Analog and digital circuits for electronic control system applications using the TI MSP430 microcontroller

Today's control system designers face an ever-increasing "need for speed" and accuracy in their system measurements and computations. New design approaches using microcontrollers and DSP are emerging, and designers must understand these new approaches, the tools available, and how best to apply them.

This practical text covers the latest techniques in microcontroller-based control system design, making use of the popular MSP430 microcontroller from Texas Instruments.

The book covers all the circuits of the system, including:
· Sensors and their output signals
· Design and application of signal conditioning circuits
· A-to-D and D-to-A circuit design
· Operation and application of the powerful and popular TI MSP430 microcontroller
· Data transmission circuits
· System power control circuitry

Written by an experienced microcontroller engineer and textbook author, the book is lavishly illustrated and includes numerous specific circuit design examples, including a fully tested and documented hands-on project using the MSP430 that makes use of the principles described. For students, engineers, technicians, and hobbyists, this practical text provides the answers you need to design modern control systems quickly and easily.

Author Notes

Gerald (Jerry) Luecke has almost 50 years experience in the design of semiconductor discrete-component and integrated circuits, 32 of which were spent at Texas Instruments

Foreword	p. xi
Preface	p. xii
Acknowledgments	p. xiii
What's on the CD-ROM?	p. xiv
Chapter 1 Signal Paths from Analog to Digital	p. 1
Introduction	p. 1
A Refresher	p. 1
Accuracy vs. Speed-Analog and Digital	p. 5
Interface Electronics	p. 6
The Basic Functions for Analog-to-Digital Conversion	p. 6
Summary	p. 8
Chapter 1 Quiz	p. 9
Chapter 2 Signal Paths from Digital to Analog	p. 11
Introduction	p. 11
The Digital-to-Analog Portion	p. 11
Filtering	p. 13
Conditioning the Signal	p. 13
Transducing the Signal	p. 13
Summary	p. 15
Chapter 2 Quiz	p. 16
Chapter 3 Sensors	p. 18
Introduction	p. 18
Temperature Sensors	p. 18
Angular and Linear Position	p. 21
Rotation	p. 24
Magnetoresistor Sensor	p. 24
Pressure	p. 25
Light Sensors	p. 27
Other Sensors	p. 32
Summary	p. 32
Chapter 3 Quiz	p. 32
Chapter 4 Signal Conditioning	p. 35
Introduction	p. 35
Amplification	p. 35
Bipolar NPN Amplifier	p. 36
Amplifier Frequency Response	p. 39
Coupling	p. 40
Small-Signal vs. Large Signal	p. 41
Classes of Amplifiers	p. 42
Field-Effect Transistor Amplifiers	p. 42
A N-Channel JFET Amplifier Design	p. 43
An NPN MOSFET Amplifier	p. 45
Operational Amplifiers	p. 47
Conditioning the Output of a Pressure Sensor	p. 50
A More Sophisticated Pressure Sensor Amplifier	p. 51
Current Mirror	p. 52
Applications of Op Amps	p. 53
Oscillators	p. 53
Power Amplifiers	p. 54
Class B Audio Power Amplifier	p. 56
Special Signals	p. 56
RC Time Constants	p. 58
Frequency Selection	p. 59
Typical Application of Filters	p. 61
Summary	p. 62
Chapter 4 Quiz	p. 62
Chapter 5 Analog-to-Digital and Digital-to-Analog Conversions	p. 66
Introduction	p. 66
Decimal Equivalent of a Binary Number	p. 67
Digital Codes of ADC	p. 67
A Resistor Network DAC	p. 68
A Simple Resistor-String DAC	p. 71
A Simple Current-Steering DAC	p. 72
Analog-to-Digital Converters (ADC)	p. 73
Successive Approximation Register (SAR) ADC	p. 74
Capacitor Charge-Redistribution ADC	p. 75
Highest Speed Conversions	p. 78
Sample and Hold and Filters	p. 78
Summary	p. 79
Chapter 5 Quiz	p. 80
Chapter 6 Digital System Processing	p. 82
Introduction	p. 82
Digital Processor or Digital Computer	p. 82
What is a Microprocessor?	p. 86
What is a Microcomputer?	p. 86
System Clarifications	p. 86
Digital Signal Representations	p. 90
Clock, Timing and Control Signals	p. 90
Interrupts	p. 92
Status Bits	p. 92
More About Software	p. 93
Sophisticated Programming Languages	p. 95
How Parts of a Processor Perform Their Functions	p. 95
Memory and Input/Output	p. 97
Addressing Modes	p. 97
Summary	p. 99
Chapter 6 Quiz	p. 100
Chapter 7 Examples of Assembly-Language Programming	p. 103
Introduction	p. 103
A Processor for the Examples	p. 103
About the MSP430 Family	p. 103
The CPU	p. 104
Program Memory and Data Memory	p. 105
Peripherals	p. 106
Operation Control and Operating Modes	p. 106
Watchdog Timer	p. 106
System Reset	p. 107
Interrupts	p. 107
Oscillators and Clock Generators	p. 107
Timers	p. 109
Addressing Modes	p. 109
More on MSP430 Control	p. 110
Further Thoughts	p. 114
Labels	p. 117
Instructions	p. 117
Operands	p. 117
Hexadecimal Numbers	p. 117
Comments	p. 118
Programming Examples	p. 118
Subprogram No. 1	p. 118
Subprogram No. 2	p. 127
Subprogram No. 3	p. 131
Variation of Threshold	p. 137
Summary	p. 137
Chapter 7 Quiz	p. 138
Chapter 8 Data Communications	p. 142
Introduction	p. 142
The Data Transmission System	p. 142
Parallel and Serial Transmission	p. 142
Protocols	p. 144
High-Speed Data Transmissions	p. 145
Serial Data Communications Advances	p. 145
A Return to the Format	p. 145
Shift Registers	p. 147
USART Serial Communications	p. 148
The UART Function with Software	p. 150
Technology Advances	p. 150
I[superscript 2]C Protocol	p. 150
USB	p. 152
Summary	p. 156
Chapter 8 Quiz	p. 157
Chapter 9 System Power and Control	p. 160
Introduction	p. 160
Voltage Regulators	p. 161
Load Variations	p. 162
Actual Linear Voltage Regulator Circuit	p. 163
Voltage Regulation	p. 163
Power Dissipation	p. 164
Switching Voltage Regulators	p. 165
Summary of Regulators	p. 167
Power Supply Distribution	p. 168
Power System Supervisors	p. 170
Summary	p. 171
Chapter 9 Quiz	p. 171
Chapter 10 A Microcontroller Application	p. 174
Introduction	p. 174
Application Block Diagram	p. 174
System Schematic	p. 177
The Display	p. 177
The Microcontroller	p. 179
The Analog Circuitry	p. 180
JTAG	p. 181
Summary of Schematic	p. 182
System Development	p. 182
Breadboard Construction-Powered by the PC	p. 185
The Display Board	p. 189
The Analog Board	p. 190
The Application Program	p. 191
Creating a Project in IAR Workbench	p. 192
Compiling the Program	p. 193
Loading the Program	p. 194
Troubleshooting	p. 194
The Stand-Alone Breadboard	p. 194
The PCB Circuit	p. 195
Summary	p. 197
Chapter 10 Quiz	p. 197
Appendix A The MSP430 Instruction Set	p. 200
Appendix B Standard Register and bit Definitions for the MSP430 Microcontrollers	p. 260
Appendix C Application Program for Use in Chapter 10	p. 273
Appendix D A Refresher	p. 290
Ohm's Law	p. 290
Decibel-A Quantity to Describe Gain	p. 291
Passive Devices	p. 292
The Diode-A One-Way Valve for Current	p. 294
Active Devices	p. 294
Four Common Types	p. 297
About the Author	p. 299
Index	p. 300

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