Texas-instruments MSP430x4xx Manual de usuario Pagina 248
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Timer_B Operation
13-16 Timer_B
Output Example—Timer in Continuous Mode
The OUTx signal is changed when the timer reaches the TBCLx and TBCL0
values, depending on the output mode, An example is shown in Figure 13−13
using TBCL0 and TBCL1.
Figure 13−13. Output Example—Timer in Continuous Mode
0h
TBR
(max)
TBIFG
Output Mode 1: Set
Output Mode 2: Toggle/Reset
Output Mode 3: Set/Reset
Output Mode 4: Toggle
Output Mode 5: Reset
Output Mode 6: Toggle/Set
Output Mode 7: Reset/Set
TBCL0
TBCL1
EQU1 TBIFG EQU1 EQU0 Interrupt EventsEQU0
- User’s Guide 1
- Read This First 3
- Glossary 4
- Register Bit Conventions 5
- Contents 10
- Contents 11
- Introduction 14
- 1.1 Architecture 15
- 1.2 Flexible Clock System 15
- 1.3 Embedded Emulation 16
- 1.4 Address Space 17
- 1.4.3 Peripheral Modules 18
- 1.4.5 Memory Organization 18
- System Resets, Interrupts 19
- 2.1.1 Brownout Reset (BOR) 21
- Figure 2−2. Brownout Timing 21
- Software Initialization 22
- 2.2 Interrupts 23
- Reset/NMI Pin 24
- Oscillator Fault 26
- Flash Access Violation 26
- 2.2.2 Maskable Interrupts 27
- 2.2.3 Interrupt Processing 28
- Interrupt Acceptance 28
- Return From Interrupt 29
- 2.2.4 Interrupt Vectors 30
- 2.3 Operating Modes 31
- 2.5 Connection of Unused Pins 34
- 35
- 3.1 CPU Introduction 36
- Figure 3−1. CPU Block Diagram 37
- 3.2 CPU Registers 38
- 3.2.2 Stack Pointer (SP) 39
- Figure 3−3. Stack Pointer 39
- Figure 3−4. Stack Usage 39
- 3.2.3 Status Register (SR) 40
- 3.3 Addressing Modes 43
- 3.3.1 Register Mode 44
- 3.3.2 Indexed Mode 45
- 3.3.3 Symbolic Mode 46
- 3.3.4 Absolute Mode 47
- 3.3.5 Indirect Register Mode 48
- 3.3.7 Immediate Mode 50
- 3.4 Instruction Set 51
- B/W D/S-Reg 53
- 3.4.3 Jumps 54
- Table 3−13.Jump Instructions 54
- Clear carry bit 65
- Clear negative bit 66
- Decrement destination 71
- ] Increment destination 75
- −> PC 78
- No operation 87
- Rotate left arithmetically 92
- Rotate left through carry 93
- Instruction Set 100
- RISC 16−Bit CPU 100
- Instruction Set 101
- 15 8 7 0 102
- → PC −−−− 109
- 110
- 4-3FLL+ Clock Module 112
- 4-4 FLL+ Clock Module 113
- FLL+ Clock Module Operation 114
- 4-5FLL+ Clock Module 114
- 4.2.2 LFXT1 Oscillator 115
- 4.2.3 XT2 Oscillator 115
- DCO Frequency Range 116
- 4.2.6 DCO Modulator 117
- 4.2.9 Buffered Clock Output 118
- Table 4−2.FLL+ Registers 120
- FLL+ Clock Module Registers 122
- 4-13FLL+ Clock Module 122
- 76543210 123
- DCOPLUS XTS_FLL XCAPxPF XT2OF 123
- XT1OF LFOF DCOF 123
- 4-16 FLL+ Clock Module 125
- 126
- 5.1 Flash Memory Introduction 127
- 5.2 Flash Memory Segmentation 128
- 5.3 Flash Memory Operation 129
- 5.3.2 Erasing Flash Memory 130
- Table 5−1.Erase Modes 130
- Initiating an Erase from RAM 132
- 5.3.3 Writing Flash Memory 133
- Table 5−2.Write Modes 133
- Byte/Word Write 133
- Block Write 136
- Block Write Flow and Example 137
- Figure 5−11. Block Write Flow 137
- Flash Memory Operation 140
- 5-15 Flash Memory Controller 140
- - Program via JTAG 140
- 5-16 Flash Memory Controller 141
- 5.4 Flash Memory Registers 142
- Flash Memory Registers 144
- 5-19 Flash Memory Controller 144
- 5-21 Flash Memory Controller 146
- 147
- 6.1 SVS Introduction 148
- Figure 6−1. SVS Block Diagram 149
- 6.2 SVS Operation 150
- 6.2.3 Changing the VLDx Bits 151
- 6.2.4 SVS Operating Range 152
- 6.3 SVS Registers 153
- Hardware Multiplier 154
- 7.2.1 Operand Registers 156
- Table 7−1.OP1 addresses 156
- 7.2.2 Result Registers 157
- Table 7−2.RESHI Contents 157
- Table 7−3.SUMEXT Contents 157
- MACS Underflow and Overflow 157
- 7.2.3 Software Examples 158
- 7.2.5 Using Interrupts 159
- 161
- 8.1 DMA Introduction 162
- 8.2 DMA Operation 164
- 8.2.2 DMA Transfer Modes 165
- Table 8−1.DMA Transfer Modes 165
- Single Transfer 166
- Block Transfers 168
- Burst-Block Transfers 170
- Edge-Sensitive Triggers 172
- Level-Sensitive Triggers 172
- 8.2.4 Stopping DMA Transfers 174
- 8.2.5 DMA Channel Priorities 174
- 8.2.6 DMA Transfer Cycle Time 175
- 8.2.9 Using the I 177
- 8.3 DMA Registers 178
- Digital I/O 184
- 9.1 Digital I/O Introduction 185
- 9.2 Digital I/O Operation 186
- Digital I/O Operation 187
- 9-4 Digital I/O 187
- 9.2.5 P1 and P2 Interrupts 188
- Interrupt Enable P1IE, P2IE 189
- 9.3 Digital I/O Registers 190
- Chapter 10 191
- Watchdog Timer Introduction 193
- 10.2 Watchdog Timer Operation 194
- 10.2.5 WDT+ Enhancements 195
- 10.2.7 Software Examples 196
- 10.3 Watchdog Timer Registers 197
- Watchdog Timer Registers 199
- 201
- Basic Timer1 Introduction 203
- 11-3Basic Timer1 203
- 11.2 Basic Timer1 Operation 204
- 11-5Basic Timer1 205
- 11.3 Basic Timer1 Registers 206
- 11-8 Basic Timer1 208
- 11-9Basic Timer1 209
- Chapter 12 210
- 12.1 Timer_A Introduction 211
- Timer_A Introduction 212
- 12-3Timer_A 212
- 12.2 Timer_A Operation 213
- 12.2.2 Starting the Timer 214
- 12.2.3 Timer Mode Control 214
- Table 12−1.Timer Modes 214
- Figure 12−2. Up Mode 215
- Continuous Mode 216
- Figure 12−4. Continuous Mode 216
- Use of the Continuous Mode 217
- Up/Down Mode 218
- Figure 12−7. Up/Down Mode 218
- Use of the Up/Down Mode 219
- 12.2.4 Capture/Compare Blocks 220
- Capture Mode 220
- Figure 12−11.Capture Cycle 221
- Compare Mode 221
- 12.2.5 Output Unit 222
- Output Modes 222
- Table 12−2.Output Modes 222
- Timer_A Operation 223
- 12-14 Timer_A 223
- 12-15Timer_A 224
- 12-16 Timer_A 225
- 12.2.6 Timer_A Interrupts 226
- TACCR0 Interrupt 226
- 12-18 Timer_A 227
- 12.3 Timer_A Registers 228
- TAR, Timer_A Register 230
- Chapter 13 233
- 13.1 Timer_B Introduction 234
- Timer_B Introduction 235
- 13-3Timer_B 235
- 13.2 Timer_B Operation 236
- 13.2.2 Starting the Timer 237
- 13.2.3 Timer Mode Control 237
- Table 13−1.Timer Modes 237
- Figure 13−2. Up Mode 238
- Figure 13−4. Continuous Mode 239
- Figure 13−7. Up/Down Mode 241
- 13.2.4 Capture/Compare Blocks 243
- Figure 13−11.Capture Cycle 244
- Table 13−2.TBCLx Load Events 245
- 13.2.5 Output Unit 246
- Table 13−4.Output Modes 246
- Timer_B Operation 247
- 13-15Timer_B 247
- 13-16 Timer_B 248
- 13-17Timer_B 249
- 13.2.6 Timer_B Interrupts 250
- 13-19Timer_B 251
- 13.3 Timer_B Registers 252
- TBR, Timer_B Register 254
- Chapter 14 258
- USART Introduction: UART Mode 260
- 14.2.2 Character Format 261
- Figure 14−2. Character Format 261
- Figure 14−3. Idle-Line Format 262
- USART Operation: UART Mode 263
- Automatic Error Detection 265
- 14.2.4 USART Receive Enable 266
- 14.2.5 USART Transmit Enable 267
- Baud Rate Bit Timing 269
- Transmit Bit Timing 270
- Receive Bit Timing 271
- Figure 14−9. Receive Error 271
- Typical Baud Rates and Errors 273
- 14.2.7 USART Interrupts 274
- UxCTL, USART Control Register 279
- USART Registers: UART Mode 282
- UxRXBUFx 283
- UxTXBUFx 283
- ME1, Module Enable Register 1 284
- ME2, Module Enable Register 2 284
- Chapter 15 287
- USART Introduction: SPI Mode 289
- 15.2.2 Master Mode 291
- Four-Pin SPI Master Mode 291
- 15.2.3 Slave Mode 292
- Four-Pin SPI Slave Mode 292
- 15.2.4 SPI Enable 293
- Transmit Enable 293
- Receive Enable 294
- 15.2.5 Serial Clock Control 295
- Figure 15−9. USART SPI Timing 296
- 15.2.6 SPI Interrupts 297
- USART Operation: SPI Mode 298
- USART Registers: SPI Mode 303
- Chapter 16 308
- 16.1 OA Introduction 309
- Figure 16−1. OA Block Diagram 310
- 16.2 OA Operation 311
- 16.2.4 OA Configurations 312
- Table 16−1.OA Mode Select 312
- General Purpose Opamp Mode 312
- Unity Gain Mode 312
- Comparator Mode 312
- Non-Inverting PGA Mode 313
- Inverting PGA Mode 313
- Differential Amplifier Mode 313
- 16-10 OA 317
- 16.3 OA Registers 318
- OANx OAPx OAPMx OAADC1 OAADC0 319
- OAFBRx OAFCx Reserved OARRIP 320
- Comparator_A 321
- Comparator_A Introduction 323
- 17-3Comparator_A 323
- 17.2 Comparator_A Operation 324
- 17.2.3 Output Filter 325
- 17.3 Comparator_A Registers 329
- LCD Controller 332
- LCD Controller Introduction 334
- 18-3LCD Controller 334
- 18.2 LCD Controller Operation 335
- 18.2.4 LCD Voltage Generation 336
- LCD Contrast Control 336
- 18.2.5 LCD Outputs 336
- 18.2.6 Static Mode 337
- Static Mode Software Example 339
- 18.2.7 2-Mux Mode 340
- 2-Mux Mode Software Example 342
- 18.2.8 3-Mux Mode 343
- 3-Mux Mode Software Example 345
- 18.2.9 4-Mux Mode 346
- 4-Mux Mode Software Example 348
- 18.3 LCD Controller Registers 349
- LCDCTL, LCD Control Register 350
- LCD_A Controller 351
- LCD_A Controller Introduction 353
- 19-3LCD_A Controller 353
- 19.2.1 LCD Memory 354
- Figure 19−2. LCD memory 354
- 19.2.2 Blinking the LCD 354
- LCD Voltage Selection 355
- LCD Bias Generation 355
- Figure 19−3. Bias Generation 356
- 19.2.4 LCD Timing Generation 358
- 19.2.5 LCD Outputs 358
- 19.2.6 Static Mode 359
- 19.2.7 2-Mux Mode 362
- 19.2.8 3-Mux Mode 365
- 19.2.9 4-Mux Mode 368
- 19.3 LCD Controller Registers 371
- LCD_A Controller Operation 374
- 19-24 LCD_A Controller 374
- 19-26 LCD_A Controller 376
- Chapter 20 377
- 20.1 ADC12 Introduction 378
- †MSP430FG43x devices only 379
- 20.2 ADC12 Operation 380
- Analog Port Selection 381
- 20.2.4 Auto Power-Down 382
- Extended Sample Mode 383
- Pulse Sample Mode 384
- Sample Timing Considerations 385
- 20.2.6 Conversion Memory 386
- 20.2.7 ADC12 Conversion Modes 386
- x = pointer to ADC12MCTLx 387
- Sequence-of-Channels Mode 388
- Repeat-Single-Channel Mode 389
- Stopping Conversions 391
- ADC12 Operation 392
- 20-16 ADC12 392
- 20-17ADC12 393
- 20.2.10 ADC12 Interrupts 394
- 20.3 ADC12 Registers 396
- ADC12 Registers 401
- 20-25ADC12 401
- 20-26 ADC12 402
- ADC12IEx 402
- ADC12IFGx 402
- ADC12 interrupt vector value 403
- Chapter 21 404
- 21.1 SD16 Introduction 405
- SD16 Introduction 406
- 21-3SD16 406
- 21.2 SD16 Operation 407
- Analog Input Setup 408
- 21.2.6 Digital Filter 409
- SD16 Operation 410
- 21-7SD16 410
- Digital Filter Output 411
- ZERO 8000 800000 412
- 21.2.8 Conversion Modes 413
- 21-11SD16 414
- 21-12 SD16 415
- 21-13SD16 416
- 21-14 SD16 417
- 21-15SD16 418
- 21.2.11 Interrupt Handling 419
- Interrupt Delay Operation 419
- 21.3 SD16 Registers 421
- 12’s complement 423
- SD16 interrupt vector value 426
- Chapter 22 427
- 22.1 SD16_A Introduction 428
- SD16_A Introduction 429
- 22-3SD16_A 429
- 22.2 SD16_A Operation 430
- 22.2.7 Digital Filter 432
- SD16_A Operation 433
- 22-7SD16_A 433
- 22-9SD16_A 435
- 22.2.9 Conversion Modes 437
- Single Conversion 437
- Continuous Conversion 437
- 22-12 SD16_A 438
- 22.2.11 Interrupt Handling 439
- 22.3 SD16_A Registers 440
- SD16_A Registers 445
- 22-19SD16_A 445
- Conversion 445
- SD16_A interrupt vector value 446
- Chapter 23 447
- 23.1 DAC12 Introduction 448
- DAC12 Introduction 449
- 23-3DAC12 449
- 23-4 DAC12 450
- 23.2 DAC12 Operation 451
- 23.2.2 DAC12 Reference 452
- 23.2.4 DAC12_xDAT Data Format 453
- Figure 23−5. Negative Offset 454
- Figure 23−6. Positive Offset 454
- DAC12 Operation 455
- 23-9DAC12 455
- 23.2.7 DAC12 Interrupts 456
- 23.3 DAC12 Registers 457
- 461
- 24.1 Scan IF Introduction 462
- Scan IF Introduction 463
- 24-3Scan IF 463
- 24.2 Scan IF Operation 464
- Scan IF Operation 465
- 24-5Scan IF 465
- Excitation 466
- Mid-Voltage Generator 466
- 24-7Scan IF 467
- Sample-And-Hold 468
- 24-10 Scan IF 470
- Comparator and DAC 471
- 24-13Scan IF 473
- 24-14 Scan IF 474
- 24-15Scan IF 475
- TSM Operation 476
- TSM Control of the AFE 476
- TSM State Duration 476
- Table 24−5.TSM State Duration 476
- TSM State Clock Source Select 477
- TSM Stop Condition 477
- TSM Test Cycles 478
- TSM Example 479
- 24-20 Scan IF 480
- PSM Operation 481
- Next State Calculation 482
- PSM Counters 483
- Simplest State Machine 484
- 24.2.4 Scan IF Debug Register 486
- 24.2.5 Scan IF Interrupts 487
- Table 24−7.Scan IF Interrupts 487
- 24-28 Scan IF 488
- 24-29Scan IF 489
- 24-30 Scan IF 490
- 24-31Scan IF 491
- 24-32 Scan IF 492
- 24.2.8 Quadrature Decoding 493
- 24.3 Scan IF Registers 495
- Scan IF Registers 496
- 24-36 Scan IF 496
- Reserved 496
- SIFDEBUGx 496
- Last PSM 496
- 24-37Scan IF 497
- TSM Index 497
- PSM Bits 497
- 24-39Scan IF 499
- SIFCNT2x 499
- SIFCNT1x 499
- SIFPSMVx 499
- 24-41Scan IF 501
- SIFTESTD 501
- 24-49Scan IF 509
- DAC Data 509
- Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 512
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