AT91M40400-25C ATMEL Corporation, AT91M40400-25C Datasheet - Page 34
AT91M40400-25C
Manufacturer Part Number
AT91M40400-25C
Description
16/32-bit Microcontroller, 2.7V to 3.6V Operating Range
Manufacturer
ATMEL Corporation
Datasheet
1.AT91M40400-25C.pdf
(116 pages)
- Current page: 34 of 116
- Download datasheet (2Mb)
AIC: Advanced Interrupt Controller
The AT91M40400 has an 8-level priority, individually
maskable, vectored interrupt controller. This feature sub-
stantially reduces the software and real time overhead in
handling internal and external interrupts.
The interrupt controller is connected to the NFIQ (fast inter-
rupt 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
Figure 32. Interrupt Controller Block Diagram
Note: 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.
34
External Interrupt Sources
Internal Interrupt Sources
Advanced Peripheral
AT91M40400
FIQ Source
Bus (APB)
Memorization
Memorization
Control
Logic
Controller
Priority
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 sen-
sitive.
The interrupt sources are listed in Table 5 and the AIC pro-
grammable registers in Table 6.
Manager
Manager
NFIQ
NIRQ
NIRQ
NFIQ
ARM7TDMI
Core
Related parts for AT91M40400-25C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: