23C256 Просмотр технического описания (PDF) - NEC => Renesas Technology
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23C256 Datasheet PDF : 32 Pages
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µPD23C256112A
Operation Modes
Command input, address input, and serial read are all performed from I/O pins, and the respective statuses are
controlled by the CLE, ALE, /WE, /RE, and /CE signals.
Command
input cycle
Address input cycle
Serial read cycle
CLE
/CE
/WE
ALE
/RE
High-Z
I/O0 to I/O7
High-Z
High-Z
R, /B
Busy
Operation mode
Mode
CLE
ALE
/CE
/WE
/RE
Command input cycle
H
L
L
H
Address input cycle
L
H
L
H
Serial read cycle
L
L
L
H
Operation mode during serial read
Mode
CLE
ALE
/CE
/WE
/RE
I/O0 to I/O7
Data output
Output High-Z
Standby
L
L
L
H
L
Data output
L
L
L
H
H
High-Z
L
L
H
H
×
High-Z
Remark × : VIH or VIL
Data Sheet M15902EJ2V0DS
7
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