58.9.2.3 Idle Mode Operation

The purpose of Idle mode is to optimize power consumption of the device versus response time. In this mode, only the processor clock is stopped. The peripheral clocks, including the DDR controller clock, can be enabled. The current consumption in this mode is application-dependent.

This mode is entered via the Wait for Interrupt (WFI) instruction and CPU_CLK disabling.

The processor can be awakened from an interrupt. After a few CPU_CLK cycles, the system resumes where it was before entering WFI mode.