24.7.2 Sleep in Target Mode Operation

In Target mode, incoming SCL is used to receive or transmit data. However, it uses the I³C peripheral clock to run the state machine of the Target to transmit and receive data from the application.

When operating in Target mode and the device is put into Sleep, the I³C peripheral clock will not run the Target state machine.

The I³C module does not function in Target mode operation while the device is in Sleep.

There is no automatic way to prevent sleep entry if a transmission or reception is pending. The user software must synchronize sleep entry with I³C operation to avoid aborted transmissions. It is highly recommended to restart the I³C communication after exiting Sleep mode.

If the module clocks are suspended in Sleep mode while having Target mode active, the module will most likely need to be re-enabled to synchronize it back up with the I³C bus activity.