HD6433802H Datasheet, PDF(188/435 Page) Hitachi Semiconductor – Single-Chip Microcomputer

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HD6433802H Datasheet, PDF (188/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

◁

8.12 Application Note

8.12.1 How to Handle an Unused Pin

If an I/O pin not used by the user system is floating, pull it up or down.

â¢ If an unused pin is an input pin, handle it in one of the following ways:

ï£§ Pull it up to VCC with an on-chip pull-up MOS.

ï£§ Pull it up to VCC with an external resistor of approximately 100 kâ¦.

ï£§ Pull it down to VSS with an external resistor of approximately 100 kâ¦.

ï£§ For a pin also used by the A/D converter, pull it up to AVCC.

â¢ If an unused pin is an output pin, handle it in one of the following ways:

ï£§ Set the output of the unused pin to high and pull it up to VCC with an on-chip pull-up MOS.

ï£§ Set the output of the unused pin to high and pull it up to VCC with an external resistor of

approximately 100 kâ¦.

ï£§ Set the output of the unused pin to low and pull it down to GND with an external resistor of

approximately 100 kâ¦.

170

▷