ATSAM3N2BA-MU datasheet(39/60 Pages) ATMEL

39 / 60 page

11011BS–ATARM–22-Feb-12

SAM3N Summary

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 through the Shut Down

Controller

10.10 Real Time Clock

• Low power consumption

• Full asynchronous design

• Two hundred year calendar

• Programmable Periodic Interrupt

• Alarm and update parallel load

• Control of alarm and update Time/Calendar Data In

10.11 General Purpose Backup Registers

• Eight 32-bit general-purpose backup registers

10.12 Nested Vectored Interrupt Controller

• Thirty Two maskable external interrupts

• Sixteen priority levels

• Processor state automatically saved on interrupt entry, and restored on

• Dynamic reprioritization of interrupts

• Priority grouping

– selection of pre-empting interrupt levels and non pre-empting interrupt levels

• Support for tail-chaining and late arrival of interrupts

– back-to-back interrupt processing without the overhead of state saving and

restoration between interrupts.

• Processor state automatically saved on interrupt entry and restored on interrupt exit, with no

instruction overhead

ATSAM3N2BA-MU Datasheet(PDF) 39 Page - ATMEL Corporation