Texas Instruments MSP430x1xx manuales

Texas instruments MSP430x1xx Manual de usuario (440 paginas)

Marca: Texas-instruments | Categoria: Hardware | Tamaño: 1.49 MB |

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Tabla de contenidos

User’s Guide

1

Read This First

3

Notational Conventions

4

FCC Warning

4

Contents

10

Contents

11

Contents

11

Figures

13

Figures

13

Tables

19

Examples

20

Notes, Cautions, and Warnings

21

1.1 Features and Capabilities

24

1.2 11x Devices

25

1.3 11x1 Devices

25

1.4 13x Devices

26

1.5 14x Devices

26

Architectural Overview

27

2.1 Introduction

28

2.2 Central Processing Unit

28

2.3 Program Memory

29

2.4 Data Memory

29

2.5 Operation Control

29

2.6 Peripherals

30

System Resets, Interrupts

31

3.1.1 Introduction

32

Rise Time

33

Global Interrupt Structure

35

3.4 Interrupt Processing

39

Interrupt Processing

40

3.4.2.1 External Interrupts

45

3.5 Operating Modes

46

CPU is disabled

47

MCLK is disabled

47

SMCLK and ACLK remain active

47

CPUOff = 1

49

SCG0 = 1

49

SCG1 = 0

49

3.5.3 Low-Power Mode 4 (LPM4)

51

Potential Comment

52

Chapter 4

53

4.1 Introduction

54

4.2 Data in the Memory

55

4.3 Internal ROM Organization

56

Internal ROM Organization

57

4.4.1 Random Access Memory

58

Figure 4–6. Register

59

4.4.2.1 Word Modules

60

4.4.2.2 Byte Modules

61

16-Bit CPU

65

5.1 CPU Registers

66

Figure 5–3. Stack Usage

67

CPU Registers

68

5.2 Addressing Modes

71

5.2.1 Register Mode

72

5.2.2 Indexed Mode

73

5.2.3 Symbolic Mode

74

5.2.4 Absolute Mode

75

5.2.5 Indirect Mode

76

Addressing Modes

77

5.2.7 Immediate Mode

78

5.2.8.1 Format-I Instructions

79

5.3 Instruction Set Overview

81

5.3.3 Conditional Jumps

84

5.3.5 Miscellaneous

86

5.4 Instruction Map

87

Hardware Multiplier

89

16-Bit Hardware Multiplier

91

Hardware Multiplier Operation

92

Hardware Multiplier Registers

97

Basic Clock Module

101

7.1 Basic Clock Module

102

7.2 LFXT1 and XT2 Oscillators

104

7.2.2 XT2 Oscillator

105

LFXT1 and XT2 Oscillators

106

Figure 7–10. DCO Schematic

110

System Resets, Interrupts and

114

Operating Modes

114

Mode for MCLK

117

LFXT1CLK for Clock MCLK

117

Digital I/O Configuration

121

8.1 Introduction

122

8.2 Ports P1, P2

123

Table 8–1.Port P1 Registers

124

Table 8–2.Port P2 Registers

124

Ports P1, P2

125

8.3 Ports P3, P4, P5, P6

129

8.3.1.1 Input Registers

130

8.3.1.2 Output Registers

130

8.3.1.3 Direction Registers

130

8.3.2 Port P3–P6 Schematic

131

Watchdog Timer

133

9.1 The Watchdog Timer

134

Table 9–1.WDTCNT Taps

135

Figure 9–3. Reading WDTCTL

136

Figure 9–4. Writing to WDTCTL

136

9.1.3.1 Watchdog Mode

137

9.1.3.2 Timer Mode

138

9.1.3.4 Software Example

139

Chapter 10

141

10.1 Introduction

142

Introduction

143

10.2 Timer_A Operation

144

Timer_A Operation

145

10.2.3 Starting the Timer

146

10.3 Timer Modes

147

10.3.2.1 Timer in Up Mode

148

Figure 10–9. Timer

149

Continuous Mode

149

10.3.4 Timer—Up/Down Mode

150

Timer Modes

151

Figure 10–16. Altering CCR0

152

Timer in Up/Down Mode

152

10.4 Capture/Compare Blocks

153

Figure 10–19. Capture Signal

155

Figure 10–20. Capture Cycle

156

Capture Initiated by Software

157

10.5 The Output Unit

159

10.5.2 Output Control Block

161

10.5.3 Output Examples

162

10.6 Timer_A Registers

164

Table 10–4.Mode Control

165

Figure 10–28. TAR Register

166

Timer_A Registers

167

10.7 Timer_A UART

173

Timer_A UART

174

Chapter 11

177

11.1 Introduction

178

11.2 Timer_B Operation

181

Table 11–1. Timer Modes

182

11.2.4 Starting the Timer

183

11.3 Timer Modes

184

Immediate Mode for TBCL0

185

11.3.3 Timer—Continuous Mode

186

11.3.4 Timer—Up/Down Mode

188

11.4 Capture/Compare Blocks

191

Figure 11–19.Capture Signal

192

Figure 11–20.Capture Cycle

193

11.5 The Output Unit

199

11.5.2 Output Control Block

201

11.5.3 Output Examples

202

11.6 Timer_B Registers

205

Table 11–5. Mode Control

206

Timer_B Registers

207

Figure 11–28.TBR Register

208

11.6.4.5 Timing Limits

216

Chapter 12

217

USART Peripheral Interface

218

12.3 Asynchronous Operation

220

Asynchronous Operation

221

Example 12–1. 4800 Baud

222

Example 12–2. 19,200 Baud

222

Figure 12–7. Idle

223

Line Multiprocessor Format

223

Figure 12–11.Address

226

Bit Multiprocessor Format

226

SPI Mode

231

Control and Status Registers

232

Figure 12–23. Receive

238

Start Conditions

238

Figure 12–24. Receive

239

12.7 Baud Rate Considerations

241

Baud Rate Considerations

242

12.7.3 Synchronization Error

244

Chapter 13

247

13.2.1 SPI Mode Features

249

13.3 Synchronous Operation

250

Synchronous Operation

251

13.3.1 Master SPI Mode

253

13.3.2 Slave SPI Mode

254

13.5.1 USART Control Register

262

Comparator_A

267

14.1 Comparator_A Overview

268

14.2 Comparator_A Description

269

Comparator_A Description

270

Comparator_A in Applications

275

With Applied Analog Signals

276

This example uses the 0.25×V

281

Chapter 15

291

15.1 Introduction

292

Sampling

293

15.2.1 ADC Core

294

15.2.2 Reference

295

15.3.1 Analog Multiplexer

296

15.4 Conversion Memory

298

15.5 Conversion Modes

299

Conversion Modes

300

15.5.6 Power Down

310

12–bit S A R

312

15.7.3 Sampling Modes

314

15.7.3.2 Extended-Sample Mode

316

15.8 ADC12 Control Registers

320

ADC12 Control Registers

321

ADC12 Interrupt Vector

322

Register ADC12IV

322

ADC12IEN.x

327

Note: Basic Clock System

330

CPU clock MCLK

330

Peripheral File Map

333

A.1 Overview

334

A.3 Digital I/O, Byte Access

335

Only modifiable when ENC=0

342

Watchdog/Timer, Word Access

343

Instruction Set Description

351

B.1 Instruction Set Overview

352

Instruction Set Overview

353

B.1.1 Instruction Formats

354

B.1.3 Emulated Instructions

356

Instruction Set Description

359

Clear carry bit

369

Clear negative bit

370

Decrement destination

375

Figure B–4.Decrement Overlap

376

] Increment destination

380

Jump if greater or equal

385

Jump if less

386

Jump unconditionally

387

Jump if negative

388

No operation

392

Rotate left arithmetically

397

Rotate left through carry

398

Flash Memory

413

C.1 Flash Memory Organization

414

Simultaneously

415

Flash Memory Organization

416

Figure C–4

417

FUNCTION PERFORMED

420

CLR &0F012h

421

C.5.1 Flash Memory Protection

434

Execution Outside this Module

435

Outside This Flash Module

438

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