13.2.1.2 Standby Mode

Standby mode disables most of the clocks of the processor, while keeping it powered up. This reduces the power drawn to the static leakage current, plus a small clock power overhead required to enable the processor to wake up from Standby mode. The transition from Standby mode to Run mode is caused by one of the following:

• the arrival of an interrupt, either masked or unmasked
• the arrival of an event, if standby mode was initiated by a Wait for Event (WFE) instruction
• a debug request, when either debug is enabled or disabled
• a reset.