AT91M63200-25AI Atmel, AT91M63200-25AI Datasheet - Page 39

• Manufacturer Part Number: AT91M63200-25AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91M63200-25AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 58
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-TQFP, 176-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

AIC: Advanced Interrupt Controller
The AT91M63200 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
interrupts generated by the on-chip peripherals and the
external interrupt request lines: IRQ0 to IRQ3.
Figure 37. 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.
External Interrupt Sources
Internal Interrupt Sources
Advanced Peripheral
FIQ Source
Bus (APB)
Memorization
Memorization
Control
Logic
Prioritization
Controller
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 7 and the AIC pro-
grammable registers in Table 8.
Manager
Manager
NFIQ
NIRQ
AT91M63200
NIRQ
NFIQ
ARM7TDMI
Core
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