STC12LE5608AD datasheet(2/377 Pages) STC

2 / 377 page

STC

MCU

Limited

CONTENTS

Chapter 1. Introduction.................................................................7

1.1 Features .................................................................................................. 7

1.2 Block diagram ........................................................................................ 8

1.3 Pin Configurations ................................................................................. 9

1.4 STC12C5620AD series Selection Table................................................11

1.5 STC12C5620AD series Minimum Application System....................... 12

1.6 STC12C5620AD series MCU Typical Application Circuit for ISP..... 13

1.6.1 STC12C5620AD series MCU (28 pin) Typical Application Circuit for ISP...... 13

1.6.2 STC12C5620AD series MCU (20 pin) Typical Application Circuit for ISP...... 15

1.6.3 STC12C5620AD series MCU (32 pin) Typical Application Circuit for ISP...... 17

1.7 Pin Descriptions ................................................................................... 18

1.8 Package Dimension Drawings.............................................................. 20

1.9 STC12C5620AD series MCU naming rules ........................................ 26

1.10 Global Unique Identification Number (ID)........................................ 27

Chapter 2. Clock, Power Management and Reset ....................30

2.1 Clock .................................................................................................... 30

2.1.1 On-Chip R/C Clock and External Crystal/Clcok are Optional in STC-ISP.exe . 30

2.1.2 Divider for System Clock ................................................................................... 31

2.1.3 How to Know Internal RC Oscillator frequency(Internal clock frequency) ...... 32

2.1.4 Programmable Clock Output ............................................................................... 35

2.1.4.1 Timer 0 Programmable Clock-out on P1.0.........................................................................36

2.1.4.2 Timer 1 Programmable Clock-out on P1.1.........................................................................37

2.2 Power Management Modes .................................................................. 38

2.2.1 Slow Down Mode................................................................................................ 39

2.2.2 Idle Mode............................................................................................................. 40

2.2.3 Stop / Power Down (PD) Mode and Demo Program (C and ASM).................... 41

2.3 RESET Sources .................................................................................... 47

2.3.1 RESET Pin........................................................................................................... 47

2.3.2 Software RESET.................................................................................................. 47

2.3.3 Power-On Reset (POR)........................................................................................ 48

2.3.4 MAX810 power-on-Reset delay.......................................................................... 48

2.3.5 Internal Low Voltage Detection Reset ................................................................. 49

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