CONTENTS

S.No TOPIC Page No.ACKNOWLEDMENTS iABSTRACT iiLIST OF FIGURES iiiLIST OF TABLES vCHAPTER -1 INTRODUCTION 1

1.1 Introduction of Smart mouse Using MEMS Sensor 1CHAPTER -2 GENERAL THEORY 3 2.1 Microcontroller 3

2.1.1 AT89S51 3 2.1.2 AT89S51 Architecture 4 2.1.3 Pin description 4 2.2 The 8051 Oscillator and clock 8 2.3 Memories 8 2.3.1 Types of memory 8

2.3.2 Special function registered memory 9 2.4 Power supply 13

2.4.1 Block diagram and circuit diagram 13 2.4.2 Transformers 13 2.4.3 Rectifier 14 2.4.4 Filter Capacitor 16 2.4.5 Voltage regulator 17

2.5 MEMS Sensor 182.5.1 Description 182.5.2 Pin Function 192.5.3 Features 192.5.4 Typical Applications 20

2.6 RS-232 202.6.1 RS- 232 voltage levels 212.6.2 RS-232 level converter 212.6.3 Serial communication 22

2.7 Embedded Systems 242.7.1 Introduction 242.7.2 System design calls 252.7.3 Embedded system design cycle 262.7.4 Characteristics of Embedded system 26

2.7.5 Applications 272.7.6 Classification 27

CHAPTER -3 HARDWARE DISCRIPTION 28 3.1 Block diagram Of Smart Mouse Using MEMS Sensor 28 3.2 Over view of Block Diagram 28 3.2.1 Microcontroller 28 3.2.2 Power supply 29 3.2.3 MEMS sensor 29 3.2.4 Analog to Digital converter 30 3.2.5 Liquid Crystal Display 34 3.2.6 LED Interfacing 42 3.3 Schematic Diagram of MEMS Based Smart Mouse 43

CHAPTER -4 SOFTWARE DISCRIPTION 44 4.1 Keil Software 44 4.1.1 Keil compiler setup 44 4.2 Source Code 51

CHAPTER -5 RESULT ANALYSIS 57 5.1 Specifications of Smart Mouse Using MEMS Sensor 57 5.2 Smart Mouse Using MEMS Sensor when Power supply OFF 57

5.3 Smart Mouse Using MEMS Sensor Power supply Unit 58 5.4 Smart Mouse Using MEMS Sensor when Power supply ON 58 ADVANTAGES & DISADVANTAGES 59APPLICATIONS 60CONCLUSIONS 61FUTURE SCOPE 62REFERENCES 63

LIST OF FIGURES

FIGURE No. NAME OF THE FIGURE PAGE No.

Figure:1.1. Using MEMS 2

Figure:2.1. AT89S51 3

Figure:2.2. Pin Diagram of 8051 6

Figure:2.3. Block Diagram of Microcontroller 7

Figure:2.4. Oscillator and Timing circuit 8

Figure:2.5. Block Diagram of power supply 13

Figure;2.6. Circuit Diagram of power supply 13

Figure:2.7. Transformer 14

Figure:2.8. Half wave Rectifier 15

Figure:2.9. Full wave Rectifier 15

Figure:2.10. Full wave Bridge Rectifier 16

Figure:2.11. Centre taped Transformer 16

Figure:2.12. Filter capacitor 17

Figure:2.13. Voltage regulator 18

Figure:2.14 MEMS IC 19

Figure:2.15. TTL/CMOS Serial logic waveform 21

Figure:2.16. RS-232 Logic Waveform 21

Figure:2.17. Pin & Functional Diagram of RS-232 22

Figure:2.18. Serial communication 23

Figure:2.19. Pin Functionality of DB-9 24

Figure:2.20. Embedded system design calls 25

Figure:2.21. V Diagram 26

Figure:3.1. Block Diagram 28

Figure:3.2. Digital Ramp ADC 31

Joginpally B.R Engineering College iii

Figure:3.3. ADC0808 32

Figure:3.4. Block Diagram of ADC 33

Figure:3.5. Timing Diagram 33

Figure:3.6. LCD Display 34

Figure:3.7. LCD Screen Circuit 36

Figure:3.8. LCD interfacing with the microcontroller 40

Figure:3.9. Procedure on 8-bit initialization 41

Figure:3.10. LED interfacing with the microcontroller 42

Figure:3.11. Schematic Diagram of Smart Mouse Using MEMS Sensor 43

Figure:5.1. Smart Mouse Using MEMS Sensor when Power supply OFF 57

Figure:5.2. Smart Mouse Using MEMS Sensor Power supply unit 58

Figure:5.3. Smart Mouse Using MEMS Sensor when Power supply ON 58

Joginpally B.R Engineering College iv

LIST OF TABLES

TABLE No. NAME OF THE TABLE PAGE No.

Table:2.1. Port 1 Description 5

Table:2.2. Port 3 Description 5

Table:5.1. Specifications of Smart Mouse Using MEMS Sensor 57

Joginpally B.R Engineering College v