MCC 128, which I2C bus is being used by MCC128 hat.

[GUosong]

Raspberry 4B, it has 6 off I2C bus. 

Could you please which ones are used by MCC128?

Could I use the ones which are not used by MCC128?

Thanks

[DAQman]

The MCC 128 EEPROM uses a unique ID version of the I2C bus, which is unavailable during normal operations. We do have one board that uses I2C1, and it is the MCC 152. If you don't plan to use it, the six I2C buses are available unless they use a resource assigned to the MCC 128. The resources can be found under the Interface Specifications section in the following document: https://mccdaq.github.io/daqhats/_static/esmcc128.pdf