ST72321BXXX-AUTO datasheet(92/247 Pages) STMICROELECTRONICS

Part #	ST72321BXXX-AUTO

Description	8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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PWM auto-reload timer (ART)

ST72321Bxxx-Auto

92/247

12

PWM auto-reload timer (ART)

12.1

Introduction

The Pulse Width Modulated Auto-Reload Timer on-chip peripheral consists of an 8-bit auto-

reload counter with compare/capture capabilities and of a 7-bit prescaler clock source.

These resources allow five possible operating modes:

●

Generation of up to 4 independent PWM signals

●

Output compare and Time base interrupt

●

Up to 2 input capture functions

●

External event detector

●

Up to 2 external interrupt sources

The three first modes can be used together with a single counter frequency.

The timer can be used to wake up the MCU from Wait and Halt modes.

Figure 35.

PWM auto-reload timer block diagram

OVF INTERRUPT

EXCL

CC2

CC1

CC0

TCE

FCRL

OIE

OVF

ARTCSR

fINPUT

PWMx

PORT

FUNCTION

ALTERNATE

OCRx

COMPARE

REGISTER

PROGRAMMABLE

PRESCALER

ARR

REGISTER

ICRx

REGISTER

LOAD

OPx

POLARITY

CONTROL

OEx

PWMCR

MUX

fCPU

DCRx

REGISTER

LOAD

fCOUNTER

ARTCLK

fEXT

ARTICx

ICFx

ICSx

ICCSR

LOAD

ICx INTERRUPT

ICIEx

INPUT CAPTURE

CONTROL

8-BIT COUNTER

(CAR REGISTER)

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ST72321BXXX-AUTO Datasheet(PDF) 92 Page - STMicroelectronics

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