W9864G2GH
11.16 Auto-precharge Timing (Read Cycle)
0
1
2
3
4
5
6
7
8
9
10
11
(1) CAS Latency=2
( a ) burst length = 1
Command
Read
AP
Act
tRP
DQ
Q0
( b ) burst length = 2
Command
Read
Read
Read
AP
Q0
Act
tRP
DQ
Q1
( c ) burst length = 4
Command
AP
Q2
Act
Q4
tRP
DQ
Q0
Q0
Q1
Q1
Q3
( d ) burst length = 8
Command
AP
Q6
Act
tRP
DQ
Q2
Act
Q3
Act
Q5
Q7
(2) CAS Latency=3
( a ) burst length = 1
Command
Read
Read
Read
Read
AP
tRP
DQ
Q0
Q0
Q0
Q0
( b ) burst length = 2
Command
AP
tRP
DQ
Q1
AP
Q1
( c ) burst length = 4
Command
Act
Q4
tRP
DQ
Q2
Q2
Q3
Q3
( d ) burst length = 8
Command
AP
Q5
Act
tRP
DQ
Q1
Q6
Q7
Note:
Read
AP
Act
represents the Read with Auto precharge command.
represents the start of internal precharging.
represents the Bank Activate command.
When the Auto precharge command is asserted, the period from Bank Activate command to
the start of internal precgarging must be at least tRAS (min).
Publication Release Date:Aug. 13, 2007
Revision A09
- 40 -
WINBOND [ WINBOND ]
