W989D6CB Datasheet, PDF (60/67 Pages) Winbond – 512Mb Mobile LPSDR

W989D6CB / W989D2CB
10.21 Timing Chart for Burst Stop Cycle (Burst Stop Command)
(1) Read cycle
012345678
( a ) CAS latency =2
Command Read
BST
DQ
( b )CAS latency = 3
Q0 Q1 Q2 Q3 Q4
Command
DQ
Read
BST
Q0 Q1 Q2 Q3 Q4
(2) Write cycle
Command Write
BST
DQ
Q0 Q1 Q2 Q3 Q4
512Mb Mobile LPSDR
9
10 11
Note: BST represents the Burst stop command
“Dn” = Write data, and “Qn” = Read data
10.22 Timing Chart for Burst Stop Cycle (Precharge Command)
In the case of urst
Length = 8
(1) Read cycle
012345678
(a) CAS latency =2
Command
Read
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
DQ
Write
Q0
PRCG
tWR
Q1 Q2 Q3 Q4
Note: ^PRCG represents the Precharge command.
“Dn” = Write data, and “Qn” = Read data.
9 10 11
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Publication Release Date: Sep, 22, 2011
Revision A01-005