Matrix Keypad routine

[CluckShot]

I know the Pull up Resistor attaches to Vss but where does it go else wise? Also... What happens to other test programs etc by its presence?

Paul

[Ioannis]

To port B.

As for the programs, what programs? Depends on what are the programs doing... Usually the port B with PU enabled, reads as all 1s.

Ioannis