ST7FLI49MK1T6 datasheet(3/188 Pages) STMICROELECTRONICS

Il numero della parte	ST7FLI49MK1T6

Spiegazioni elettronici	8-bit MCU with single voltage Flash memory data EEPROM, ADC, 8/12-bit timers, and I짼C interface

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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3 / 188 page

ST7LITE49M

Contents

3/188

6

Central processing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.2

Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.3

CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.3.1

Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.3.2

Index registers (X and Y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.3.3

Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.3.4

Condition Code register (CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.3.5

Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7

Supply, reset and clock management . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.1

RC oscillator adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.1.1

Internal RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.1.2

Auto Wake Up RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.2

Multi-oscillator (MO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2.1

External clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2.2

Crystal/ceramic oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2.3

Internal RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.3

Reset sequence manager (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.3.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.3.2

Asynchronous External RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.3.3

External Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.3.4

Internal Low Voltage Detector (LVD) Reset . . . . . . . . . . . . . . . . . . . . . . 40

7.3.5

Internal Watchdog Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.4

System integrity management (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.4.1

Low Voltage Detector (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.4.2

Auxiliary Voltage Detector (AVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

7.4.3

Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

7.5

Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7.5.1

Main Clock Control/Status register (MCCSR) . . . . . . . . . . . . . . . . . . . . 45

7.5.2

RC Control register (RCCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7.5.3

AVD Threshold Selection register (AVDTHCR) . . . . . . . . . . . . . . . . . . . 46

7.5.4

CLOCK Controller Control/Status register (CKCNTCSR) . . . . . . . . . . . 47

7.5.5

System Integrity (SI) Control/Status register (SICSR) . . . . . . . . . . . . . . 47

8

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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