SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 20
SAM3SD8B
Manufacturer Part Number
SAM3SD8B
Description
Manufacturer
Atmel Corporation
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5.7
20
Fast Startup
SAM3S8/SD8 Summary
The SAM3S8/SD8 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
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.
WKUP15
WKUP0
WKUP1
Fast Start-Up Sources
usb_wakeup
Falling/Rising
Falling/Rising
rtc_alarm
rtt_alarm
Falling/Rising
Detector
Detector
Detector
Edge
Edge
Edge
USBEN
RTCEN
RTTEN
Figure
FSTT15
FSTT0
FSTT1
5-5, is fully asynchronous and provides a fast start-
11090AS–ATARM–10-Feb-12
fast_restart
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