AT91FR40162SB-CU-999 Atmel, AT91FR40162SB-CU-999 Datasheet - Page 76

• Manufacturer Part Number: AT91FR40162SB-CU-999
• Description: IC MCU 32BIT RISC 121BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91FR40162SB-CU-999

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 75MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 2MB (1M x 16)
• Program Memory Type: FLASH
• Ram Size: 256K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 121-BGA
• Data Bus Width: 32 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

14. AIC: Advanced Interrupt Controller
14.1
Figure 14-1. Advanced Interrupt Controller Block Diagram
Note:
76
Block Diagram
After a hardware reset, the AIC pins are controlled by the PIO Controller. They must be configured to be controlled by the
peripheral before being used.
External Interrupt Sources
Internal Interrupt Sources
AT91FR40162SB
Advanced Peripheral
FIQ Source
Bus (APB)
The AT91FR40162SB has an 8-level priority, individually maskable, vectored interrupt control-
ler. This feature substantially reduces the software and real-time overhead in handling internal
and external interrupts.
The interrupt controller is connected to the NFIQ (fast interrupt request) and the NIRQ (standard
interrupt request) inputs of the ARM7TDMI processor. The processor’s NFIQ line can only be
asserted by the external fast interrupt request input: FIQ. The NIRQ line can be asserted by the
interrupts generated by the on-chip peripherals and the external interrupt request lines: IRQ0 to
IRQ2.
The 8-level priority encoder allows the customer to define the priority between the different NIRQ
interrupt sources.
Internal sources are programmed to be level sensitive or edge triggered. External sources can
be programmed to be positive or negative edge triggered or high- or low-level sensitive.
The interrupt sources are listed in
Table 14-3 on page
Memorization
Memorization
Control
Logic
84.
Table 14-1 on page 77
Controller
Priority
Manager
Manager
NFIQ
NIRQ
and the AIC programmable registers in
NIRQ
NFIQ
ARM7TDMI
6410B–ATARM–12-Jan-10
Core