nRF52832_QFAA problem with NFC pins

RE: nRF52832_QFAA problem with NFC pins

maxishev — Tue, 15 Aug 2017 05:32:36 GMT

Ok, we will try it

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Mon, 14 Aug 2017 15:33:01 GMT

Since you say you do not see this on our DK, or on your other custom board, and you cannot see this with the nRF52 chip desolidered, it would be interesting to see if this happens with another chip solidered, or on another custom board of the same layout.

RE: nRF52832_QFAA problem with NFC pins

maxishev — Mon, 14 Aug 2017 13:43:49 GMT

We don't have muiltiple board for this project. And we didn't tried to solder different chip. Is this can be the issue?

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Mon, 14 Aug 2017 13:41:38 GMT

Do you have multiple boards for the project that experience this issue, or only the one? Have you tried soldering different chip?

RE: nRF52832_QFAA problem with NFC pins

maxishev — Sun, 30 Jul 2017 06:46:09 GMT

No, they have different boards.

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Fri, 28 Jul 2017 09:16:07 GMT

Are both projects running on the same custom board?

RE: nRF52832_QFAA problem with NFC pins

maxishev — Thu, 27 Jul 2017 15:13:05 GMT

Yes, we have 2 projects with this chip. At one project this IO works ok as needed. And at other project - that I described - we have the issue.

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Thu, 27 Jul 2017 13:31:11 GMT

Have you tested this on multiple custom boards? Do they all show the same issue?

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Thu, 27 Jul 2017 13:13:22 GMT

When you tested on the DK, did you desolder R25-R26 and solder these to R27-R28? If not, P0.09/P0.10 are not connected to the pin header, and is connected to GND through C42/C43.

RE: nRF52832_QFAA problem with NFC pins

maxishev — Tue, 25 Jul 2017 14:36:18 GMT

Yes we tried. As I described at the topic - the IO rise with board power-up.

Here are screenshot of this: http://imgur.com/a/UzDHE

Where the yellow signal is 3.3V power; green signal indicate when the SW at nRF start to work; and blue is the problematic IO. We can see that with start of SW work the IO get down to 0 because here he get configuration of IO. But until it - from power-up to this point - IO is "1"

Thank you

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Tue, 25 Jul 2017 13:14:49 GMT

Sorry, I missed that. Have you tried different projects/examples on the board, to make sure it is not something in your code settings the pins high?

RE: nRF52832_QFAA problem with NFC pins

maxishev — Mon, 24 Jul 2017 14:24:38 GMT

As I described at main topic - at DK we don't see this issue, only at our board. So why this can happened?

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Mon, 24 Jul 2017 13:23:05 GMT

I'm not able to reproduce this on the nRF52 DK (PCA10040). Are you able to reproduce this issue on our DK, or just on your custom board?

RE: nRF52832_QFAA problem with NFC pins

maxishev — Mon, 24 Jul 2017 07:22:07 GMT

Yes, I did

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Mon, 24 Jul 2017 07:20:50 GMT

Did you read and check the UICR register, to verify that it actually have the "disable" setting set?

RE: nRF52832_QFAA problem with NFC pins

maxishev — Sun, 23 Jul 2017 05:28:07 GMT

Yes, we configured it as needed - it still the same issue.

Thank you

RE: nRF52832_QFAA problem with NFC pins

Jørgen Holmefjord — Fri, 21 Jul 2017 09:01:45 GMT

Please check that the UICR register NFCPINS is set to disable. You can configure NFCT pins as GPIOs by defining the symbol CONFIG_NFCT_PINS_AS_GPIOS, as described in the important section on this page.