P&E Microcomputer Systems xPC56XXMB User Manual page 16

Mini-Module hardware manual for more details.
Jumper Setting
1+2 (default
on)
3+4 (default
on)
5+6 (default
on)
7+8 (default
on)
J9 – Buttons Driving Configuration
Selects whether the buttons drive logic high or drive logic low when pressed.
Jumper Setting
1+2
2+3 (default)
J40 – Buttons Idle Configuration
Selects whether the I/O pins are pulled logic high or pulled logic low. This
controls the defaultlogic level of the I/O pins when the buttons are not
12
Effect
KEY1 connected to processor I/O pin
KEY2 connected to processor I/O pin
KEY3 connected to processor I/O pin
KEY4 connected to processor I/O pin
Effect
When pressed, buttons will send logic high to the
connected I/O pin
When pressed, buttons will send logic low to the
connected I/O pin
xPC56XXMB User Manual