topic Using i3c with i2c in i.MX RT Crossover MCUs

Using i3c with i2c

teruteru5678 — Wed, 05 Feb 2025 01:19:38 GMT

I'm connecting the WM8904 to the I3C bus from the RT685 using the MIMXRT685-EVK and controlling it via I2C. Please tell me about the settings and processing for PUR in that case. [Question] 1) Is it possible to control the WM8904 using only I3CSDA and SCL and use P2_31 PUR as SWO? It seems possible to set it up, but is it okay to set it up like this? 2) When using P2_31 as PUR, is it correct to understand that it's okay to leave P2_31 unconnected as long as SDA is pulled up (e.g. 2.2kΩ)?

Re: Using i3c with i2c

Sam_Gao — Mon, 10 Feb 2025 08:29:45 GMT

@teruteru5678

It is possible about your question if you only want to use I2C instead, also the PUR IO port can be used as SWO if both SCL and SDA are pulled up(R413, R414 is DNP as default) in that time.

Re: Using i3c with i2c

teruteru5678 — Wed, 12 Feb 2025 08:34:56 GMT

Sorry for the late reply.
Thank you for your reply.