SBASA30 December   2020 PCM6480-Q1

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Timing Requirements: I2C Interface
    7. 7.7  Switching Characteristics: I2C Interface
    8. 7.8  Timing Requirements: SPI Interface
    9. 7.9  Switching Characteristics: SPI Interface
    10. 7.10 Timing Requirements: TDM, I2S or LJ Interface
    11. 7.11 Switching Characteristics: TDM, I2S or LJ Interface
    12. 7.12 Timing Requirements: PDM Digital Microphone Interface
    13. 7.13 Switching Characteristics: PDM Digial Microphone Interface
    14. 7.14 Timing Diagrams
    15. 7.15 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Serial Interfaces
        1. 8.3.1.1 Control Serial Interfaces
        2. 8.3.1.2 Audio Serial Interfaces
          1. 8.3.1.2.1 Time Division Multiplexed Audio (TDM) Interface
          2. 8.3.1.2.2 Inter IC Sound (I2S) Interface
          3. 8.3.1.2.3 Left-Justified (LJ) Interface
        3. 8.3.1.3 Using Multiple Devices With Shared Buses
      2. 8.3.2  Phase-Locked Loop (PLL) and Clock Generation
      3. 8.3.3  Analog Input Channel Configuration
      4. 8.3.4  Reference Voltage
      5. 8.3.5  Microphone Bias
      6. 8.3.6  Input DC Fault Diagnostics
        1. 8.3.6.1 Fault Conditions
          1. 8.3.6.1.1 Input Pin Short to Ground
          2. 8.3.6.1.2 Input Pin Short to MICBIAS
          3. 8.3.6.1.3 Open Inputs
          4. 8.3.6.1.4 Short Between INxP and INxM
          5. 8.3.6.1.5 Input Pin Overvoltage
          6. 8.3.6.1.6 Input Pin Short to VBAT_IN
        2. 8.3.6.2 Fault Reporting
          1. 8.3.6.2.1 Overcurrent and Overtemperature Protection
      7. 8.3.7  Digital PDM Microphone Record Channel
      8. 8.3.8  Signal-Chain Processing
        1. 8.3.8.1 Programmable Channel Gain and Digital Volume Control
        2. 8.3.8.2 Programmable Channel Gain Calibration
        3. 8.3.8.3 Programmable Channel Phase Calibration
        4. 8.3.8.4 Programmable Digital High-Pass Filter
        5. 8.3.8.5 Programmable Digital Biquad Filters
        6. 8.3.8.6 Programmable Channel Summer and Digital Mixer
        7. 8.3.8.7 Configurable Digital Decimation Filters
          1. 8.3.8.7.1 Linear Phase Filters
            1. 8.3.8.7.1.1 Sampling Rate: 8 kHz or 7.35 kHz
            2. 8.3.8.7.1.2 Sampling Rate: 16 kHz or 14.7 kHz
            3. 8.3.8.7.1.3 Sampling Rate: 24 kHz or 22.05 kHz
            4. 8.3.8.7.1.4 Sampling Rate: 32 kHz or 29.4 kHz
            5. 8.3.8.7.1.5 Sampling Rate: 48 kHz or 44.1 kHz
            6. 8.3.8.7.1.6 Sampling Rate: 96 kHz or 88.2 kHz
            7. 8.3.8.7.1.7 Sampling Rate: 192 kHz or 176.4 kHz
            8. 8.3.8.7.1.8 Sampling Rate: 384 kHz or 352.8 kHz
            9. 8.3.8.7.1.9 Sampling Rate: 768 kHz or 705.6 kHz
          2. 8.3.8.7.2 Low-Latency Filters
            1. 8.3.8.7.2.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 8.3.8.7.2.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 8.3.8.7.2.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 8.3.8.7.2.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 8.3.8.7.2.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 8.3.8.7.2.6 Sampling Rate: 192 kHz or 176.4 kHz
          3. 8.3.8.7.3 Ultra-Low-Latency Filters
            1. 8.3.8.7.3.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 8.3.8.7.3.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 8.3.8.7.3.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 8.3.8.7.3.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 8.3.8.7.3.5 Sampling Rate: 96 kHz or 88.2 kHz
            6. 8.3.8.7.3.6 Sampling Rate: 192 kHz or 176.4 kHz
            7. 8.3.8.7.3.7 Sampling Rate: 384 kHz or 352.8 kHz
      9. 8.3.9  Automatic Gain Controller (AGC)
      10. 8.3.10 Interrupts, Status, and Digital I/O Pin Multiplexing
    4. 8.4 Device Functional Modes
      1. 8.4.1 Hardware Shutdown
      2. 8.4.2 Sleep Mode or Software Shutdown
      3. 8.4.3 Active Mode
      4. 8.4.4 Software Reset
    5. 8.5 Programming
      1. 8.5.1 Control Serial Interfaces
        1. 8.5.1.1 I2C Control Interface
          1. 8.5.1.1.1 General I2C Operation
          2. 8.5.1.1.2 I2C Single-Byte and Multiple-Byte Transfers
            1. 8.5.1.1.2.1 I2C Single-Byte Write
            2. 8.5.1.1.2.2 I2C Multiple-Byte Write
            3. 8.5.1.1.2.3 I2C Single-Byte Read
            4. 8.5.1.1.2.4 I2C Multiple-Byte Read
        2. 8.5.1.2 SPI Control Interface
    6. 8.6 Register Maps
      1. 8.6.1 Device Configuration Registers
        1. 8.6.1.1 Registers Access Type
        2. 8.6.1.2 Page 0 Registers
        3. 8.6.1.3 Page 1 Registers
      2. 8.6.2 Programmable Coefficient Registers
        1. 8.6.2.1 Programmable Coefficient Registers: Page 2
        2. 8.6.2.2 Programmable Coefficient Registers: Page 3
        3. 8.6.2.3 Programmable Coefficient Registers: Page 4
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Four-Channel Analog Microphone and Four-Channel PDM Microphone Simultaneous Recording Using the PCM6480-Q1
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Example Device Register Configuration Script for EVM Setup
        3. 9.2.1.3 Application Curves
    3. 9.3 What To Do and What Not To Do
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

SPI Control Interface

The general SPI protocol allows full-duplex, synchronous, serial communication between a host processor (the master) and peripheral devices (slaves). The SPI master (in this case, the host processor) generates the synchronizing clock (driven onto SCLK) and initiates transmissions by taking the slave-select pin SSZ from high to low. The SPI slave devices (such as the PCM6480-Q1) depend on a master to start and synchronize transmissions. A transmission begins when initiated by an SPI master. The byte from the SPI master begins shifting in on the slave MOSI pin under the control of the master serial clock (driven onto SCLK). When the byte shifts in on the MOSI pin, a byte shifts out on the MISO pin to the master shift register.

The PCM6480-Q1 support a standard SPI control protocol with a clock polarity setting of 0 (typical microprocessor SPI control bit CPOL = 0) and a clock phase setting of 1 (typical microprocessor SPI control bit CPHA = 1). The SSZ pin can remain low between transmissions; however, the device only interprets the first eight bits transmitted after the falling edge of SSZ as a command byte, and the next eight bits as a data byte only if writing to a register. The device is entirely controlled by registers. Reading and writing these registers is accomplished by an 8-bit command sent to the MOSI pin prior to the data for that register. Table 8-50 shows the command structure. The first seven bits specify the address of the register that is being written or read, from 0 to 127 (decimal). The command word ends with an R/W bit, which specifies the direction of data flow on the serial bus.

In the case of a register write, set the R/W bit to 0. A second byte of data is sent to the MOSI pin and contains the data to be written to the register. A register read is accomplished in a similar fashion. The 8-bit command word sends the 7-bit register address, followed by the R/W bit equal to 1 to signify a register read. The 8-bit register data is then clocked out of the device on the MISO pin during the second eight SCLK clocks in the frame. The device supports sequential SPI addressing for a multiple-byte data write/read transfer until the SSZ pin is pulled high. A multiple-byte data write or read transfer is identical to a single-byte data write or read transfer, respectively, until all data byte transfers complete. The host device must keep the SSZ pin low during all data byte transfers. Figure 8-75 shows the single-byte write transfer and Figure 8-76 illustrates the single-byte read transfer.

Table 8-50 SPI Command Word
BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0
ADDR(6)ADDR(5)ADDR(4)ADDR(3)ADDR(2)ADDR(1)ADDR(0)R/WZ
GUID-E64AC026-AA64-400F-8E93-4EB68357A669-low.gifFigure 8-75 SPI Single-Byte Write Transfer
GUID-9FB52CAD-C59B-4688-98F7-BCDE9172369F-low.gifFigure 8-76 SPI Single-Byte Read Transfer