µPD6604
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
—
Open
High-level output
—
OUTPUT mode (LED) setting
OFF mode setting
Directly connect to GND
—
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.
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Data Sheet U11281EJ3V0DS00