Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Scheda Tecnica
Codici prodotto
AT91SAM9N12-EK
123
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
15.3
Block Diagram
Figure 15-1. RTC Block Diagram
15.4
Product Dependencies
15.4.1 Power
Management
The Real-time Clock is continuously clocked at 32768 Hz. The Power Management Controller has no effect on RTC
behavior.
behavior.
15.4.2 Interrupt
Within the System Controller, the RTC interrupt is OR-wired with all the other module interrupts.
Only one System Controller interrupt line is connected on one of the internal sources of the interrupt controller.
RTC interrupt requires the interrupt controller to be programmed first.
When a System Controller interrupt occurs, the service routine must first determine the cause of the interrupt. This is
done by reading each status register of the System Controller peripherals successively.
done by reading each status register of the System Controller peripherals successively.
Bus Interface
32768 Divider
Time
Slow Clock: SLCK
Bus Interface
Date
RTC Interrupt
Entry
Control
Interrupt
Control