TWIM troubles on nRF54L15

RE: TWIM troubles on nRF54L15

Sai — Mon, 28 Apr 2025 14:32:36 GMT

Yes. There is no TWIM interface. Use this image as a guideline when selecting interfaces:

krog1 — Mon, 28 Apr 2025 14:03:32 GMT

This is working.

- The TWIM not working on nRF52833 was a red herring; it was an unrelated issue and I got it working.

- I duplicated the issue on a nRF54L15dk board with an eval AS6200 board.

- I moved the SCK and SDA to P1.8 and P1.9 respectively. Works without error.

- It appears that even if SPI00 is disabled, P2.1 isn't available for other functions, like TWIM. Is this the case?

Chris.

krog1 — Tue, 22 Apr 2025 13:58:41 GMT

OK, I will try that. I've also ordered an eval board for the sensor, and I will get it working with the DK to eliminate that variable.

Thanks,

Chris.

Kenneth — Tue, 22 Apr 2025 13:55:07 GMT

Hello,

The first I would recommend it to connect a logic analyzer trace to compare the data written on the i2c bus.

It concerns me that you are not able to make this work on the nRF52833 with twim vs. twi, so I would recommend to start there.

Edit: That said, you should try to enable constant latency mode during the i2c transfer to see how that impact the transfer.

Kenneth