SAM3X datasheet(46/71 Pages) ATMEL

номер детали	SAM3X

подробное описание детали	AT91SAM ARM-based Flash MCU

PDF	71 Pages

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производитель	ATMEL [ATMEL Corporation]

домашняя страница	http://www.atmel.com

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46 / 71 page

11057BS–ATARM–13-Jul-12

SAM3X/A

11057BS–ATARM–13-Jul-12

SAM3X/A

Figure 10-3.

Power Management Controller Block Diagram

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

MCK

periph_clk[..]

int

SLCK

MAINCK

PLLACK

Prescaler

/1,/2,/4,...,/64

HCK

Processor

Clock

Controller

Sleep Mode

Master Clock Controller

Peripherals

Clock Controller

ON/OFF

USB Clock Controller

SLCK

MAINCK

PLLACK

Prescaler

/1,/2,/4,...,/64

Programmable Clock Controller

HSCK

pck[..]

UPLL

UOTGCK

ON/OFF

FCLK

SystTick

Divider

MCK

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