參數(shù)資料
型號: IS42S16100C1-5TL
廠商: INTEGRATED SILICON SOLUTION INC
元件分類: DRAM
英文描述: 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
中文描述: 1M X 16 SYNCHRONOUS DRAM, 5 ns, PDSO50
封裝: 0.400 INCH, LEAD FREE, PLASTIC, TSOP2-50
文件頁數(shù): 25/79頁
文件大?。?/td> 755K
代理商: IS42S16100C1-5TL
IS42S16100C1
ISSI
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. A
07/21/04
25
Read With Auto-Precharge
The read with auto-precharge command first executes a
burst read operation and then puts the selected bank in the
precharged state automatically. After the precharge com-
pletes, the bank goes to the idle state. Thus this command
performs a read command and a precharge command in a
single operation.
During this operation, the delay period (t
PQL
) between the
last burst data output and the start of the precharge
operation differs depending on the
CAS
latency setting.
When the
CAS
latency setting is two, the precharge
operation starts on one clock cycle before the last burst
data is output (t
PQL
= –1). When the
CAS
latency setting is
three, the precharge operation starts on two clock cycles
before the last burst data is output (t
PQL
= –2). Therefore,
the selected bank can be made active after a delay of t
RP
from the start position of this precharge operation.
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.
CAS
Latency
t
PQL
3
2
–2
–1
COMMAND
DQ
CLK
t
RP
t
PQL
READA 0
ACT 0
PRECHARGE START
READ WITH AUTO-PRECHARGE
(BANK 0)
D
OUT
0
D
OUT
1
D
OUT
2
D
OUT
3
COMMAND
DQ
CLK
READA 0
ACT 0
t
RP
PRECHARGE START
READ WITH AUTO-PRECHARGE
(BANK 0)
t
PQL
D
OUT
0
D
OUT
1
D
OUT
2
D
OUT
3
CAS
latency = 2, burstlength = 4
CAS
latency = 3, burstlength = 4
相關PDF資料
PDF描述
IS42S16100C1-6T 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S16100C1-6TL 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S16100C1-7T 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S16100C1-7TI 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S16100C1-7TL 512K Words x 16 Bits x 2 Banks (16-MBIT) SYNCHRONOUS DYNAMIC RAM
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