Application Note; The Management Of The Un-Use Terminal - Renesas H8 Series Hardware Manual

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
 Pull it up to V
CC
 Pull it down to V
 For a pin also used by the A/D converter, pull it up to AV
• 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
 Set the output of the unused pin to high and pull it up to V
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.
with an on-chip pull-up MOS.
with an external resistor of approximately 100 kΩ.
with an external resistor of approximately 100 kΩ.
SS
.
CC
with an on-chip pull-up MOS.
CC
with an external resistor of
CC
Rev. 7.00 Mar 10, 2005 page 243 of 652
Section 8 I/O Ports
REJ09B0042-0700