Using one IO for power supply, but cannot enter another IO interrupt?

[Diablowaq]

I'm using nrf52832 powerd by a 3.6V regulator in a li-ion powered application. And using one of the IOs (P0.05) as the power supply of other circuits.At the same time, using another IO(P0.06) for the input of a High-level-on IO interrupt.

When setting P0.05 High ,we can enter High-level-on IO interrupt of P0.06 repetedly. But When setting P0.05 Low ,we can enter High-level-on IO interrupt of P0.06 for once.

Do the two IOs have some interference between each other?

[Bjørn Kvaale]

According to the pin assignment for the nrf52832, there should not be an issue with using pins P0.05 & P0.06. As long as your other circuits do not draw more than 1.5 mA, it should be fine to use P0.05 as the power supply (see link). Do you have any relevant code for me to take a look at? Have you tried using two different GPIO pins?

[Diablowaq]

The other circuits draw about 3.5mA from P0.05. Should I set P0.05 into high drive mode？

[Bjørn Kvaale]

You could try that, yes. Just be aware the downsides of using high drive mode (see link).