SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 37
SAM3SD8B
Manufacturer Part Number
SAM3SD8B
Description
Manufacturer
Atmel Corporation
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10.9
10.10 Real Time Clock
10.11 General-Purpose Backed-up Registers
10.12 Nested Vectored Interrupt Controller
11090AS–ATARM–10-Feb-12
Real-Time Timer
• Real-Time Timer, allowing backup of time with different accuracies
• Low power consumption
• Full asynchronous design
• Two hundred year Gregorian and Persian calendar
• Programmable Periodic Interrupt
• Trimmable 32.7682 kHz crystal oscillator clock source
• Alarm and update parallel load
• Control of alarm and update Time/Calendar Data In
• Waveform output capability on GPIO pins in low power modes
• Eight 32-bit backup general-purpose registers
• Thirty maskable external interrupts
• Sixteen priority levels
• Processor state automatically saved on interrupt entry, and restored on
• Dynamic reprioritizing of interrupts
• Priority grouping.
• Support for tail-chaining and late arrival of interrupts.
• Processor state automatically saved on interrupt entry, and restored on interrupt exit, with no
instruction overhead.
– 32-bit Free-running backup 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
– selection of pre-empting interrupt levels and non pre-empting interrupt levels.
– back-to-back interrupt processing without the overhead of state saving and
Controller
restoration between interrupts.
SAM3S8/SD8 Summary
37
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