SBASB80 October   2024 TAA3040

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics
    6. 5.6  Timing Requirements: I2C Interface
    7. 5.7  Switching Characteristics: I2C Interface
    8. 5.8  Timing Requirements: SPI Interface
    9. 5.9  Switching Characteristics: SPI Interface
    10. 5.10 Timing Requirements: TDM, I2S or LJ Interface
    11. 5.11 Switching Characteristics: TDM, I2S or LJ Interface
    12. 5.12 Timing Requirements: PDM Digital Microphone Interface
    13. 5.13 Switching Characteristics: PDM Digial Microphone Interface
    14. 5.14 Timing Diagrams
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Serial Interfaces
        1. 6.3.1.1 Control Serial Interfaces
        2. 6.3.1.2 Audio Serial Interfaces
          1. 6.3.1.2.1 Time Division Multiplexed Audio (TDM) Interface
          2. 6.3.1.2.2 Inter IC Sound (I2S) Interface
          3. 6.3.1.2.3 Left-Justified (LJ) Interface
        3. 6.3.1.3 Using Multiple Devices With Shared Buses
      2. 6.3.2 Phase-Locked Loop (PLL) and Clock Generation
      3. 6.3.3 Input Channel Configurations
      4. 6.3.4 Reference Voltage
      5. 6.3.5 Programmable Microphone Bias
      6. 6.3.6 Signal-Chain Processing
        1. 6.3.6.1 Programmable Channel Gain and Digital Volume Control
        2. 6.3.6.2 Programmable Channel Gain Calibration
        3. 6.3.6.3 Programmable Channel Phase Calibration
        4. 6.3.6.4 Programmable Digital High-Pass Filter
        5. 6.3.6.5 Programmable Digital Biquad Filters
        6. 6.3.6.6 Programmable Channel Summer and Digital Mixer
        7. 6.3.6.7 Configurable Digital Decimation Filters
          1. 6.3.6.7.1 Linear Phase Filters
            1. 6.3.6.7.1.1 Sampling Rate: 8 kHz or 7.35 kHz
            2. 6.3.6.7.1.2 Sampling Rate: 16 kHz or 14.7 kHz
            3. 6.3.6.7.1.3 Sampling Rate: 24 kHz or 22.05 kHz
            4. 6.3.6.7.1.4 Sampling Rate: 32 kHz or 29.4 kHz
            5. 6.3.6.7.1.5 Sampling Rate: 48 kHz or 44.1 kHz
            6. 6.3.6.7.1.6 Sampling Rate: 96 kHz or 88.2 kHz
            7. 6.3.6.7.1.7 Sampling Rate: 192 kHz or 176.4 kHz
            8. 6.3.6.7.1.8 Sampling Rate: 384 kHz or 352.8 kHz
            9. 6.3.6.7.1.9 Sampling Rate 768 kHz or 705.6 kHz
          2. 6.3.6.7.2 Low-Latency Filters
            1. 6.3.6.7.2.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 6.3.6.7.2.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 6.3.6.7.2.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 6.3.6.7.2.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 6.3.6.7.2.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 6.3.6.7.2.6 Sampling Rate 192 kHz or 176.4 kHz
          3. 6.3.6.7.3 Ultra-Low-Latency Filters
            1. 6.3.6.7.3.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 6.3.6.7.3.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 6.3.6.7.3.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 6.3.6.7.3.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 6.3.6.7.3.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 6.3.6.7.3.6 Sampling Rate 192 kHz or 176.4 kHz
            7. 6.3.6.7.3.7 Sampling Rate 384 kHz or 352.8 kHz
      7. 6.3.7 Automatic Gain Controller (AGC)
      8. 6.3.8 Digital PDM Microphone Record Channel
      9. 6.3.9 Interrupts, Status, and Digital I/O Pin Multiplexing
    4. 6.4 Device Functional Modes
      1. 6.4.1 Hardware Shutdown
      2. 6.4.2 Sleep Mode or Software Shutdown
      3. 6.4.3 Active Mode
      4. 6.4.4 Software Reset
    5. 6.5 Programming
      1. 6.5.1 Control Serial Interfaces
        1. 6.5.1.1 I2C Control Interface
          1. 6.5.1.1.1 General I2C Operation
          2. 6.5.1.1.2 I2C Single-Byte and Multiple-Byte Transfers
            1. 6.5.1.1.2.1 I2C Single-Byte Write
            2. 6.5.1.1.2.2 I2C Multiple-Byte Write
            3. 6.5.1.1.2.3 I2C Single-Byte Read
            4. 6.5.1.1.2.4 I2C Multiple-Byte Read
        2. 6.5.1.2 SPI Control Interface
  8. 7 Register Maps
    1. 7.1 Device Configuration Registers
      1. 7.1.1 Register Descriptions
        1. 7.1.1.1  PAGE_CFG Register (page = 0x00, address = 0x00) [reset = 0h]
        2. 7.1.1.2  SW_RESET Register (page = 0x00, address = 0x01) [reset = 0h]
        3. 7.1.1.3  SLEEP_CFG Register (page = 0x00, address = 0x02) [reset = 0h]
        4. 7.1.1.4  SHDN_CFG Register (page = 0x00, address = 0x05) [reset = 5h]
        5. 7.1.1.5  ASI_CFG0 Register (page = 0x00, address = 0x07) [reset = 30h]
        6. 7.1.1.6  ASI_CFG1 Register (page = 0x00, address = 0x08) [reset = 0h]
        7. 7.1.1.7  ASI_CFG2 Register (page = 0x00, address = 0x09) [reset = 0h]
        8. 7.1.1.8  ASI_CH1 Register (page = 0x00, address = 0x0B) [reset = 0h]
        9. 7.1.1.9  ASI_CH2 Register (page = 0x00, address = 0x0C) [reset = 1h]
        10. 7.1.1.10 ASI_CH3 Register (page = 0x00, address = 0x0D) [reset = 2h]
        11. 7.1.1.11 ASI_CH4 Register (page = 0x00, address = 0x0E) [reset = 3h]
        12. 7.1.1.12 ASI_CH5 Register (page = 0x00, address = 0x0F) [reset = 4h]
        13. 7.1.1.13 ASI_CH6 Register (page = 0x00, address = 0x10) [reset = 5h]
        14. 7.1.1.14 ASI_CH7 Register (page = 0x00, address = 0x11) [reset = 6h]
        15. 7.1.1.15 ASI_CH8 Register (page = 0x00, address = 0x12) [reset = 7h]
        16. 7.1.1.16 MST_CFG0 Register (page = 0x00, address = 0x13) [reset = 2h]
        17. 7.1.1.17 MST_CFG1 Register (page = 0x00, address = 0x14) [reset = 48h]
        18. 7.1.1.18 ASI_STS Register (page = 0x00, address = 0x15) [reset = FFh]
        19. 7.1.1.19 CLK_SRC Register (page = 0x00, address = 0x16) [reset = 10h]
        20. 7.1.1.20 PDMCLK_CFG Register (page = 0x00, address = 0x1F) [reset = 40h]
        21. 7.1.1.21 PDMIN_CFG Register (page = 0x00, address = 0x20) [reset = 0h]
        22. 7.1.1.22 GPIO_CFG0 Register (page = 0x00, address = 0x21) [reset = 22h]
        23. 7.1.1.23 GPO_CFG0 Register (page = 0x00, address = 0x22) [reset = 0h]
        24. 7.1.1.24 GPO_CFG1 Register (page = 0x00, address = 0x23) [reset = 0h]
        25. 7.1.1.25 GPO_CFG2 Register (page = 0x00, address = 0x24) [reset = 0h]
        26. 7.1.1.26 GPO_CFG3 Register (page = 0x00, address = 0x25) [reset = 0h]
        27. 7.1.1.27 GPO_VAL Register (page = 0x00, address = 0x29) [reset = 0h]
        28. 7.1.1.28 GPIO_MON Register (page = 0x00, address = 0x2A) [reset = 0h]
        29. 7.1.1.29 GPI_CFG0 Register (page = 0x00, address = 0x2B) [reset = 0h]
        30. 7.1.1.30 GPI_CFG1 Register (page = 0x00, address = 0x2C) [reset = 0h]
        31. 7.1.1.31 GPI_MON Register (page = 0x00, address = 0x2F) [reset = 0h]
        32. 7.1.1.32 INT_CFG Register (page = 0x00, address = 0x32) [reset = 0h]
        33. 7.1.1.33 INT_MASK0 Register (page = 0x00, address = 0x33) [reset = FFh]
        34. 7.1.1.34 INT_LTCH0 Register (page = 0x00, address = 0x36) [reset = 0h]
        35. 7.1.1.35 BIAS_CFG Register (page = 0x00, address = 0x3B) [reset = 0h]
        36. 7.1.1.36 CH1_CFG0 Register (page = 0x00, address = 0x3C) [reset = 0h]
        37. 7.1.1.37 CH1_CFG1 Register (page = 0x00, address = 0x3D) [reset = 0h]
        38. 7.1.1.38 CH1_CFG2 Register (page = 0x00, address = 0x3E) [reset = C9h]
        39. 7.1.1.39 CH1_CFG3 Register (page = 0x00, address = 0x3F) [reset = 80h]
        40. 7.1.1.40 CH1_CFG4 Register (page = 0x00, address = 0x40) [reset = 0h]
        41. 7.1.1.41 CH2_CFG0 Register (page = 0x00, address = 0x41) [reset = 0h]
        42. 7.1.1.42 CH2_CFG1 Register (page = 0x00, address = 0x42) [reset = 0h]
        43. 7.1.1.43 CH2_CFG2 Register (page = 0x00, address = 0x43) [reset = C9h]
        44. 7.1.1.44 CH2_CFG3 Register (page = 0x00, address = 0x44) [reset = 80h]
        45. 7.1.1.45 CH2_CFG4 Register (page = 0x00, address = 0x45) [reset = 0h]
        46. 7.1.1.46 CH3_CFG0 Register (page = 0x00, address = 0x46) [reset = 0h]
        47. 7.1.1.47 CH3_CFG1 Register (page = 0x00, address = 0x47) [reset = 0h]
        48. 7.1.1.48 CH3_CFG2 Register (page = 0x00, address = 0x48) [reset = C9h]
        49. 7.1.1.49 CH3_CFG3 Register (page = 0x00, address = 0x49) [reset = 80h]
        50. 7.1.1.50 CH3_CFG4 Register (page = 0x00, address = 0x4A) [reset = 0h]
        51. 7.1.1.51 CH4_CFG0 Register (page = 0x00, address = 0x4B) [reset = 0h]
        52. 7.1.1.52 CH4_CFG1 Register (page = 0x00, address = 0x4C) [reset = 0h]
        53. 7.1.1.53 CH4_CFG2 Register (page = 0x00, address = 0x4D) [reset = C9h]
        54. 7.1.1.54 CH4_CFG3 Register (page = 0x00, address = 0x4E) [reset = 80h]
        55. 7.1.1.55 CH4_CFG4 Register (page = 0x00, address = 0x4F) [reset = 0h]
        56. 7.1.1.56 CH5_CFG2 Register (page = 0x00, address = 0x52) [reset = C9h]
        57. 7.1.1.57 CH5_CFG3 Register (page = 0x00, address = 0x53) [reset = 80h]
        58. 7.1.1.58 CH5_CFG4 Register (page = 0x00, address = 0x54) [reset = 0h]
        59. 7.1.1.59 CH6_CFG2 Register (page = 0x00, address = 0x57) [reset = C9h]
        60. 7.1.1.60 CH6_CFG3 Register (page = 0x00, address = 0x58) [reset = 80h]
        61. 7.1.1.61 CH6_CFG4 Register (page = 0x00, address = 0x59) [reset = 0h]
        62. 7.1.1.62 CH7_CFG2 Register (page = 0x00, address = 0x5C) [reset = C9h]
        63. 7.1.1.63 CH7_CFG3 Register (page = 0x00, address = 0x5D) [reset = 80h]
        64. 7.1.1.64 CH7_CFG4 Register (page = 0x00, address = 0x5E) [reset = 0h]
        65. 7.1.1.65 CH8_CFG2 Register (page = 0x00, address = 0x61) [reset = C9h]
        66. 7.1.1.66 CH8_CFG3 Register (page = 0x00, address = 0x62) [reset = 80h]
        67. 7.1.1.67 CH8_CFG4 Register (page = 0x00, address = 0x63) [reset = 0h]
        68. 7.1.1.68 DSP_CFG0 Register (page = 0x00, address = 0x6B) [reset = 1h]
        69. 7.1.1.69 DSP_CFG1 Register (page = 0x00, address = 0x6C) [reset = 40h]
        70. 7.1.1.70 AGC_CFG0 Register (page = 0x00, address = 0x70) [reset = E7h]
        71. 7.1.1.71 IN_CH_EN Register (page = 0x00, address = 0x73) [reset = F0h]
        72. 7.1.1.72 ASI_OUT_CH_EN Register (page = 0x00, address = 0x74) [reset = 0h]
        73. 7.1.1.73 PWR_CFG Register (page = 0x00, address = 0x75) [reset = 0h]
        74. 7.1.1.74 DEV_STS0 Register (page = 0x00, address = 0x76) [reset = 0h]
        75. 7.1.1.75 DEV_STS1 Register (page = 0x00, address = 0x77) [reset = 80h]
        76. 7.1.1.76 I2C_CKSUM Register (page = 0x00, address = 0x7E) [reset = 0h]
    2. 7.2 Programmable Coefficient Registers
      1. 7.2.1 Programmable Coefficient Registers: Page = 0x02
      2. 7.2.2 Programmable Coefficient Registers: Page = 0x03
      3. 7.2.3 Programmable Coefficient Registers: Page = 0x04
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Four-Channel Analog Microphone Recording
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Example Device Register Configuration Script for EVM Setup
      2. 8.2.2 Eight-Channel Digital PDM Microphone Recording
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Example Device Register Configuration Script for EVM Setup
    3. 8.3 What to Do and What Not to Do
      1. 8.3.1 182
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Trademarks
    3. 9.3 Electrostatic Discharge Caution
    4. 9.4 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Package Option Addendum
      1. 11.1.1 Packaging Information
      2. 11.1.2 Tape and Reel Information

6.3.5 Programmable Microphone Bias

The device integrates a built-in, low-noise microphone bias pin that can be used in the system for biasing electret-condenser microphones or providing the supply to the MEMS analog or digital microphone. The integrated bias amplifier supports up to 20 mA of load current that can be used for multiple microphones and is designed to provide a combination of high PSRR, low noise, and programmable bias voltages to allow the biasing to be fine tuned for specific microphone combinations.

When using this MICBIAS pin for biasing or supplying to multiple microphones, avoid any common impedance on the board layout for the MICBIAS connection to minimize coupling across microphones. Table 6-11 shows the available microphone bias programmable options.

Table 6-11 MICBIAS Programmable Settings
P0_R59_D[6:4] : MBIAS_VAL[2:0]P0_R59_D[1:0] : ADC_FSCALE[1:0]MICBIAS OUTPUT VOLTAGE
000 (default)00 (default)2.75 V (same as the VREF output)
012.5 V (same as the VREF output)
101.375 V (same as the VREF output)
00100 (default)3.014 V (1.096 times the VREF output)
012.740 V (1.096 times the VREF output)
101.507 V (1.096 times the VREF output)
010 to 101XXReserved (do not use these settings)
110XXSame as AVDD
111XXReserved (do not use this setting)

The microphone bias output can be powered on or powered off (default) by configuring the MICBIAS_PDZ, P0_R117_D7 register bit. Additionally, the device provides an option to configure the GPIO1 or GPIx pin to directly control the microphone bias output powering on or off. This feature is useful to control the microphone directly without engaging the host for I2C or SPI communication. The MICBIAS_PDZ, P0_R117_D7 register bit value is ignored if the GPIO1 or GPIx pin is configured to set the microphone bias on or off.