nRF54LM20 I2C Communication issue

RE: nRF54LM20 I2C Communication issue

VinayKotadamakki — Tue, 26 May 2026 12:46:37 GMT

Hi Vidar,

I have used default BMI270 example, which is used for Arduino I2C Node. Is it possible to modify it as per nRF54LM20B dts compliance?

Please let me know the limitations if not.

Thanks, and regards,

Vinay

VinayKotadamakki — Tue, 26 May 2026 12:19:27 GMT

Hi Vidar,

Thank you for the reply.

We need to configure 2 I2C master bus in nRF54LM20. Is it possible?

thanks and regards,

Vinay

Vidar Berg — Tue, 26 May 2026 10:51:30 GMT

Hello,

If you look at the silkscreen on the backside of the board, you can see that P1.17 and P1.16 are both connected to the on board debugger (VCOMs). To free these pins, you can use the board configurator app and disable VCOM1: https://docs.nordicsemi.com/bundle/ug_nrf54lm20_dk/page/UG/nRF54LM20_DK/hw_desription/board_control.html

VinayKotadamakki — Tue, 26 May 2026 10:46:44 GMT

Is there any default pins we have to use for I2C Communication?

If yes, please let me know which pin we have to use on nRF54LM20 DK.

Thanks, and regards,

Vinay