參數資料
型號: 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移動指明內存800萬字由16位溫度范圍
文件頁數: 56/82頁
文件大小: 817K
代理商: UPD46128512F9-CR2
Preliminary Data Sheet M17507EJ2V0DS
56
μ
PD46128512-X
Figure 7-24. Asynchronous Read-Write Cycle Timing Chart
/CE1 (Input)
Address (Input)
DQ (Input/Output)
High-Z
High-Z
High-Z
t
RC
/OE (Input)
t
AA
A1
/LB, /UB (Input)
/WE (Input)
t
ASO
t
ACE
t
WC
t
CW
t
WR
t
OES
t
WR
t
OLZ
t
OE
t
WP
t
BA
t
DW
t
DH
t
RC
t
CLZ
t
BLZ
t
OHZ
t
WR
t
BW
Data Out Q1
Data In D1
Cautions 1. During address transition, at least one of pins /CE1 and /WE, or both of /LB and /UB pins should
be inactivated.
2. Do not input data to the DQ pins while they are in the output state.
3. In write cycle, CE2 and /OE should be fixed HIGH.
4. /ADV should be fixed LOW or toggled HIGH
LOW
HIGH. CLK should be fixed HIGH or LOW.
Remark
Write operation is done during the overlap time of LOW of following signals.
/CE1
/WE
/LB and/or /UB
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