W9864G6 WINBOND [Winbond], W9864G6 Datasheet - Page 39

• Manufacturer Part Number: W9864G6
• Description: 1M x 4 BANKS x 16 BITS SDRAM
• Manufacturer: WINBOND [Winbond]

Operating Timing Example, continued
Auto Precharge Timing (Read Cycle)
( a ) burst length = 1
( b ) burst length = 2
( c ) burst length = 4
( d ) burst length = 8
( a ) burst length = 1
( b ) burst length = 2
( c ) burst length = 4
( d ) burst length = 8
Latency=2
Latency=3
(1) CAS
(2) CAS
Command
Command
Command
Command
Command
Command
Command
Command
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
Note:
Read
Read
Read
Read
Read
Read
Read
Read
0
When the Auto precharge command is asserted, the period from Bank Activate command to
Read
Act
AP
AP
AP
1
the start of internal precgarging must be at least t
Q0
AP
Q0
Q0
Q0
AP
t
2
RP
represents the Bank Activate command.
represents the start of internal precharging.
represents the Read with Auto precharge command.
t
RP
Act
Q1
Q1
Q1
Q0
Q0
Q0
Q0
t
3
RP
t
RP
Act
Act
AP
Q2
Q2
Q1
AP
Q1
Q1
4
- 39 -
Act
Q3
Q3
Q2
Q2
t
5
RP
t
RP
Act
Q4
Q3
Q3
6
Publication Release Date: January 27, 2003
RAS
Act
Q5
Q4
7
(min).
AP
Q6
AP
Q5
8
Q7
Q6
W9864G6DB
t
9
RP
t
RP
Act
Q7
10
Revision A1
Act
11