UPD63A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD63A

4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD63, 63A, 64

1.3 Dealing with Unused Pins

The following connections are recommended for unused pins.

Table 1-1. Connections for Unused Pins

Pin

KI/O

INPUT mode

OUTPUT mode

REM

S1/LED

S0

KI

RESETNote

Connection

Inside the microcontroller

Outside the microcontroller

—

Leave open

High-level output

—

OUTPUT mode (LED) setting

OFF mode setting

—

Directly connect these

pins to GND

Built-in POC circuit

Leave open

Note If the circuit is an applied one requiring high reliability, be sure to design it in such a manner that the RESET

signal is entered externally.

Caution The I/O mode and the terminal output level are recommended to be fixed by setting them

repeatedly in each loop of the program.

8

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