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ST72C124J2B6 Datasheet(PDF) 2 Page - STMicroelectronics

No. de pieza ST72C124J2B6
Descripción Electrónicos  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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Table of Contents
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1 PREAMBLE: ST72C334 VERSUS ST72E331 SPECIFICATION . . . . . . . . . . . . . .... . . ... .. . 5
2 GENERAL DESCRIPTION . . . . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . . . . . . 6
2.1 INTRODUCTION . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. . 6
2.2 PIN DESCRIPTION . . .... . ... .. . . ... .. . .... . ... .. .. .. .... . . . ... . . . . . . . . ... 7
2.3 REGISTER & MEMORY MAP . . . .... . . ... .. .... ... . . . . . . . . . . . . . . . . . . . . ... .. 12
2.4 FLASH PROGRAM MEMORY . . . . . . . . . . . . .... . ... .. .. .. .... . . . ... . . . . . . . . . . 16
2.4.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 16
2.4.2 Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4.3 Structural organisation . . . . . . . . . . . . . . .... .... .. . . . . . . . . . . . . . ... .. . .... 16
2.4.4 In-Situ Programming (ISP) mode . . . . . .... . ... .. .. .. .... . . . ... . . . . . . . . . . 16
2.5 PROGRAM MEMORY READ-OUT PROTECTION . . . . . . . . . . . . . . . . . . . .... . . ... .. 16
2.6 DATA EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . .... . ... .. . . ... .. . . . 17
2.6.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 17
2.6.2 Main Features . . . . . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . .... 17
2.6.3 Memory Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... .. . . . . . . . . . . 18
2.6.4 Data EEPROM and Power Saving Modes . . . . . . . . . . . . . .... ... . . . . . . . . . . . . 19
2.6.5 Data EEPROM Access Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.6.6 Register Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 20
3 CENTRAL PROCESSING UNIT . . .... . ... .. . . . . .... .... .. . .... .. . . . . . . ... .. . . . . . 21
3.1 INTRODUCTION . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 21
3.2 MAIN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . . 21
3.3 CPU REGISTERS . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 21
4 SUPPLY, RESET AND CLOCK MANAGEMENT . . . . .... ... . . . . . . . . . . . . . . . . . . . . ... .. 24
4.1 LOW VOLTAGE DETECTOR (LVD) . . . . . . . . . . . . . . .... . . . .... . ... .. . . ... .. . . . 25
4.2 RESET SEQUENCE MANAGER (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .. 26
4.3 CLOCK SECURITY SYSTEM (CSS) . . . . . . . . .... . ... .. . . ... .. . . . . . . ... .. . . ... 32
4.3.1 Clock Filter Control . . .... . ... .. . . . . .... .... .. . . . . . . . . . . . . . ... .. . .... 32
4.3.2 Safe Oscillator Control . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 32
4.4 SUPPLY, RESET AND CLOCK REGISTER DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . 33
4.5 MAIN CLOCK CONTROLLER (MCC) . . . . . . . .... .... .. . . . . . . . . . . . . . ... .. . .... 34
5 INTERRUPTS & POWER SAVING MODES . . . . . . . .... . . . . .. . . . . . . . . . . . . . ... .. . .... 36
5.1 INTERRUPTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.2 POWER SAVING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... 38
5.2.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 38
5.2.2 HALT Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . .... . ... .. . . ... .. . . . 38
5.2.3 WAIT Mode .... ... . ... .. . . ... .. . .... . ... .. . . . . .... . . . . .. . . . . . . . . . . 40
5.2.4 SLOW Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . . 41
6 ON-CHIP PERIPHERALS . . . . . . . . . . . .... . . ... .. .... ... . . . . . . . . . . . . . . . . . . . . ... .. 42
6.1 I/O PORTS . . . . . . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 42
6.1.1 Introduction . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . ... .. .. . . . . . . 42
6.1.2 Functional Description . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 42
6.1.3 I/O Port Implementation . . . . . . . . . . . . . . . . . . . .... . . . .... .... .. . .... .. . . . 44
6.1.4 Register Description . . . . . . .... . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. 45
6.2 MISCELLANEOUS REGISTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.2.1 I/O Port Interrupt Sensitivity Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47


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