UPD6P4BGS datasheet(9/32 Pages) NEC

tên linh kiện	UPD6P4BGS

Giải thích chi tiết về linh kiện	4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION

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µPD6P4B

Data Sheet U13594EJ2V0DS00

1.4 Dealing with Unused Pins

The following connections are recommended for unused pins in the normal operation mode.

Table 1-1. Connections for Unused Pins

Connection

Inside the microcontroller

Outside the microcontroller

KI/O

INPUT mode

—

Open

OUTPUT mode

High-level output

REM

—

S1/LED

OUTPUT mode (LED) setting

OFF mode setting

Directly connected to GND

—

RESETNote

Built-in POC circuit

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.

1.5 Notes on Using KI Pin at Reset

In order to prevent malfunction, be sure to input a low level to more than one of pins KI0 to KI3 when reset is

released (when RESET pin changes from low level to high level, or POC is released due to supply voltage startup).

UPD6P4BGS bảng dữ liệu(PDF) 9 Page - NEC