upd64a Renesas Electronics Corporation., upd64a Datasheet - Page 8

• Manufacturer Part Number: upd64a
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

1.3 Recommended Connection of Unused Pins
8
The following connections are recommended for unused pins.
Caution The I/O mode and the pin output level are recommended to be fixed by setting them
K
REM
S
S
S
K
I/O
1
0
2
I
/LED
repeatedly in each loop of the program.
Pin
Input mode
Output mode
Table 1-1. Recommended Connection of Unused Pins
High-level output
Output mode (LED) setting
OFF mode setting
Data Sheet U14380EJ3V0DS00
Inside Microcontroller
—
—
—
—
Connection
Leave open
Directly connect to GND
Outside Microcontroller
PD64A, 65