AT91SAM9G45_1 Datasheet, PDF (374/1159 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

27.3 Block Diagram
Figure 27-1. Block Diagram
FIQ
IRQ0-IRQn
Embedded
Pe_Erip_mh_be_era_dlE_dE_ed
P_Eer_mip_bhe_er_da_dl _ed
Peripheral
AIC
Up to
Thirty-two
Sources
APB
ARM
Processor
nFIQ
nIRQ
27.4 Application Block Diagram
Figure 27-2. Description of the Application Block
Standalone
Applications
OS-based Applications
OS Drivers
RTOS Drivers
General OS Interrupt Handler
Hard Real Time Tasks
Advanced Interrupt Controller
Embedded Peripherals
External Peripherals
(External Interrupts)
27.5 AIC Detailed Block Diagram
Figure 27-3. AIC Detailed Block Diagram
FIQ
PIO
Controller
IRQ0-IRQn
PIOIRQ
Embedded
Peripherals
Advanced Interrupt Controller
External
Source
Input
Stage
Fast
Interrupt
Controller
Internal
Source
Input
Stage
Fast
Forcing
Interrupt
Priority
Controller
User Interface
ARM
Processor
nFIQ
nIRQ
Processor
Clock
Power
Management
Controller
Wake Up
APB
372 AT91SAM9G45
6438D–ATARM–13-Oct-09