參數(shù)資料
型號: AT91R40008-66AI
廠商: Atmel
文件頁數(shù): 5/19頁
文件大小: 0K
描述: IC ARM7 MCU 176 TQFP
標準包裝: 90
系列: AT91
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 66MHz
連通性: EBI/EMI,UART/USART
外圍設備: POR,WDT
輸入/輸出數(shù): 32
程序存儲器類型: ROMless
RAM 容量: 256K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 1.95 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-TQFP
包裝: 托盤
配用: AT91EB40A-ND - KIT EVAL FOR ARM AT91R40008
13
1732FS–ATARM–12-Apr-06
AT91R40008
8.2
User Peripherals
8.2.1
USART: Universal Synchronous/
Asynchronous Receiver Transmitter
The AT91R40008 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 par-
ity bit and up to 2 stop bits.
The USART also features a Receiver Time-out Register, facilitating variable length frame sup-
port when it is working with the PDC, and a Time-guard Register, used when interfacing with
slow remote equipment.
8.2.2
TC: Timer/Counter
The AT91R40008 microcontroller features a Timer/Counter block that includes three identical
16-bit Timer/Counter channels. It is possible to independently program each channel to per-
form a wide range of functions, including frequency measurement, event counting, interval
measurement, 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.
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