ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 23

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.7
Figure 5-5.
6430D–ATARM–25-Mar-11
Fast Start-Up
Fast Start-Up Sources
WKUP15
WKUP0
WKUP1
The SAM3U 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.
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 4/8/12 MHz clock and reenables the processor clock.
usb_wakeup
Falling/Rising
Falling/Rising
rtc_alarm
rtt_alarm
Falling/Rising
Detector
Detector
Detector
Edge
Edge
Edge
USBEN
RTCEN
RTTEN
FSTT15
FSTT0
FSTT1
Figure
5-5, is fully asynchronous and provides a fast start-
fast_restart
SAM3U Series
23