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參數(shù)資料
| 型號(hào)： | R83C154DTXXX-25D |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 29/108頁 |
| 文件大小： | 3682K |
| 代理商： | R83C154DTXXX-25D |
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27
8069R–AVR–06/2013
XMEGA A4
Not recommended for new designs -
Use XMEGA A4U series
15. I/O Ports
15.1
Features
Selectable input and output configuration for each pin individually
Flexible pin configuration through dedicated Pin Configuration Register
Synchronous and/or asynchronous input sensing with port interrupts and events
– Sense both edges
– Sense rising edges
– Sense falling edges
– Sense low level
Asynchronous wake-up from all input sensing configurations
Two port interrupts with flexible pin masking
Highly configurable output driver and pull settings:
–
Totem-pole
–
Pull-up/-down
–
Wired-AND
–
Wired-OR
–
Bus-keeper
–
Inverted I/O
Optional Slew rate control
Configuration of multiple pins in a single operation
Read-Modify-Write (RMW) support
Toggle/clear/set registers for Output and Direction registers
Clock output on port pin
Event Channel 0 output on port pin 7
Mapping of port registers (virtual ports) into bit accessible I/O memory space
15.2
Overview
The XMEGA A4 devices have flexible General Purpose I/O Ports. A port consists of up to 8 pins,
ranging from pin 0 to pin 7. The ports implement several functions, including synchronous/asyn-
chronous input sensing, pin change interrupts and configurable output settings. All functions are
individual per pin, but several pins may be configured in a single operation.
15.3
I/O configuration
All port pins (Pn) have programmable output configuration. In addition, all port pins have an
inverted I/O function. For an input, this means inverting the signal between the port pin and the
pin register. For an output, this means inverting the output signal between the port register and
the port pin. The inverted I/O function can be used also when the pin is used for alternate
functions.
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