UPD431000A-xxx NEC, UPD431000A-xxx Datasheet - Page 16

• Manufacturer Part Number: UPD431000A-xxx
• Description: 1M-BIT CMOS STATIC RAM 128K-WORD BY 8-BIT
• Manufacturer: NEC

Write Cycle Timing Chart 2 (/CE1 Controlled)
Cautions 1. During address transition, at least one of pins /CE1, CE2, /WE should be inactivated.
Remark
16
Address (Input)
2. Do not input data to the I/O pins while they are in the output state.
Write operation is done during the overlap time of a low level /CE1, /WE and a high level CE2.
/CE1 (Input)
CE2 (Input)
/WE (Input)
I/O (Input)
High impedance
t
AS
Data Sheet M11657EJBV0DS
t
AW
t
t
CW2
WC
t
WP
t
CW1
t
DW
Data in
t
t
WR
DH
impedance
PD431000A
High