AT91R40807-33AI Atmel, AT91R40807-33AI Datasheet - Page 75

• Manufacturer Part Number: AT91R40807-33AI
• Description: IC ARM7 MCU 176 TQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91R40807-33AI

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Interrupts
User Interface
1354D–ATARM–08/02
Each parallel I/O can be programmed to generate an interrupt when a level change
occurs. This is controlled by the PIO_IER (Interrupt Enable) and PIO_IDR (Interrupt Dis-
able) registers which enable/disable the I/O interrupt by setting/clearing the
corresponding bit in the PIO_IMR. When a change in level occurs, the corresponding bit
in the PIO_ISR (Interrupt Status) is set whether the pin is used as a PIO or a peripheral
and whether it is defined as input or output. If the corresponding interrupt in PIO_IMR
(Interrupt Mask) is enabled, the PIO interrupt is asserted.
When PIO_ISR is read, the register is automatically cleared.
Each individual I/O is associated with a bit position in the Parallel I/O user interface reg-
isters. Each of these registers are 32 bits wide. If a parallel I/O line is not defined, writing
to the corresponding bits has no effect. Undefined bits read zero.
AT91X40 Series
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