Multi-master I2C on 52833

[rolandash]

Hi,

I am working on a project that uses nrf52833 as one of I2C master to communicate with few I2C slave devices. Meanwhile there is another MCU (stm32H7) on the same bus as the second master that also talking to one of the slave device. 

The hardware works fine when either 52833 or sttm32H7 is connected to the bus separately, i.e., each MCU is powered off when not used. However when both of them are powered on, 52833 I2C communication hangs up.

As I can see that per I2C protocol specification multi-master use case is supported. So my question is does 52833 I2C hardware support multiple-master application?

Thank you.

/Roland

[Hung Bui]

Hi Roland,

If you have a look at the product specification you can find that the TWI master on the nRF52 doesn't support multi master unfortunately: 

[rolandash]

thanks for the clarification. I need to sort out other way then.