latency =3
Command
Read
Q0 Q1 Q2 Q3 Q4
PRCG
DQ
(2) Write cycle
(a) CAS latency =2
Command Write
Write DQM Latency = 0
DQM
DQ
Q0 Q1
Q0 Q1 Q2 Q3 Q4
PRCG
tWR
Q2 Q3 Q4
(b) CAS latency =3
Command
Write DQM Latency = 0
DQM
Write
PRCG
tWR
DQ
Q0 Q1 Q2 Q3 Q4
Note: ^PRCG represents the Precharge command.
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Publication Release Date: Mar. 19, 2014
Revision: A01-001