ATSAM3N1BA-AU Просмотр технического описания (PDF) - Atmel Corporation

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ATSAM3N1BA-AU

ARM-based Flash MCU

Atmel Corporation 

SAM3N Summary

5.7 Fast Start-Up

The SAM3N 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 + 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 4 MHz clock and reenables the processor clock.

Figure 5-5. Fast Start-Up Sources

WKUP0

WKUP15

rtc_alarm

RTCEN

rtt_alarm

RTTEN

Falling/Rising

Edge

Detector

FSTT0

Falling/Rising

Edge

Detector

FSTT15

fast_restart

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11011BS–ATARM–22-Feb-12

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