18.3.1.3 Idle Mode

In the Idle mode, all active peripherals can be clocked but the CPU core is clock gated off and no code is executed. This mode can be useful for applications that only require the processor to run when an interrupt occurs.

The device enters the Idle mode, when the OSCCON.SLPEN bit is low and the CPU executes a WFI instruction.

Note: When exiting from Standby Sleep mode, the CRU transitions the system to the Idle mode before transitioning to the RUN mode. This transition to the Idle mode is used to support the Dream mode and always occurs regardless of the CRU transitioning to the Dream mode or the Run mode. Therefore, when exiting the Standby Sleep mode, both the RCON.SLEEP and RCON.IDLE bits are going to be set.