Renesas H8 Series Hardware Manual

Section 8 I/O Ports
Rev. 7.00 Mar 10, 2005 page 243 of 652
REJ09B0042-0700
8.13 Application Note
8.13.1 The Management of the Un-Use Terminal
If an I/O pin not used by the user system is floating, pull it up or down.
• If an unused pin is an input pin, handle it in one of the following ways:
 Pull it up to V
CC
with an on-chip pull-up MOS.
 Pull it up to V
CC
with an external resistor of approximately 100 kΩ.
 Pull it down to V
SS
with an external resistor of approximately 100 kΩ.
 For a pin also used by the A/D converter, pull it up to AV
CC
.
• If an unused pin is an output pin, handle it in one of the following ways:
 Set the output of the unused pin to high and pull it up to V
CC
with an on-chip pull-up MOS.
 Set the output of the unused pin to high and pull it up to V
CC
with an external resistor of
approximately 100 kΩ.
 Set the output of the unused pin to low and pull it down to GND with an external resistor of
approximately 100 kΩ.

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English