I'm having a lot of trouble getting PB00 to behave as expected. I'm trying to set it up as a wakeup interrupt that's pulled down by an external device.
It always shows .8V or so and not a solid high or low.
So far, I have set the following:
32k External clock
PB00 Input, pulled up.
XTAL32K_INJ = 1 (external digital clock)
PB00_AE = 0 to disable analog function on PB00
What am I missing? Is there some sort of limitation on this pin when PB01 is set to XTAL32 IN?
I think I found my answer in AN11996:
It looks like the MCU does not support GPIO usage of XTAL32_OUT pin with square wave clock injection.
Sure would be nice if this was mentioned in the data sheet.