JAJSKS9 December   2020 PCM6480-Q1

PRODUCTION DATA  

  1. 特長
  2. アプリケーション
  3. 概要
  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 ドキュメントの更新通知を受け取る方法
    4. 12.4 サポート・リソース
    5. 12.5 Trademarks
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 用語集
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
サーマルパッド・メカニカル・データ
発注情報

Phase-Locked Loop (PLL) and Clock Generation

The device has a smart auto-configuration block to generate all necessary internal clocks required for the ADC modulator and the digital filter engine used for signal processing. This configuration is done by monitoring the frequency of the FSYNC and BCLK signal on the audio bus.

The device supports the various output data sample rates (of the FSYNC signal frequency) and the BCLK to FSYNC ratio to configure all clock dividers, including the PLL configuration, internally without host programming. Table 8-6 and Table 8-7 list the supported FSYNC and BCLK frequencies.

Table 8-6 Supported FSYNC (Multiples or Submultiples of 48 kHz) and BCLK Frequencies
BCLK TO FSYNC RATIO BCLK (MHz)
FSYNC
(8 kHz)
FSYNC
(16 kHz)
FSYNC
(24 kHz)
FSYNC
(32 kHz)
FSYNC
(48 kHz)
FSYNC
(96 kHz)
FSYNC (192 kHz) FSYNC (384 kHz) FSYNC (768 kHz)
16 Reserved 0.256 0.384 0.512 0.768 1.536 3.072 6.144 12.288
24 Reserved 0.384 0.576 0.768 1.152 2.304 4.608 9.216 18.432
32 0.256 0.512 0.768 1.024 1.536 3.072 6.144 12.288 24.576
48 0.384 0.768 1.152 1.536 2.304 4.608 9.216 18.432 Reserved
64 0.512 1.024 1.536 2.048 3.072 6.144 12.288 24.576 Reserved
96 0.768 1.536 2.304 3.072 4.608 9.216 18.432 Reserved Reserved
128 1.024 2.048 3.072 4.096 6.144 12.288 24.576 Reserved Reserved
192 1.536 3.072 4.608 6.144 9.216 18.432 Reserved Reserved Reserved
256 2.048 4.096 6.144 8.192 12.288 24.576 Reserved Reserved Reserved
384 3.072 6.144 9.216 12.288 18.432 Reserved Reserved Reserved Reserved
512 4.096 8.192 12.288 16.384 24.576 Reserved Reserved Reserved Reserved
1024 8.192 16.384 24.576 Reserved Reserved Reserved Reserved Reserved Reserved
2048 16.384 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
Table 8-7 Supported FSYNC (Multiples or Submultiples of 44.1 kHz) and BCLK Frequencies
BCLK TO FSYNC RATIO BCLK (MHz)
FSYNC (7.35 kHz) FSYNC (14.7 kHz) FSYNC (22.05 kHz) FSYNC (29.4 kHz) FSYNC (44.1 kHz) FSYNC (88.2 kHz) FSYNC (176.4 kHz) FSYNC (352.8 kHz) FSYNC (705.6 kHz)
16 Reserved Reserved 0.3528 0.4704 0.7056 1.4112 2.8224 5.6448 11.2896
24 Reserved 0.3528 0.5292 0.7056 1.0584 2.1168 4.2336 8.4672 16.9344
32 Reserved 0.4704 0.7056 0.9408 1.4112 2.8224 5.6448 11.2896 22.5792
48 0.3528 0.7056 1.0584 1.4112 2.1168 4.2336 8.4672 16.9344 Reserved
64 0.4704 0.9408 1.4112 1.8816 2.8224 5.6448 11.2896 22.5792 Reserved
96 0.7056 1.4112 2.1168 2.8224 4.2336 8.4672 16.9344 Reserved Reserved
128 0.9408 1.8816 2.8224 3.7632 5.6448 11.2896 22.5792 Reserved Reserved
192 1.4112 2.8224 4.2336 5.6448 8.4672 16.9344 Reserved Reserved Reserved
256 1.8816 3.7632 5.6448 7.5264 11.2896 22.5792 Reserved Reserved Reserved
384 2.8224 5.6448 8.4672 11.2896 16.9344 Reserved Reserved Reserved Reserved
512 3.7632 7.5264 11.2896 15.0528 22.5792 Reserved Reserved Reserved Reserved
1024 7.5264 15.0528 22.5792 Reserved Reserved Reserved Reserved Reserved Reserved
2048 15.0528 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved

The status register ASI_STS, P0_R21, captures the device auto detect result for the FSYNC frequency and the BCLK to FSYNC ratio. If the device finds any unsupported combinations of FSYNC frequency and BCLK to FSYNC ratios, the device generates an ASI clock-error interrupt and mutes the record channels accordingly.

The device uses an integrated, low-jitter, phase-locked loop (PLL) to generate internal clocks required for the ADC modulator and digital filter engine, as well as other control blocks. The device also supports an option to use the BCLK, GPIOx, or the GPIx pin (as MCLK) as the audio clock source without using the PLL to reduce power consumption. However, the ADC performance may degrade based on jitter from the external clock source, and some processing features may not be supported if the external audio clock source frequency is not high enough. Therefore, TI recommends using the PLL for high-performance applications.

The device also supports an audio bus master mode operation using the GPIOx or GPIx pin (as MCLK) as the reference input clock source and supports various flexible options and a wide variety of system clocks. More details and information on master mode configuration and operation are discussed in the Configuring and Operating TLV320ADCx140 as Audio Bus Master application report.

The audio bus clock error detection and auto-detect feature automatically generates all internal clocks, but can be disabled using the ASI_ERR, P0_R9_D5 and AUTO_CLK_CFG, P0_R19_D6, register bits, respectively. In the system, this disable feature can be used to support custom clock frequencies that are not covered by the auto detect scheme. For such application use cases, care must be taken to ensure that the multiple clock dividers are all configured appropriately. Therefore, TI recommends using the PPC3 GUI for device configuration settings; for more details see the PCM6xx0Q1EVM-PDK Evaluation Module user's guide and the PurePath™ Console Graphical Development Suite for Audio System Design and Development development suite.