P&E Microcomputer Systems xPC56XXMB User Manual - page 17
of
37
xPC56XXMB User Manual
13
pressed.
Figure 3-3: Buttons circuitry schematic
3.4
LIN
There are footprints for two LIN connections on the xPC56XXMB. By default,
one LIN circuit is assembled (LIN1) and the other circuit is left unpopulated
(LIN2).
Jumper Setting
Effect
1+2 (default)
I/O pins connected to the buttons are pulled up to
logic high
2+3
I/O pins connected to the buttons are pulled down to
logic low