Maxim-integrated MAXQ7666 Bedienungsanleitung Seite 97
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3.2 Analog I/O Module Control and Status Registers
The analog I/O module uses the following control and status registers.
3.2.1 Analog Power Enable Register (APE)
Register Description: Analog Power Enable Register
Register Name: APE
Register Address: Module 05h, Index 01h
Bits 15, 14, 13, 9, 8, and 2: Reserved. Read 0, write ignored.
Bit 12: I/O Voltage Brownout Detection Enable (VIBE). See
Section 2
for details on this bit.
Bit 11: Digital Voltage Brownout Detection Enable (VDBE). See
Section 2
for details on this bit.
Bit 10: Digital Voltage Reset Enable (VDPE). See
Section 2
for details on this bit.
Bits 7, 6, 5: PGA Gain Setting Bits 2, 1, 0 (PGG2, PGG1, PGG0). These bits set the PGA gain as shown in the following table. The
PGA is bypassed when the PGA gain selected is 1.
Bit 4: Temperature Sensor Enable (TSE). Setting this bit to logic 1 enables the temperature sensor. Clearing this bit to logic 0 turns
off the power to the temperature sensor and disables its operation. The ADCMX4:ADCMX0 bits in the ADC control register determine
if the internal or external temperature sensor configuration is used.
Bit 3: PGA Enable (PGAE). The PGA is enabled when this bit is set to logic 1. Clearing this bit to 0 disables the PGA. The PGAE should
be enabled 5µs before attempting a conversion with a PGA gain other than 1. Note: To bypass the PGA, select a PGA gain of 1
(PGG2:PGG0) and clear the PGAE bit to 0. Setting PGAE = 0 significantly reduces power consumption.
Bit 1: DAC Enable (DACE). Setting this bit to logic 1 enables the DAC block to be ready for conversion. Clearing this bit to logic 0
turns off the power to the DAC block and disables its operation.
Bit 0: ADC Enable (ADCE). Setting this bit to logic 1 enables the ADC block to be ready for conversion. Clearing this bit to logic 0
turns off the power to the ADC block and disables its operation.
MAXQ7665/MAXQ7666 User’s Guide
3-7
Bit #
15 14 13 12 11 10 9 8
Name — — — VIBE VDBE VDPE — —
Reset 0 0 0 0 0 1 0 0
Access r r r rw rw rw r r
Bit #
7 6 5 4 3 2 1 0
Name PGG2 PGG1 PGG0 TSE PGAE — DACE ADCE
Reset 0 0 0 0 0 0 0 0
Access rw rw rw rw rw r rw rw
r = read, w = write
Note: This register is cleared to 0400h on all forms of reset.
PGG2:PGG0 PGA GAIN
000 1 (Default)
001 2
010 4
011 8
100 16
101 32
110 Reserved, should not be used
111 Reserved, should not be used
Maxim Integrated
- Functional Diagrams 1
- 1.1 Overview 7
- 1.1.2 Instruction Set 8
- 1.1.4 Register Space 8
- 1.2 Architecture 9
- 1.2.1 Instruction Decoding 10
- 1.2.2 Register Space 11
- 1.2.3 Memory Organization 13
- 1.2.3.2 Utility ROM 16
- 1.2.3.3 Data Memory 16
- 1.2.3.4 Stack Memory 17
- 1.2.3.7 Data Alignment 19
- CDA0 = 1 21
- 1.2.4 Interrupts 25
- 1.3 Programming 31
- 1.3.6.1 Sign Flag 37
- 1.3.6.2 Zero Flag 38
- 1.3.6.3 Equals Flag 38
- 1.3.6.4 Carry Flag 38
- 1.3.6.5 Overflow Flag 39
- 1.3.7.2 Unconditional Jumps 39
- 1.3.7.3 Conditional Jumps 40
- 1.3.7.4 Calling Subroutines 40
- 1.3.7.5 Looping Operations 40
- 1.3.8 Handling Interrupts 41
- 1.3.9 Accessing the Stack 42
- 1.3.10 Accessing Data Memory 43
- 1.4.19 General Register (GR) 59
- 2.1 Architecture 75
- 2.3 Supply Configuration 83
- 2.4 Linear Regulator 84
- 2.5 Power-On Reset 84
- 2.5.1 Power-Up Counter 85
- 2.5.3 Reset Output 87
- 2.7 Reset Mode 89
- 2.7.2 External Reset 90
- 2.7.3 Internal System Reset 90
- SECTION 3: ANALOG I/O MODULE 91
- 3.1.1 Analog I/O Pins 96
- Register Name: ACNT 98
- ADCMX2 ADCMX1 FUNCTION 99
- 1 1 Reserved 99
- Maxim Integrated 100
- Section 5 104
- Section 2 104
- Section 3.3.6 107
- Section 3.4 107
- Table 3-2. ADC Signals 108
- Section 3.3.10 110
- 3.3.4 Unipolar/Bipolar 111
- 3.3.5 Transfer Function 112
- Section 3.3.3 115
- Section 3.3.5 115
- 3.3.7 Analog Input Protection 116
- 3.3.8 ADC Clock 117
- 3.3.9 Auto Shutdown Mode 117
- 3.3.11 ADC Interrupts 122
- 3.3.12 Using the ADC 123
- 3.4 Temperature Sensor 124
- Sections 15 125
- TEMPERATURE (°C) 126
- Section 3.4.2 127
- Table 3-12. DAC Signals 128
- 3.5.4 DAC Power-Down 130
- 3.5.5 Using the DAC 130
- LIST OF FIGURES 133
- LIST OF TABLES 133
- 4.1 Architecture 134
- 4.2 CAN Controller Registers 136
- 4.3 CAN Operations 177
- 4.3.1.2 Remote Frame 180
- 4.3.1.3 Error Frame 181
- 4.3.1.4 Overload Frame 181
- 4.5 External Pins 182
- 4.7 CAN Interrupts 183
- 4.8.1 Message Center 15 185
- 4.9.2 Receiving Data Messages 186
- 4.15 Bit Timing 194
- 4.16 CAN Bus Activity 197
- 5.1 Architecture 200
- Section 3 204
- 76543210 205
- Reset 0 0 1 0 0 0 0 1 205
- Access rw r r rw rw rw rw rw 205
- 5.3 System Clock Generation 209
- 5.4 Watchdog Timer 215
- 5.5 Power Management Mode 217
- 5.5.2 Switchback Mode 218
- 5.5.3 Stop Mode 218
- SECTION 6: SERIAL I/O MODULE 219
- 6.1.1 UART Pins 223
- 6.2 UART Registers 223
- Serial Mode Definition 224
- — — — — — — — 226
- 6.3 Modes of Operation 227
- 6.3.3 UART Mode 2 230
- 6.3.4 UART Mode 3 230
- 6.4 Baud-Rate Generation 233
- 6.4.4 Baud-Clock Generator 234
- 6.5 Framing Error Detection 235
- 7.1 Architecture 238
- Compare Mode: 244
- Capture Mode: 244
- 7.2.3 Type 2 Reload Registers 248
- 7.3.3 16-Bit Counter 255
- 7.3.4 Dual 8-Bit Timers 256
- 7.4.3 Measure Period 259
- 8.1 Architecture 264
- 8.1.1 Port Pins 265
- 8.2 Port Registers 265
- 8.3 GPIO Operation 271
- 8.3.4 Port Pin Examples 273
- 9.1 Architecture 276
- 9.1.1 SPI Pins 277
- 9.2 SPI Peripheral Registers 277
- 9.3 SPI Operation 282
- 9.3.2 SPI Slave Operation 283
- 9.3.3 SPI Transfer Formats 284
- 9.4 SPI Transfer Baud Rates 285
- 9.5 SPI System Errors 285
- 9.6 SPI Interrupts 286
- 10.1 TAP Overview 289
- 10.2 Architecture 289
- 10.2.1 TAP Pins 290
- 10.3 TAP Interface Control 291
- 10.4 TAP Controller Operation 292
- 10.4.2 Run-Test-Idle 293
- 10.4.3 IR-Scan Sequence 293
- 10.4.5 Communication via TAP 294
- 11.1 Architecture 299
- Section 12 303
- Section 10 305
- Section 1 305
- 11.3 Debug Engine Operation 306
- 11.3.2 Breakpoint Registers 308
- 11.3.3 Using Breakpoints 310
- 11.3.4 Debug Mode 311
- 11.3.5 Debug Mode Commands 311
- 11.3.8 Return 313
- 12.1 Bootstrap-Loader Mode 317
- Section 11 318
- Section 12.5 320
- 12.5 JTAG Bootloader Protocol 321
- 13.6 Operand Count Selection 335
- 13.8 Accessing the Multiplier 336
- Acc.<b> 343
- 1000 1010 0001 1010 345
- 1101 1010 0010 1010 346
- 0011 1100 ssss ssss 349
- 0111 1100 ssss ssss 349
- 1111 1010 bbbb 1010 352
- 1101 1010 0000 1010 353
- 1110 1010 bbbb 1010 353
- 1101 1010 0001 1010 354
- 1ddd dddd 0bbb 0111 354
- 1ddd dddd 1bbb 0111 354
- 1000 1010 1001 1010 355
- .<b> 356
- 1110 1100 0000 1101 359
- 1001 1100 0000 1101 359
- 1101 1100 0000 1101 359
- 1100 1100 0000 1101 359
- 1000 1100 1000 1101 360
- 1010 1100 1000 1101 360
- 1110 1100 1000 1101 360
- 1001 1100 1000 1101 361
- 1101 1100 1000 1101 361
- 1100 1100 1000 1101 361
- 1000 1010 0100 1010 362
- 1000 1010 0101 1010 362
- 1000 1010 1100 1010 363
- 1000 1010 1101 1010 363
- 1000 1010 0010 1010 364
- 1000 1010 0011 1010 364
- 1000 1010 0110 1010 364
- 1000 1010 1010 1010 365
- 1000 1010 1111 1010 365
- 1000 1010 1110 1010 366
- 1000 1010 1011 1010 366
- 1000 1010 0111 1010 368
- 1000 1010 1000 1010 368
- 1011 1010 bbbb 1010 369
- WITH TYPE A FLASH) 371
- 15.2 Data Transfer Functions 372
- TYPE F FLASH) 378
- 16.2 Data Transfer Functions 383
- REVISION HISTORY 386
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