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型號(hào)：	IF280C52EXXX-16SHXXX:RD
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
文件頁(yè)數(shù)：	467/849頁(yè)
文件大?。?/td>	12530K

32099I–01/2012

AT32UC3L016/32/64

23. Pulse Width Modulation Controller (PWMA)

Features

Left-aligned non-inverted 8-bit PWM

Common 8-bit timebase counter

– Asynchronous clock source supported

– Spread-spectrum counter to allow a constantly varying duty cycle

Separate 8-bit duty cycle register per channel

Synchronized channel updates

– No glitches when changing the duty cycles

Interlinked operation supported

– Multiple channels can be updated with the same duty cycle value at a time

– Up to four channels can be updated with different duty cycle values at a time

Interrupt on PWM timebase overflow

Incoming peripheral events supported

– Pre-defined channels support incoming (increase/decrease) peripheral events from the

Peripheral Event System

– Increase event will increase the duty cycle by one

– Decrease event will decrease the duty cycle by one

One output peripheral event supported

– Connected to channel 0 and asserted when the common timebase counter is equal to the

programmed duty cycle for channel 0

Output PWM waveform for each channel

Open drain driving on selected pins for 5V PWM operation

Overview

The Pulse Width Modulation Controller (PWMA) controls several pulse width modulation (PWM)

channels. The number of channels is specific to the device. Each channel controls one square

output PWM waveform. Characteristics of the output PWM waveforms such as period and duty

cycle are configured through the user interface. All user interface registers are mapped on the

peripheral bus.

The duty cycle value for each channel can be set independently, while the period is determined

by a common timebase counter (TC). The timebase for the counter is selected by using the allo-

cated asynchronous Generic Clock (GCLK). The user interface for the PWMA contains

handshake and synchronizing logic to ensure that no glitches occur on the output PWM wave-

forms while changing the duty cycle values.

PWMA duty cycle values can be changed using two approaches, either an interlinked single-

value mode or an interlinked multi-value mode. In the interlinked single-value mode, any set of

channels, up to 32 channels, can be updated simultaneously with the same value while the other

channels remain unchanged. In the interlinked multi-value mode, up to 4 selected channels can

be updated with 4 different values while the other channels remain unchanged.

Some pins can be driven in open drain mode, allowing the PWMA to generate a 5 V waveform

using an external pullup resistor.

相關(guān)PDF資料	PDF描述
MR80C52CXXX-36SHXXX:R	8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQCC44
MQ80C52CXXX-12/883:R	8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQFP44
MQ80C52CXXX-25P883R	8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44
MQ80C52CXXX-25P883R	8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44
MQ80C154-16P883D	8-BIT, 16 MHz, MICROCONTROLLER, CQFP44

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
IF280C52-L16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-12	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-20	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
IF280C52T-25	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller

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