7630_03 Datasheet, PDF (74/238 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.1 I/O ports
2.1.4 Handling examples of unused pins
Table 2.1.1 Handling of unused pins
Name of Pins/Ports
Handling
P0, P11(Note) P12 to P17, P2, Configure as inputs and pull to VCC or VSS via a resistor of 1 kΩ to 10
P3, P4
kΩ, or configure as outputs and leave open (expect P11).
VREF
Connect to VSS(GND) or leave open.
AVSS
Connect to VSS(GND).
XOUT
Leave open (only when using external clock).
Note: The P11 pin of the built-in programmable ROM version is used in common with the VPP pin, insert
a register of about 5 kΩ in series and connect by the shortest wiring.
2-8
7630 Group User’s Manual