Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
33
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
5.6
Wake-up Sources
The wake-up events allow the device to exit the backup mode. When a wake-up event is detected, the Supply
Controller performs a sequence which automatically reenables the core power supply and the SRAM power
supply, if they are not already enabled.
5.7
Fast Start-up
The SAM4S allows the processor to restart in a few microseconds while the processor is in wait mode. A fast start-
up can occur upon detection of a low level on one of the 19 wake-up inputs (WKUP0 to 15 + USB + RTC + RTT).
The fast restart circuitry is fully asynchronous and provides a fast start-up signal to the Power Management
The fast restart circuitry is fully asynchronous and provides a fast start-up signal to the Power Management
Controller. As soon as the fast start-up signal is asserted, the PMC automatically restarts the embedded 4/8/12
MHz Fast RC oscillator, switches the master clock on this 4 MHz clock and reenables the processor clock.