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| 型號(hào)： | IQ80C52EXXX-12D |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQFP44 |
| 封裝： | CERAMIC, QFP-44 |
| 文件頁數(shù)： | 34/108頁 |
| 文件大?。?/td> | 3682K |
| 代理商： | IQ80C52EXXX-12D |
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31
8069R–AVR–06/2013
XMEGA A4
Not recommended for new designs -
Use XMEGA A4U series
16. T/C - 16-bit Timer/Counter
16.1
Features
Five 16-bit Timer/Counters
– Three Timer/Counters of type 0
– Two Timer/Counters of type 1
Three Compare or Capture (CC) Channels in Timer/Counter 0
Two Compare or Capture (CC) Channels in Timer/Counter 1
Double Buffered Timer Period Setting
Double Buffered Compare or Capture Channels
Waveform Generation:
– Single Slope Pulse Width Modulation
– Dual Slope Pulse Width Modulation
– Frequency Generation
Input Capture:
– Input Capture with Noise Cancelling
– Frequency capture
– Pulse width capture
– 32-bit input capture
Event Counter with Direction Control
Timer Overflow and Timer Error Interrupts and Events
One Compare Match or Capture Interrupt and Event per CC Channel
Supports DMA Operation
Hi-Resolution Extension (Hi-Res)
Advanced Waveform Extension (AWEX)
16.2
Overview
XMEGA A4 has five Timer/Counters, three Timer/Counter 0 and two Timer/Counter 1. The dif-
ference between them is that Timer/Counter 0 has four Compare/Capture channels, while
Timer/Counter 1 has two Compare/Capture channels.
The Timer/Counters (T/C) are 16-bit and can count any clock, event or external input in the
microcontroller. A programmable prescaler is available to get a useful T/C resolution. Updates of
Timer and Compare registers are double buffered to ensure glitch free operation. Single slope
PWM, dual slope PWM and frequency generation waveforms can be generated using the Com-
pare Channels.
Through the Event System, any input pin or event in the microcontroller can be used to trigger
input capture, hence no dedicated pins are required for this. The input capture has a noise can-
celler to avoid incorrect capture of the T/C, and can be used to do frequency and pulse width
measurements.
A wide range of interrupt or event sources are available, including T/C Overflow, Compare
match and Capture for each Compare/Capture channel in the T/C.
PORTC and PORTD each has one Timer/Counter 0 and one Timer/Counter1. PORTE has one
Timer/Conter0. Notation of these are TCC0 (Time/Counter C0), TCC1, TCD0, TCD1 and TCE0,
respectively.
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