UPD178P018A データシートの表示（PDF） - NEC => Renesas Technology

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UPD178P018A

8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD178P018A

(2) Non-port pins (2/2)

Pin Name I/O

Function

VPP

— High-voltage applied during program write/verification.

Connected directly to GND in normal operating mode.

After Reset Alternate Function

—

—

1.2 Pins in PROM Programming Mode

Pin Name I/O

RESET

Input

VPP

A0 to A16

D0 to D7

CE

OE

PGM

VDD

GND

Input

Input

I/O

Input

Input

Input

—

—

Function

PROM programming mode setting

When +5 V or +12.5 V is applied to VPP pin and a low-level signal is applied to the RESET pin, this

chip is set in the PROM programming mode.

PROM programming mode setting and high-voltage applied during program write/verification.

Address bus

Data bus

PROM enable input/program pulse input

Read strobe input to PROM

Program/program inhibit input in PROM programming mode.

Positive power supply

Ground potential

12

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