7.8 Fast Startup

The SAM E70/S70/V70/V71 allows the processor to restart in a few microseconds while the processor is in Wait mode or in Sleep mode. A fast startup can occur upon detection of a low level on any of the following wake-up sources:

• WKUP0 to WKUP13 pins
• Supply Monitor
• RTC alarm
• RTT alarm
• USBHS interrupt line (WAKEUP)
• Processor debug request (CDBGPWRUPREQ)

• GMAC wake on LAN event

  Note: CAN wake-up requires the use of any WKUP0–13 pin.

The fast restart circuitry is fully asynchronous and provides a fast startup signal to the Power Management Controller. As soon as the fast startup signal is asserted, the PMC automatically restarts the Main RC oscillator, switches the Host clock on this clock and re-enables the processor clock.