P0.09 and P0.10 on nRF52810

[Adriana]

Hi,

I'm developing on nrf52810 using the SDK14.1.0 and I've take as starting point a template application that targets nRF52810 running on the nRF52 Development Kit. But I'm working on nrf52810 hardware, NOT the nrf52DK, so I've made preprocessor and startup files adjustments as indicated in documentation.

I want to use P0.09 as digital output and I've read many questions about using this pins as GPIO instead of NFC. I understand the issue when using nrf52DK and default settings in SDK, but nrf52810 has no support for NFC so I think this pins should be default configured as GPIO.

For testing I'm generating a clock signal which is properly driven through pins P0.28, P0.30 and P0.12.

What's missing?

Thanks!

[MartinBL]

Hi,

The NFC pins on the nRF52 are actually physically disconnected from the header pins (P0.09 and P0.10) along the sides of the kit.

You need to desolder R25 and R26 and short R27 and R28 to disconnect the NFC contact and connect P0.09 and P0.10 to the nRF52.

[MartinBL]

My apologies, I forgot about that.

Anyway. I did a quick test of pin 9 and 10 on an nRF52810 myself. I based my test on the SDK_14.1.0\examples\peripheral\uart\pca10040e example. I removed all the UART stuff and simply toggled pin 9 and 10 in 1 second intervals. It seems to work fine. No special porting was required. Can you try this hex file that works on my kit? nrf52810_xxaa_nfc_toggle_test.hex

How are you generating your clock signal? Are you using GPIOTE and PPI for example? Can you upload a hex file or code that I can try?

[Kautham]

Hi I have been having the same problem. So i tried setting the pin 9  high and measured the output voltage to be 0.6 volts. Which is pretty low to power up or drive a peripheral. Have you found out any solution for this ?. this is my question related to this