NRF52832-QFAA-R not able to be programmed - nRST line held low for no reason

RE: NRF52832-QFAA-R not able to be programmed - nRST line held low for no reason

ethanharmon — Fri, 06 Sep 2019 14:57:53 GMT

J-link Ultra+

RE: NRF52832-QFAA-R not able to be programmed - nRST line held low for no reason

Jared — Fri, 06 Sep 2019 14:11:45 GMT

Hi,

Weird, seems from your description that the J-link itself was forcing the line down. Thank you for returning with the solution. Could you also share which J-link module you're using?

Best regards

Jared

RE: NRF52832-QFAA-R not able to be programmed - nRST line held low for no reason

ethanharmon — Fri, 06 Sep 2019 13:38:01 GMT

Hello Jared!

I actually got the issue fixed right before I left work. Turns out, for some reason, I had to cut the nRST line to the programmer. After I did this, I was able to program the device, and only then did the device enable its internal pullup on the nRST line. Very weird issue (or intended operation not sure which). So basically I have a button on the nRST line now, but it is NOT connected to the programmer or it won't program.

Thanks for responding to my post!

RE: NRF52832-QFAA-R not able to be programmed - nRST line held low for no reason

Jared — Fri, 06 Sep 2019 12:24:55 GMT

Hi,

Could you share you design files? I can make the case privat if you prefer that.
Are you seeing this issue with more than one custom board?
Which J-link are you using?

Best regards

Jared