參數(shù)資料
型號: AT91M40807-33AI
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: Microcontroller
中文描述: 32-BIT, MROM, 33 MHz, RISC MICROCONTROLLER, PQFP100
封裝: 1.40 MM HEIGHT, TQFP-100
文件頁數(shù): 75/153頁
文件大小: 1837K
代理商: AT91M40807-33AI
75
AT91X40 Series
1354D
ATARM
05/02
Interrupts
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.
User Interface
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.
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