What does the IF BOOT/RESET button reset on the PCA10040?

RE: What does the IF BOOT/RESET button reset on the PCA10040?

Ladasky — Sat, 23 Mar 2019 04:44:04 GMT

Thanks for your reply, Stian. We are using hardware flow control on the nRF52, consistent with all of Nordic's example UART code that I have seen. I have not investigated the possibility that software flow control would correct the UART problems I have had in the past.

And thanks for pointing me at the breakout for P0.21 on P6, it's out of numerical order and I was looking all over for it. I don't necessarily need to follow the Arduino pin conventions.

RE: What does the IF BOOT/RESET button reset on the PCA10040?

Stian Røed Hafskjold — Fri, 22 Mar 2019 15:49:13 GMT

Hi, the IF BOOT/RESET button just asserts the P0.21 button. So you should be fine just pulling P0.21 to GND using an external button.

P0.21 has an internal pull-up so the only thing you need to do in order to reset the nRF52 is to pull this line to GND momentarily.

P0.21 is already wired out through the P6 header so you can just use this header instead of shorting SB17.

May I ask whether or not you are using HWFC on the nRF52 chip?