ATSAM3S datasheet(23/65 Pages) ATMEL

Teilenummer	ATSAM3S

Bauteilbeschribung	AT91 ARM Cortex M3-based Processor

PDF	65 Pages

Scroll/Zoom	100%

Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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23 / 65 page

6500AS–ATARM–11-Dec-09

SAM3S Summary

5.7

Fast Startup

The SAM3S allows the processor to restart in a few microseconds while the processor is in wait

mode or in sleep mode. A fast start up can occur upon detection of a low level on one of the 19

wake-up inputs (WKUP0 to 15 + SM + RTC + RTT).

The fast restart circuitry, as shown in Figure 5-5, 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 MHz fast RC oscillator, switches the master

clock on this 4MHz clock and reenables the processor clock.

Figure 5-5.

Fast Start-Up Sources

RTCEN

rtc_alarm

RTTEN

rtt_alarm

USBEN

usb_wakeup

fast_restart

WKUP15

FSTT15

WKUP1

WKUP0

FSTT0

FSTT1

Falling/Rising

Edge

Detector

Falling/Rising

Edge

Detector

Falling/Rising

Edge

Detector

ATSAM3S Datenblatt(PDF) 23 Page - ATMEL Corporation