RM0319 datasheet(360/368 Pages) STMICROELECTRONICS

Nome de Peças	RM0319

Descrição Electrónicos	SPEAr320S architecture and functionality

PDF	368 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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360 / 368 page

Pulse width modulators (PWM)

RM0319

360/368

Doc ID 022640 Rev 3

Pulse width modulators (PWM)

This chapter focuses on PWM functionality and operation.

For technical details about the programmable registers related to the PWM, refer to the

PWM registers in the following companion document:

●

RM0321: SPEAr320S address map and registers

38.1

Overview

The PWM is a pulse-width modulation (PWM) timer module with four independent channels

(PWM1, PWM2, PWM3, and PWM4). All four channels are functionally identical. Using a

16-bit counter, each PWM channel generates a rectangular output pulse with programmable

duty factor (0 to 100%) and frequency.

38.2

Main features

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Four independent PWM channels

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Prescaler (see Control_Reg_x register) to define the input clock frequency to each

timer.

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Programmable duty factor from 0 to 100% ( through Duty_Reg_x register)

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Programmable pulse frequency (through Period_Reg_x register)

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APB slave interface for programming register

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APB clock (PCLK ~ 83 MHz) as the source clock for prescaler

RM0319 Folha de dados(PDF) 360 Page - STMicroelectronics