SAM3X8C

Manufacturer Part NumberSAM3X8C
ManufacturerAtmel Corporation
SAM3X8C datasheets

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SAM3A4C PDF datasheetSAM3A4C PDF datasheet #2
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Figure 10-3.
The SysTick calibration value is fixed at 10500, which allows the generation of a time base of
1 ms with SystTick clock to 10.5 MHz (max HCLK/8).
10.7
Watchdog Timer
• 16-bit key-protected once-only Programmable Counter
• Windowed, prevents the processor to be in a dead-lock on the watchdog access
10.8
SysTick Timer
• 24-bit down counter
• Self-reload capability
• Flexible system timer
10.9
Real Time Timer
• Real Time Timer, allowing backup of time with different accuracies
– 32-bit Free-running back-up Counter
– Integrates a 16-bit programmable prescaler running on slow clock
– Alarm Register capable to generate a wake-up of the system
SAM3X/A
SAM3X/A
48
48
Power Management Controller Block Diagram
Master Clock Controller
SLCK
Prescaler
MAINCK
PLLACK
/1,/2,/4,...,/64
UPLL
Programmable Clock Controller
MCK
SLCK
Prescaler
MAINCK
/1,/2,/4,...,/64
PLLACK
UPLL
USB Clock Controller
HSCK
Processor
Clock
HCK
Controller
int
Sleep Mode
Divider
SystTick
/8
FCLK
MCK
Peripherals
Clock Controller
periph_clk[..]
ON/OFF
ON/OFF
pck[..]
ON/OFF
UOTGCK
11057AS–ATARM–10-Feb-12
11057AS–ATARM–10-Feb-12

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