參數(shù)資料
型號(hào): MB81V4405C-70
廠商: Fujitsu Limited
英文描述: CMOS 1M ×4 BIT Hyper Page Mode Dynamic RAM(CMOS 1M ×4 位超級(jí)頁(yè)面存取模式動(dòng)態(tài)RAM)
中文描述: 的CMOS 100萬(wàn)× 4位超頁(yè)模式動(dòng)態(tài)RAM的CMOS(100萬(wàn)× 4位超級(jí)頁(yè)面存取模式動(dòng)態(tài)內(nèi)存)
文件頁(yè)數(shù): 14/30頁(yè)
文件大?。?/td> 348K
代理商: MB81V4405C-70
14
MB81V4405C-60/MB81V4405C-70
t
WCS
t
CAH
t
ASC
t
RAH
t
ASR
t
CRP
Fig. 6 – EARLY WRITE CYCLE
RAS
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
CAS
WE
DQ
(Input)
A
0
to A
9
V
OH
V
OL
DQ
(Output)
DESCRIPTION
A write cycle is similar to a read cycle except WE is set to a Low state and OE is a “H” or “L” signal. A write cycle can be
implemented in either of three ways–early write, delayed write, or read-modify-write. During all write cycles, timing param-
eters t
RWL
, t
CWL
, t
RAL
and t
CAL
must be satisfied. In the early write cycle shown above t
WCS
satisfied, data on the DQ pins are
latched with the falling edge of CAS and written into memory.
t
RC
t
RAS
t
RP
t
CSH
t
RCD
t
CAS
HIGH-Z
“H” or “L”
ROW ADD
COLUMN ADD
t
WCR
t
WCH
t
DH
t
DS
VALID DATA IN
t
RSH
t
AR
t
DHR
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