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ATXMEGA128A1-AU Scheda tecnica(PDF) 30 Page - ATMEL Corporation |
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ATXMEGA128A1-AU Scheda tecnica(HTML) 30 Page - ATMEL Corporation |
30 / 99 page 30 8067I–AVR–04/09 XMEGA A1 14.4 Input sensing • Sense both edges • Sense rising edges • Sense falling edges • Sense low level Input sensing is synchronous or asynchronous depending on the enabled clock for the ports, and the configuration is shown in Figure 14-7 on page 30. Figure 14-7. Input sensing system overview When a pin is configured with inverted I/O the pin value is inverted before the input sensing. 14.5 Port Interrupt Each ports have two interrupts with seperate priority and interrupt vector. All pins on the port can be individually selected as source for each of the interrupts. The interrupts are then triggered according to the input sense configuration for each pin configured as source for the interrupt. 14.6 Alternate Port Functions In addition to the input/output functions on all port pins, most pins have alternate functions. This means that other modules or peripherals connected to the port can use the port pins for their functions, such as communication or pulse-width modulation. “Pinout and Pin Functions” on page 49 shows which modules on peripherals that enables alternate functions on a pin, and what alternate functions that is available on a pin. INVERTEDI/O Interrupt Control IREQ Event Pn D Q R D Q R Synchronizer INn EDGE DETECT Asynchronous sensing Synchronous sensing EDGE DETECT |
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