UPD65 NEC [NEC], UPD65 Datasheet - Page 8

• Manufacturer Part Number: UPD65
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

1.3 Dealing with Unused Pins
8
The following connections are recommended for unused pins.
Caution The I/O mode and the terminal output level are recommended to be fixed by setting
K
REM
S
S
S
K
I/O
1
0
2
1
/LED
them repeatedly in each loop of the program.
Pin
INPUT mode
OUTPUT mode
Table 1-1. Connections for Unused Pins
High-level output
OUTPUT mode (LED) setting
OFF mode setting
Data Sheet U14380EJ2V0DS00
Inside the microcontroller
—
—
—
—
Connection
Leave open
Directly connect these
pins to GND
Outside the microcontroller
PD64A, 65