參數(shù)資料
型號: IS42S16100
廠商: Integrated Silicon Solution, Inc.
英文描述: 512K Words x 16 Bits x 2 Banks (16-MBIT)Synchronous DRAM(512K x 16 x 2組同步動態(tài)RAM)
中文描述: 為512k字× 16位× 2銀行(16兆),同步DRAM(為512k × 16 × 2組同步動態(tài)RAM)的
文件頁數(shù): 27/79頁
文件大小: 656K
代理商: IS42S16100
IS42S16100
ISSI
Integrated Silicon Solution, Inc.
1-800-379-4774
Rev. A
09/29/00
27
Write With Auto-Precharge
The write with auto-precharge command first executes a
burst write operation and then puts the selected bank in
the precharged state automatically. After the precharge
completes the bank goes to the idle state. Thus this
command performs a write command and a precharge
command in a single operation.
During this operation, the delay period (t
DAL
) between the
last burst data input and the completion of the precharge
operation differs depending on the
CAS
latency setting.
The delay (t
DAL
) is t
RP
plus one CLK period. That is, the
precharge operation starts one clock period after the last
burst data input.
CAS
latency = 2, burst length = 4
CAS
latency = 3, burst length = 4
CAS
Latency
t
DAL
3
2
1CLK
+t
RP
1CLK
+t
RP
Therefore, the selected bank can be made active after a
delay of t
DAL
.
The selected bank must be set to the active state before
executing this command.
The auto-precharge function is invalid if the burst length is
set to full page.
t
RP
t
DAL
PRECHARGE START
I/O
WRITE A0
COMMAND
CLK
ACT 0
WRITE WITH AUTO-PRECHARGE
(BANK 0)
t
RP
t
DAL
PRECHARGE START
WRITE A0
COMMAND
I/O
CLK
D
IN
0
D
IN
1
D
IN
2
D
IN
3
ACT 0
WRITE WITH AUTO-PRECHARGE
(BANK 0)
D
IN
0
D
IN
1
D
IN
2
D
IN
3
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