20.5.1 Enabling I²C Operation

The I²C module is enabled by setting the I2CEN bit (I2CxCON1[15]. The I²C module fully implements all host and client functions. When the module is enabled, the host and client functions are active simultaneously and will respond according to the user software or bus events.

When initially enabled, the module will release the SDAx and SCLx pins, putting the bus into an Idle state. The host functions will remain in an Idle state unless the user software sets the SEN control bit and the data is loaded into the I2CxTRN register. These two actions initiate a host event.

When the host logic is active, the client logic also remains active. Therefore, the client functions will begin to monitor the bus. If the client logic detects a Start event and a valid address on the bus, the client logic will begin a client transaction.