參數(shù)資料
型號(hào): UPD46128512F9-CR2
廠商: NEC Corp.
英文描述: 128M-BIT CMOS MOBILE SPECIFIED RAM 8M-WORD BY 16-BIT EXTENDED TEMPERATURE OPERATION
中文描述: 128兆位CMOS移動(dòng)指明內(nèi)存800萬(wàn)字由16位溫度范圍
文件頁(yè)數(shù): 5/82頁(yè)
文件大?。?/td> 817K
代理商: UPD46128512F9-CR2
Preliminary Data Sheet M17507EJ2V0DS
5
μ
PD46128512-X
Truth Table
Asynchronous Operation
Mode
/CE1
CE2
/ADV
/OE
/WE
/LB
/UB
DQ
/WAIT
DQ0 to DQ7 DQ8 to DQ15
Not selected (Standby Mode 1)
H
H
×
×
×
×
×
High-Z
High-Z
High-Z
Not selected (Standby Mode 2)
Note1
×
L
×
×
×
×
×
High-Z
High-Z
High-Z
Word read
L
H
Note3
L
H
L
L
D
OUT
D
OUT
High-Z
Lower byte read
L
H
D
OUT
High-Z
High-Z
Upper byte read
H
L
High-Z
D
OUT
High-Z
Output disable
H
H
High-Z
High-Z
High-Z
Output disable
H
×
×
High-Z
High-Z
High-Z
Word write
L
L
L
D
IN
D
IN
High-Z
Lower byte write
L
H
D
IN
High-Z
High-Z
Upper byte write
H
L
High-Z
D
IN
High-Z
Abort write
Note2
H
H
High-Z
High-Z
High-Z
Notes 1.
CE2 pin must be fixed HIGH except Standby Mode 2 (refer to
2.3 Standby Mode Status Transition
).
2.
If /WE = LOW and /LB = /UB = HIGH, memory does not accept write data, so write operation is not available.
3.
Fixed LOW or toggle HIGH
LOW
HIGH
Remark
H, HIGH : V
IH
, L, LOW : V
IL
,
×
: V
IH
or V
IL
Clock pin must be fixed either LOW or HIGH.
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