AT91M40800-33AU データシートの表示（PDF） - Atmel Corporation

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AT91M40800-33AU

AT91 ARM Thumb Microcontrollers

Atmel Corporation 

8.5 User Peripherals

8.5.1

USART: Universal Synchronous/Asynchronous Receiver Transmitter

The AT91M40800 microcontroller provides two identical, full-duplex, universal synchro-

nous/asynchronous receiver/transmitters.

Each USART has its own baud rate generator, and two dedicated Peripheral Data Controller

channels. The data format includes a start bit, up to 8 data bits, an optional programmable parity

bit and up to 2 stop bits.

The USART also features a Receiver Timeout register, facilitating variable length frame support

when it is working with the PDC, and a Time Guard register, used when interfacing with slow

remote equipment.

8.5.2

TC: Timer Counter

The AT91M40800 microcontroller features a Timer Counter block that includes three identical

16-bit timer counter channels. Each channel can be independently programmed to perform a

wide range of functions including frequency measurement, event counting, interval measure-

ment, pulse generation, delay timing and pulse width modulation.

The Timer Counter can be used in Capture or Waveform mode, and all three counter channels

can be started simultaneously and chained together.

12 AT91M40800

1348FS–ATARM–13-Apr-06

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