W9864G6 WINBOND [Winbond], W9864G6 Datasheet - Page 38

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

Operating Timing Example, continued
Auto Precharge Timing (Write 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
(1) CAS
Latency=3
Command
Command
Command
Command
(2) CAS
Command
Command
Command
Command
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
Note:
Write
Write
Write
Write
Write
Write
Write
Write
D0
D0
D0
D0
D0
D0
D0
D0
0
When the Auto precharge command is asserted, the period from Bank Activate
Write
t
t
WR
WR
Act
AP
command to the start of internal precgarging must be at least tRAS (min.)
D1
D1
D1
D1
D1
D1
AP
AP
1
t
t
WR
WR
D2
D2
D2
D2
AP
AP
t
2
RP
represents the Write with Auto precharge command.
represents the start of internal precharging.
represents the Bank Activate command.
t
RP
D3
D3
D3
D3
Act
t
3
RP
t
t
t
RP
WR
WR
D4
D4
Act
Act
AP
AP
4
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D5
D5
Act
t
5
RP
t
RP
D6
D6
Act
6
D7
D7
Act
7
t
t
WR
WR
AP
AP
8
W9864G6DB
t
9
RP
t
RP
Act
10
Act
11