SAM3S ATMEL [ATMEL Corporation], SAM3S Datasheet - Page 23

• Manufacturer Part Number: SAM3S
• Description: ARM-based Flash MCU
• Manufacturer: ATMEL [ATMEL Corporation]

5.7
6500CS–ATARM–24-Jan-11
Fast Startup
The device 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
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 mas-
ter clock on this 4MHz clock and reenables the processor clock.
Figure 5-5.
WKUP15
WKUP0
WKUP1
Fast Start-Up Circuitry
RTT Alarm
RTC Alarm
USB Alarm
FSTP0
FSTP1
FSTP15
FSTT0
FSTT1
FSTT15
RTTAL
RTCAL
USBAL
Figure
5-5, is fully asynchronous and provides a fast start-
SAM3S Summary
fast_restart
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