Analog Devices ADuCM356

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Reference Manual ADuCM356

LOW-POWER POTENTIOSTAT AMPLIFIERS AND LOW-POWER TIAS

analog.com Rev. A | 82 of 312

Figure 16. Low-Power TIA, Low-Power Potentiostat, and Low-Power DAC Switches for Channel 0

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Preface1
Scope1
Table of Contents2
Using the Aducm356 Hardware Reference Manual9
- Number Notations9
- Register Access Conventions9
Aducm356 Overview10
- Main Features of the Aducm35610
Clocking Architecture12
- Clocking Architecture Operation12
- Required Clock Ratio between Digital die and Analog die System Clocks12
- Digital die Clock Features12
- Analog die Clock Features12
- Clock Gating13
- Connecting AFE die Clock to Digital die Clock Input13
Register Summary: Clock Architecture15
Register Details: Clock Architecture16
- Key Protection for CTL Register16
- Oscillator Control Register16
- Clock Control 0 Register16
- Clock Dividers Register17
- User Clock Gating Control Register17
- Clocking Status Register18
- Clock Divider Configuration Register18
- Clock Gate Enable Register19
- Clock Select Register19
- GPIO Clock Mux Select to GPIO1 Pin Register20
- Key Protection for CLKCON0 Register20
- Clock Control of Low-Power TIA Chop, Watchdog, and Wake-Up Timers Register20
- Key Protection for OSCCON Register21
- Oscillator Control Register21
- High-Power Oscillator Configuration Register22
- Power Mode Configuration Register22
Power Management Unit23
- Power Management Unit Features23
- Power Management Unit Operation23
- Code Examples24
- Monitor Voltage Control25
Register Summary: Power Management Unit27
Register Details: Power Management Unit28
- Power Supply Monitor Interrupt Enable Register28
- Power Supply Monitor Status Register28
- Power Mode Register29
- Key Protection for PWRMOD and SRAMRET Register29
- Control for Retention SRAM During Hibernate Mode Register29
- High-Power Buck Control Register30
- Control for SRAM Parity and Instruction SRAM Register30
- Initialization Status Register31
- Power Modes Register32
- Key Protection for PWRMOD Register32
Arm Cortex-M3 Processor33
- Arm Cortex-M3 Processor Features33
- Arm Cortex-M3 Processor Operation33
- Arm Cortex-M3 Processor Related Documents34
System Resets35
- Digital die Reset Operation35
Register Summary: System Resets36
Register Details: System Resets37
- Digital die Reset Status Register37
- Always on Reset Status Register37
- Analog die Status Register37
Programming, Protection, and Debug38
- Booting38
- Security Features38
- Safety Features38
System Exceptions and Peripheral Interrupts39
- Cortex-M3 and Fault Management39
- Interrupt Sources from the Analog die41
- Clearing Analog die Interrupt Sources42
- Cortex-M3 NVIC Register List42
- External Interrupt Configuration43
Register Summary: System Exceptions and Peripheral Interrupts44
Register Details: System Exceptions and Peripheral Interrupts45
- External Interrupt Configuration 0 Register45
- External Wake-Up Interrupt Status Register46
- External Interrupt Clear Register46
- Nonmaskable Interrupt Clear Register46
- Analog die Interrupt Enable Register46
Analog die Circuitry Summary48
- ADC, High-Speed DAC, and Associated Amplifiers Operating Mode Configuration48
- System Bandwidth Configuration48
Register Summary: Analog die Circuitry50
Register Details: Analog die Circuitry51
- AFE Configuration Register51
ADC Circuit53
- ADC Circuit Overview53
- ADC Circuit Features53
- ADC Circuit Operation54
- ADC Transfer Function54
- ADC Low-Power Current Input Channels55
- ADC Input Circuit55
- ADC Postprocessing Filter Options55
- Averaging, Statistics, and Outlier Detection Options57
- Internal Temperature Sensor Channels57
- ADC Initialization58
- ADC Calibration58
- ADC Digital Signal Processor (DSP) Built in Self Test59
- Voltage Reference Options60
Register Summary: ADC Circuit61
Register Details: ADC Circuit63
- ADC Configuration Register63
- ADC Output Filters Configuration Register64
- Raw Result Register65
- DFT Result, Real Part Register66
- DFT Result, Imaginary Part Register66
- Sinc2 and Supply Rejection Filter Result Register66
- Temperature Sensor 0 Result Register66
- Analog Capture Interrupt Enable Register66
- Analog Capture Interrupt Register67
- AFE DSP Configuration Register68
- Temperature Sensor 0 Configuration Register69
- High-Power and Low-Power Buffer Control Register69
- Number of Repeat ADC Conversions Register70
- Buffer Configuration Register70
- Calibration Lock Register71
- Offset Calibration Low-Power TIA0 Channel Register71
- Gain Calibration for Low-Power TIA0 Channel Register71
- Offset Calibration Low-Power TIA1 Channel Register72
- Gain Calibration for Low-Power TIA1 Channel Register72
- Offset Calibration High-Speed TIA Channel Register72
- Gain Calibration for High-Speed TIA Channel Register73
- Offset Calibration Voltage Channel (PGA Gain = 1) Register73
- Gain Calibration Voltage Input Channel (PGA Gain = 1) Register73
- Offset Calibration Voltage Channel (PGA Gain = 1.5) Register73
- Gain Calibration Voltage Input Channel (PGA Gain = 1.5) Register74
- Offset Calibration Voltage Input Channel (PGA Gain = 2) Register74
- Gain Calibration Voltage Input Channel (PGA Gain = 2) Register74
- Offset Calibration Voltage Input Channel (PGA Gain = 4) Register75
- Gain Calibration Voltage Input Channel (PGA Gain = 4) Register76
- Offset Calibration Voltage Input Channel (PGA Gain = 9) Register76
- Gain Calibration Voltage Input Channel (PGA Gain = 9) Register76
- Offset Calibration Temperature Sensor Channel 0 Register76
- Gain Calibration Temperature Sensor Channel 0 Register77
- Minimum Value Check Register77
- Minimum Slow Moving Value Register77
- Maximum Value Check Register77
- Maximum Slow Moving Register78
- Delta Check Register78
- Statistics Module Configuration Register78
- Mean Output Register78
- Key Access for DSPUPDATEEN Register80
- Digital Logic Test Enable Register80
- Temperature Sensor 1 Control Register80
Low-Power Potentiostat Amplifiers and Low-Power Tias81
- Low-Power Potentiostat Amplifiers81
- Low-Power Tias81
- Low-Power Dacs84
Register Summary: Low-Power Tia/Potentiostat and Dac Circuits88
Register Details: Low Power Tia/Potentiostat and DAC Circuits89
- Low-Power TIA Control Bits Channel 0 Register89
- Low-Power TIA Switch Configuration for Channel 0 Register90
- Low-Power TIA Control Bits Channel 1 Register91
- Low-Power TIA Switch Configuration for Channel 1 Register93
- LPDAC0 Data out Register94
- LPDAC0 Switch Control Register94
- LPDAC0 Control Register95
- LPDAC1 Data out Register96
- LPDAC1 Switch Control Register96
- LPDAC1 Control Register96
- Low-Power Reference Control Register97
High-Speed TIA Circuits98
- Key Features98
- Using DE0 and DE1 Inputs with the High-Speed TIA99
- External RTIA Selection100
Register Summary: High-Speed TIA Circuits101
Register Details: High-Speed TIA Circuits102
- High-Speed RTIA Configuration Register102
- DE1 High-Speed TIA Resistor Configuration Register102
- DE0 High-Speed TIA Resistor Configuration Register102
- High-Speed TIA Amplifier Configuration Register103
High-Speed DAC Circuits104
- High-Speed DAC Output Signal Generation104
- High-Speed DAC Core Power Modes104
- Recommended Configuration in Hibernate Mode105
- High-Speed DAC Filter Options105
- High-Speed DAC Output Attenuation Options105
- Coupling an AC Signal from High-Speed DAC Onto the DC Level Set by Low-Power DAC106
- Avoiding Incoherency Errors between Excitation and Measurement Frequencies During Impedance Measurements106
- Calibrating the High-Speed DAC106
Register Summary: High-Speed DAC Circuits108
Register Details: High-Speed DAC Circuits109
- High-Speed DAC Configuration Register109
- Direct Write to DAC Output Control Value Register109
- DAC DC Buffer Configuration Register109
- DAC Gain Register109
- DAC Offset with Attenuator Enabled (Low-Power Mode) Register110
- DAC Offset with Attenuator Disabled (Low-Power Mode) Register110
- DAC Offset with Attenuator Enabled (High-Power Mode) Register110
- DAC Offset with Attenuator Disabled (High-Power Mode) Register111
- Waveform Generator Configuration Register111
- Waveform Generator for Sinusoid Frequency Control Word Register111
- Waveform Generator for Sinusoid Phase Offset Register112
- Waveform Generator for Sinusoid Offset Register112
- Waveform Generator for Sinusoid Amplitude Register112
Programmable Switches Connecting the External Sensor to the High-Speed DAC and High-Speed TIA113
- DX Switches113
- Px Switches113
- Nx Switches113
- Tx Switches113
- Options for Controlling All Switches113
Register Summary: Programmable Switches116
Register Details: Programmable Switches117
- Switch Matrix Configuration Register117
- DX Switch Matrix Full Configuration Register118
- Nx Switch Matrix Full Configuration Register119
- Px Switch Matrix Full Configuration Register120
- Tx Switch Matrix Full Configuration Register121
- DX Switch Matrix Status Register122
- Px Switch Matrix Status Register123
- Nx Switch Matrix Status Register124
- Tx Switch Matrix Status Register125
Sequencer127
- Sequencer Features127
- Sequencer Overview127
- Sequencer Commands127
- Sequencer Operation128
- Sequencer and FIFO Registers130
AFE Interrupts136
- Interrupt Controller Interrupts136
- Configuring the Interrupts136
- Custom Interrupts136
- Interrupt Registers137
Sleep and Wake-Up Timer143
- Sleep and Wake-Up Timer Features143
- Sleep and Wake-Up Timer Overview143
- Configuring a Defined Sequence Order143
- Recommended Sleep and Wake-Up Timer Operation143
- Sleep and Wake-Up Timer Registers144
Use Case Configurations148
- Hibernate Mode While Maintaining a DC Bias to the Sensor148
- Measuring a DC Current Output149
- Pulse Test (Chronoamperometry)151
- Cyclic Voltammetry152
- AC Impedance Measurement While Maintaining DC Bias to the Sensor154
DMA Controller160
- DMA Features160
- DMA Overview160
- DMA Analog die160
- DMA Architectural Concepts160
- DMA Operating Modes161
- Channel Control Data Structure161
- Source Data End Pointer162
- Destination Data End Pointer162
- Control Data Configuration162
- DMA Priority164
- DMA Transfer Types164
- DMA Interrupts and Exceptions167
- Endian Operation169
- DMA Channel Enable and Disable169
- DMA Initiator Enable169
- Power-Down Considerations169
Register Summary: DMA170
Register Details: DMA171
- Status Register171
- Configuration Register171
- Channel Primary Control Data Base Pointer Register171
- Channel Alternate Control Data Base Pointer Register171
- Channel Software Request Register171
- Channel Request Mask Set Register172
- Channel Request Mask Clear Register172
- Channel Enable Set Register172
- Channel Enable Clear Register173
- Channel Primary Alternate Set Register173
- Channel Primary Alternate Clear Register173
- Channel Priority Set Register173
- Channel Priority Clear Register174
- Bus Error Clear Register174
- Per Channel Bus Error Register174
- Per Channel Invalid Descriptor Clear Register176
- Channel Bytes Swap Enable Set Register176
- Channel Bytes Swap Enable Clear Register176
- Channel Source Address Decrement Enable Set Register176
- Channel Source Address Decrement Enable Clear Register177
- Channel Destination Address Decrement Enable Set Register177
- Channel Destination Address Decrement Enable Clear Register177
- FIFO Configuration Register178
- Data FIFO Read Register178
Flash Controller179
- Flash Controller Features179
- Flash Controller Overview179
- Supported Commands179
- Protection and Integrity Features179
- Flash Controller Operation179
- Flash Memory Structure180
- Flash Access181
- Reading Flash181
- Erasing Flash182
- Writing Flash182
- Keyhole Writes182
- Burst Writes182
- DMA Writes183
- Protection and Integrity183
- Key Register185
- Clock and Timings187
- Flash Operating Modes187
Register Summary: Flash Cache Controller189
Register Details: Flash Cache Controller (FLCC)190
- Status Register190
- Interrupt Enable Register192
- Command Register192
- Write Address Register193
- Write Lower Data Register193
- Write Upper Data Register195
- Lower Page Address Register195
- Upper Page Address Register195
- Key Register195
- Write Abort Address Register196
- Write Protection Register196
- Signature Register196
- User Configuration Register197
- IRQ Abort Enable (Lower Bits) Register197
- IRQ Abort Enable (Upper Bits) Register197
- ECC Configuration Register197
- ECC Status (Address) Register199
- Analog Devices Flash Security Register199
Sram200
- SRAM Features200
- Instruction Vs. Data SRAM200
- SRAM Retention in Hibernate Mode201
- SRAM Initialization201
Cache202
- Initialization in Cache and Instruction SRAM202
- Programming Guidelines202
Register Summary: Cache (FLCC)203
Register Details: Cache (FLCC)204
- Cache Status Register204
- Cache Setup Register204
- Cache Key Register204
Silicon Identification205
Register Summary: System (Digital Die)206
Register Details: System (Digital Die)207
- Analog Devices Identification (Digital Die) Register207
- Chip Identifier (Digital Die) Register207
- Serial Wire Debug Enable Register207
- Analog Devices Identification (Analog Die) Register207
- Chip Identification (Analog Die) Register207
- 16-Bit Scratch Register to Test Interdie Communications Register208
Digital Inputs and Outputs209
- Digital Inputs and Outputs Features209
- Digital Inputs and Outputs Overview209
- Digital Inputs and Outputs Operation209
- Interrupts210
- Digital die Port Mux211
- AFE die Digital Port Mux211
Register Summary: Digital Inputs and Outputs212
Register Details: Digital Inputs and Outputs214
- GPIO Port Configuration Registers214
- GPIO Port Output Enable Registers214
- GPIO Port Input/Output Pull-Up Enable Registers214
- GPIO Port Input Path Enable Registers215
- GPIO Port Registered Data Input Registers215
- GPIO Port Data Output Registers215
- GPIO Port Data Output Set Registers215
- GPIO Port Data Output Clear Registers217
- GPIO Port Pin Toggle Registers217
- GPIO Port Interrupt Polarity Registers217
- GPIO Port Interrupt a Enable Registers217
- GPIO Port Interrupt B Enable Registers218
- GPIO Port Interrupt Status Registers218
- GPIO Port Drive Strength Select Registers218
- AFE GPIO Port Configuration Register218
- AFE GPIO Port Output Enable Register219
- AFE GPIO Port Output Pull-Up and Pull-Down Enable Register219
- AFE GPIO Port Input Path Enable Register219
- AFE GPIO Port Registered Data Input219
- AFE GPIO Port Data Output Register219
- AFE GPIO Port Data Output Set Register220
- AFE GPIO Port Data Output Clear Register220
- AFE GPIO Port Pin Toggle Register220
I 2 C Serial Interface221
- I 2 C Features221
- I 2 C Overview221
- I 2 C Operation221
- I 2 C Operating Modes223
Register Summary: I 2 C226
Register Details: I 2 C227
- Initiator Control Register227
- Initiator Status Register227
- Initiator Receive Data Register228
- Initiator Transmit Data Register228
- Initiator Receive Data Count Register229
- Initiator Current Receive Data Count Register229
- First Initiator Address Byte Register229
- Second Initiator Address Byte Register229
- Serial Clock Period Divisor Register230
- Target Control Register230
- Target I 2 C Status, Error, and IRQ Register231
- Target Receive Register232
- Target Transmit Register232
- Hardware General Call ID Register232
- First Target Address Device ID Register232
- Second Target Address Device ID Register234
- Third Target Address Device ID Register234
- Fourth Target Address Device ID Register234
- Initiator and Target FIFO Status Register234
- Initiator and Target Shared Control Register235
- Automatic Stretch Control for Initiator and Target Mode Register235
Serial Peripheral Interfaces237
- SPI Features237
- SPI Overview237
- SPI Operation237
- SPI Transfer Initiation238
- SPI Interrupts240
- SPI Wire-Or'ed Mode240
- SPI CSERR Condition241
- Spi Dma241
- SPI and Power-Down Modes242
Register Summary: SPI0/SPI1243
Register Details: SPI0/SPI1244
- Status Registers244
- Receive Registers245
- Transmit Registers245
- Baud Rate Selection Registers245
- Configuration Registers245
- Interrupt Configuration Registers247
- Transfer Byte Count Registers248
- DMA Enable Registers248
- FIFO Status Registers249
- Read Control Registers249
- Flow Control Registers250
- Wait Timer for Flow Control Registers252
- Chip Select Override Registers252
UART Serial Interface253
- UART Overview253
- UART Features253
- UART Operation253
Register Summary: UART256
Register Details: UART257
- Transmit Holding Register257
- Receive Buffer Register257
- Interrupt Enable Register257
- Interrupt Identification Register258
- Line Control Register258
- Modem Control Register259
- Line Status Register259
- Modem Status Register260
- Scratch Buffer Register260
- FIFO Control Register260
- Fractional Baud Rate Register261
- Baud Rate Divider Register261
- Second Line Control Register261
- UART Control Register262
- Receive FIFO Count Register262
- Transmit FIFO Count Register262
- RS485 Half-Duplex Control Register262
- Autobaud Control Register263
- Autobaud Status (Low) Register263
- Autobaud Status (High) Register263
Digital die General-Purpose Timers264
- Digital die General-Purpose Timers Features264
- General-Purpose Timers Overview264
- General-Purpose Timer Operations264
Register Summary: General-Purpose Timers267
Register Details: General-Purpose Timers268
- 16-Bit Synchronous Load Value Registers268
- 16-Bit Timer Synchronous Value Registers268
- Control Registers268
- Clear Interrupt Registers269
- Capture Registers269
- 16-Bit Asynchronous Load Value Registers270
- 16-Bit Timer Asynchronous Value Registers270
- Status Registers270
Analog die General-Purpose Timers272
- Analog die General-Purpose Timers Features272
- Afe Pwm272
Register Summary: Analog die General-Purpose Timers273
Register Details: Analog die General-Purpose Timers274
- 16-Bit Load Value Register274
- 16-Bit Timer Value Register274
- Control Register274
- Clear Interrupt Register275
- 16-Bit Load Value, Asynchronous Register275
- 16-Bit Timer Value, Asynchronous Register275
- Status Register275
- PWM Control Register276
- PWM Match Value Register276
- Interrupt Enable Register276
- 16-Bit Load Value Register277
- 16-Bit Timer Value Register277
- Control Register277
- Clear Interrupt Register278
- 16-Bit Load Value, Asynchronous Register278
- 16-Bit Timer Value, Asynchronous Register278
- Status Register279
- PWM Control Register279
- PWM Match Value Register279
AFE Watchdog Timer281
- Watchdog Timer Features and Block Diagram281
- Watchdog Timer Operation281
- Windowed Watchdog Feature281
- Interrupt Mode282
Register Summary: AFE Watchdog Timer283
Register Details: AFE Watchdog Timer284
- Watchdog Timer Load Value Register284
- Current Count Value Register284
- Watchdog Timer Control Register284
- Refresh Watchdog Register285
- Timer Status Register285
- Minimum Load Value Register286
Digital die Wake-Up Timer287
- Overview287
- Features287
- Regular and Periodic Modulo 60 Interrupts287
- Timer Matching Alarm Value Interrupts287
- WUT Functional Description287
- WUT Operating Modes288
- WUT Recommendations: Clock and Power288
Register Summary: Digital die Wake-Up Timer289
Register Details: Digital die Wake-Up Timer290
- Control 0 Register290
- Status 0 Register291
- Status 1 Register293
- Count 0 Register294
- Count 1 Register294
- Alarm 0 Register294
- Alarm 1 Register295
- Gateway Register295
- Control 1 Register295
- Status 2 Register296
- Snapshot 0 Register298
- Snapshot 1 Register298
- Snapshot 2 Register298
- Modulo Register299
- Count 2 Register299
- Alarm 2 Register301
- Status 6 Register301
Cyclic Redundancy Check303
- CRC Features303
- CRC Functional Description303
- CRC Data Transfer306
- CRC Interrupts and Exceptions306
- CRC Programming Model306
Register Summary: CRC308
Register Details: CRC309
- CRC Control Register309
- Input Data Word Register309
- CRC Result Register309
- Programmable CRC Polynomial Register309
- Input Data Bits Register309
- Input Data Byte Register310
Hardware Design Considerations311
- Typical System Configuration311
- Serial Wire Debug Interface311
- Rev. a | 6 of312

Analog Devices ADuCM356

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