upd63a Renesas Electronics Corporation., upd63a Datasheet - Page 8

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upd63a

Manufacturer Part Number
upd63a
Description
4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
Manufacturer
Renesas Electronics Corporation.
Datasheet

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1.3 Dealing with Unused Pins
8
The following connections are recommended for unused pins.
Note If the circuit is an applied one requiring high reliability, be sure to design it in such a manner that the RESET
Caution The I/O mode and the terminal output level are recommended to be fixed by setting them
signal is entered externally.
repeatedly in each loop of the program.
K
REM
S
S
K
RESET
I/O
1
0
I
/LED
Note
Pin
INPUT mode
OUTPUT mode
Table 1-1. Connections for Unused Pins
High-level output
OUTPUT mode (LED) setting
OFF mode setting
Built-in POC circuit
Inside the microcontroller
Connection
Leave open
Directly connect these
pins to GND
Leave open
Outside the microcontroller
PD63, 63A, 64

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