參數(shù)資料
型號(hào): μPD4265400
廠商: NEC Corp.
英文描述: 64 M-Bit Dynamic RAM(64M 動(dòng)態(tài)RAM)
中文描述: 64 m位動(dòng)態(tài)隨機(jī)存儲(chǔ)器(RAM的6400動(dòng)態(tài))
文件頁(yè)數(shù): 20/28頁(yè)
文件大?。?/td> 256K
代理商: ΜPD4265400
μ
PD4264400, 4265400
20
Fast Page Mode Read Modify Write Cycle
Remark
In the fast page mode, read, write and read modify write cycles are available for each of the consecutive
CAS cycles within the same RAS cycle.
t
RCS
CAS
V
IH—
V
IL—
t
CPN
t
CP
t
CAS
t
CAS
t
CP
t
PRWC
t
CAS
t
RCD
RAS
V
IH—
V
IL—
t
RASP
t
RP
t
CRP
Address
V
IH—
V
IL—
t
ASR
t
RAH
t
RAD
t
ASC
t
CAH
t
ASC
t
CAH
t
CAH
t
ASC
Row
Col.
Col.
Col.
t
RAL
WE
V
IH—
V
IL—
t
RWD
t
AWD
t
CWD
t
OLZ
I/O
V
IH—
V
IL—
t
DH
t
DS
t
WP
t
RCS
t
CWL
t
ACP
t
CPWD
t
AWD
t
CWD
t
WP
t
CWL
t
ACP
t
CPWD
t
AWD
t
CWD
t
RCS
t
CWL
t
RWL
t
WP
OE
V
IH—
V
IL—
I/O
V
OH—
V
OL—
out
t
OEZ
t
CLZ
t
OED
t
OEA
t
CAC
t
AA
t
RAC
in
t
OEA
t
OEH
t
CAC
t
AA
t
OLZ
t
DH
t
DS
out
t
OEZ
t
CLZ
t
OED
in
t
OLZ
t
DH
t
DS
out
t
OEZ
t
CLZ
t
OED
in
t
OEH
t
AA
t
CAC
t
OEA
t
OEH
Hi-Z
Hi-Z
Hi-Z
Hi-Z
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