11.7.1 I/O Port Operation in Sleep Mode

As the device enters Sleep mode, the system clock is disabled; however, the CN module continues to operate asynchronously. If one of the enabled CN pins changes state, the CNxIF bit (IFSx register) will be set. If the CNxIE bit (IECx register) is set, and its priority is greater than the current CPU priority, the device will wake from Sleep mode and execute the CN Interrupt Service Routine (ISR).

If the assigned priority level of the CN interrupt is less than or equal to the current CPU priority level, the CPU will not be awakened and the device will enter Idle mode.