ST72321BXXX-AUTO datasheet(5/247 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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5 / 247 page

ST72321Bxxx-Auto

Contents

5/247

11.8.2

MCC beep control register (MCCBCR) . . . . . . . . . . . . . . . . . . . . . . . . . 90

12

PWM auto-reload timer (ART) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

12.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

12.2

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

12.2.1

Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

12.2.2

Counter clock and prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

12.2.3

Counter and prescaler initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

12.2.4

Output compare control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

12.2.5

Independent PWM signal generation . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

12.2.6

Output compare and time base interrupt . . . . . . . . . . . . . . . . . . . . . . . . 95

12.2.7

External clock and event detector mode . . . . . . . . . . . . . . . . . . . . . . . . 95

12.2.8

Input capture function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

12.2.9

External interrupt capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

12.3

ART registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

12.3.1

Control/status register (ARTCSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

12.3.2

Counter access register (ARTCAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

12.3.3

Auto-reload register (ARTARR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

12.3.4

PWM control register (PWMCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

12.3.5

Duty cycle registers (PWMDCRx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

12.3.6

Input capture control / status register (ARTICCSR) . . . . . . . . . . . . . . . 101

12.3.7

Input capture registers (ARTICRx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

13

16-bit timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

13.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

13.2

Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

13.3

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

13.3.1

Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

13.3.2

External clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

13.3.3

Input capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

13.3.4

Output compare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

13.3.5

Forced compare output capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

13.3.6

One Pulse mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

13.3.7

Pulse width modulation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

13.4

Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

13.5

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

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