SBAS495D June   2010  – August 2021 PCM9211

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: General
    6. 6.6  Electrical Characteristics: Analog-to-Digital Converter (ADC)
    7. 6.7  Electrical Characteristics: Digital Audio I/F Receiver (DIR)
    8. 6.8  Timing Requirements
    9. 6.9  Typical Characteristics: ADC
    10. 6.10 Typical Characteristics: ADC Internal Filter
    11. 6.11 Typical Characteristics: ADC Output Spectrum
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Device Comparison
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Digital Audio Interface Receiver (DIR)
      2. 7.3.2 Digital Audio Interface Transmitter (DIT)
      3. 7.3.3 Analog-to-Digital Converter (ADC)
      4. 7.3.4 Auxiliary PCM Audio Input and Output (I/O)
      5. 7.3.5 Routing
      6. 7.3.6 Control Interface
      7. 7.3.7 Multipurpose I/O
      8. 7.3.8 PCM9211 Module Descriptions
        1. 7.3.8.1  Power Supply
        2. 7.3.8.2  Power-Down Function
        3. 7.3.8.3  System Reset
        4. 7.3.8.4  PCM Audio Interface Format
        5. 7.3.8.5  ADC Details
          1. 7.3.8.5.1  System Clock
          2. 7.3.8.5.2  ADC: Clock Source Configuration
          3. 7.3.8.5.3  ADC: Standalone Operation
          4. 7.3.8.5.4  Additional ADC Functions
          5. 7.3.8.5.5  ADC: Power Down and Power Up
          6. 7.3.8.5.6  ADC: Audio Interface Mode and Timing
          7. 7.3.8.5.7  Audio Interface Format
          8. 7.3.8.5.8  ADC and Synchronization with Other Clocks
          9. 7.3.8.5.9  Setting the ADC Sampling Frequency with XTI as Clock Source
          10. 7.3.8.5.10 Analog Inputs to the ADC
          11. 7.3.8.5.11 VCOM Output
          12. 7.3.8.5.12 Oversampling Rate
          13. 7.3.8.5.13 External ADC Mode
          14. 7.3.8.5.14 ADC Level Detect and Interrupt
          15. 7.3.8.5.15 Real World Application
        6. 7.3.8.6  Digital Audio Interface Receiver (Rxin0 To Rxin11)
          1. 7.3.8.6.1  Input Details for Pins Rxin0 through Rxin11
          2. 7.3.8.6.2  PLL Clock Source (Built-In PLL and VCO) Details
          3. 7.3.8.6.3  DIR and PLL Loop Filter Details
          4. 7.3.8.6.4  External (XTI) Clocks, Oscillators, and Supporting Circuitry
          5. 7.3.8.6.5  DIR Data Description
          6. 7.3.8.6.6  Channel Status Data, User Data, and Validity Flag
          7. 7.3.8.6.7  DIR: Parity Error Processing
          8. 7.3.8.6.8  DIR: Errors and Interrupts
          9. 7.3.8.6.9  DIR: Sampling Frequency Calculator for Incoming S/PDIF Inputs
          10. 7.3.8.6.10 DIR: Audio Port Sampling Frequency Calculator
          11. 7.3.8.6.11 Output Register Construction
          12. 7.3.8.6.12 DIR: Auto Source Selector for Main Output and AUX Output
          13. 7.3.8.6.13 Non-PCM Data Detection
          14. 7.3.8.6.14 PC/PD Monitor
        7. 7.3.8.7  Digital Audio Interface Transmitter
          1. 7.3.8.7.1 Overview
          2. 7.3.8.7.2 Selection of DIT Input Source
          3. 7.3.8.7.3 DIT Output Biphase
          4. 7.3.8.7.4 Audio Data and Clock
          5. 7.3.8.7.5 Data Mute Function
          6. 7.3.8.7.6 Channel Status Data
          7. 7.3.8.7.7 User Data
          8. 7.3.8.7.8 Validity Flag
          9. 7.3.8.7.9 Standalone Operation
        8. 7.3.8.8  MPIO Description
          1. 7.3.8.8.1 Overview
          2. 7.3.8.8.2 Assignable Signals for MPIO Pins
          3. 7.3.8.8.3 How to Assign Functions to MPIO
          4. 7.3.8.8.4 Selection of Output Source
          5. 7.3.8.8.5 Assignable Signals to MPO Pins
          6. 7.3.8.8.6 MPIO and MPO Assignments
          7. 7.3.8.8.7 MPIO Description
          8. 7.3.8.8.8 MPIO And MPO Assignment: Pin Assignment Details
        9. 7.3.8.9  Default Routing Function (After Reset)
        10. 7.3.8.10 Multichannel PCM Routing Function
          1. 7.3.8.10.1 Overview
          2. 7.3.8.10.2 Initial Setting
          3. 7.3.8.10.3 Output Source Selection
    4. 7.4 Device Functional Modes
      1. 7.4.1 DSD Input Mode
        1. 7.4.1.1 Typical Register Settings
      2. 7.4.2 Serial Control Mode
      3. 7.4.3 Four-Wire (SPI) Serial Control
        1. 7.4.3.1 Control Data Word Format
        2. 7.4.3.2 Register Write Operation
        3. 7.4.3.3 Register Read Operation
        4. 7.4.3.4 Control Interface Timing Requirements
      4. 7.4.4 Two-Wire (I2C) Serial Control
        1. 7.4.4.1 Slave Address
        2. 7.4.4.2 Packet Protocol
        3. 7.4.4.3 Write Operation
        4. 7.4.4.4 Read Operation
        5. 7.4.4.5 Timing Diagram
    5. 7.5 Register Maps
      1. 7.5.1  Error Output Condition and Shared Port Settings Register (address = 20h) [reset = 00000000]
      2. 7.5.2  DIR Initial Settings Register 1/3 (address: 21h) [reset = 00000000]
      3. 7.5.3  DIR Initial Settings Register 2/3 (address: 22h) [reset = 00000001]
      4. 7.5.4  DIR Initial Settings Register 3/3 (address: 23h) [reset = 00000100]
      5. 7.5.5  Oscillation Circuit Control Register (address: 24h) [reset = 00000000]
      6. 7.5.6  Error Cause Setting Register (address = 25h) [reset = 00000001]
      7. 7.5.7  AUTO Source Selector Cause Setting Register (address = 26h) [reset = 00000001]
      8. 7.5.8  DIR Acceptable fS Range Setting and Mask Register (address: 27h) [reset = 00000000]
      9. 7.5.9  Non-PCM Definition Register (address = 28h) [reset = 00000011]
      10. 7.5.10 DTS-CD/LD Sync Word and Period Detection Setting Register (address: 29h) [reset = 00001100]
      11. 7.5.11 INT0 Output Cause Mask Setting Register (Address: 2Ah) [reset = 11111111]
      12. 7.5.12 INT1 Output Cause Mask Setting Register (Address: 2Bh) [reset = 11111111]
      13. 7.5.13 INT0 Output Register (address = 2Ch) [reset = N/A]
      14. 7.5.14 INT1 Output Register (address = 2Dh) [reset = N/A]
      15. 7.5.15 INT0, INT1 Output Polarity Setting Register (address = 2Eh) [reset = 00000000]
      16. 7.5.16 DIR Output Data Format Register (address = 2Fh) [reset = 00000100]
      17. 7.5.17 DIR Recovered System Clock (SCK) Ratio Setting Register (address = 30h) [reset = 00000010]
      18. 7.5.18 XTI Source, Clock (SCK, BCK, LRCK) Frequency Setting Register (address = 31h) [reset = 00011010]
      19. 7.5.19 DIR Source, Secondary Bit/LR Clock (SBCK/SLRCK) Frequency Setting Register (address = 32h) [reset = 00100010]
      20. 7.5.20 XTI Source, Secondary Bit/LR Clock (SBCK/SLRCK) Frequency Setting Register (address = 33h) [reset = 00100010]
      21. 7.5.21 DIR Input Biphase Source Select, Coax Amplifier Control Register (address = 34h) [reset = 11000010]
      22. 7.5.22 RECOUT0 Output Biphase Source Settings Register (address = 35h) [reset = 00000010]
      23. 7.5.23 RECOUT1 Output Biphase Source Settings Register (address = 36h) [reset = 00000010]
      24. 7.5.24 Port Sampling Frequency Calculator Measurement Target Setting Register (address = 37h) [reset = 00000000]
      25. 7.5.25 Port Sampling Frequency Calculator Result Output Register (address = 38h) [reset = N/A]
      26. 7.5.26 Incoming Biphase Information and Sampling Frequency Register (address = 39h) [reset = N/A]
      27. 7.5.27 PC Buffer (Burst Preamble PC Output) Register (address = 3Ah) [reset = N/A]
      28. 7.5.28 PD Buffer (Burst Preamble PD Output) Register (address = 3Ch) [reset = N/A]
      29. 7.5.29 System Reset Control Register (address = 40h) [reset = 11000000]
      30. 7.5.30 ADC Function Control Register 1/3 (address = 42h) [reset = 00000010]
      31. 7.5.31 ADC L-Ch, Digital ATT Control Register (address = 46h) [reset = 11010111]
      32. 7.5.32 ADC R-Ch, Digital ATT Control Register (address = 47h) [reset = 11010111]
      33. 7.5.33 ADC Function Control Register 2/3 (address = 48h) [reset = 00000000]
      34. 7.5.34 ADC Function Control Register 3/3 (address = 49h) [reset = 00000000]
      35. 7.5.35 DIR Channel Status Data Buffer Register (address = 5Ah) [reset = 00000000]
      36. 7.5.36 DIT Function Control Register 1/3 (address = 60h) [reset = 01000100]
      37. 7.5.37 DIT Function Control Register 2/3 (address = 61h) [reset = 00010000]
      38. 7.5.38 DIT Function Control Register 3/3 (address = 62h) [reset = 00000000]
      39. 7.5.39 DIT Channel Status Data Buffer Register (address = 63h) [reset = 00000000]
      40. 7.5.40 Main Output and AUXOUT Port Control Register (address = 6A) [reset = 00000000]
      41. 7.5.41 Main Output Port (SCKO/BCK/LRCK/DOUT) Source Setting Register (address = 6Bh) [reset = 00000000]
      42. 7.5.42 AUX Output Port (AUXSCKO/AUXBCKO/AUXLRCKO/AUXDOUT) Source Setting Register (address = 6Ch) [reset = 00000000]
      43. 7.5.43 MPIO_B and Main Output Port Hi-Z Control Register (address = 6Dh) [reset = 00000000]
      44. 7.5.44 MPIO_C and MPIO_A Hi-Z Control Register (address = 6Eh) [reset = 00001111]
      45. 7.5.45 MPIO_A, MPIO_B, MPIO_C Group Function Assign Register (address = 6Fh) [reset = 01000000]
      46. 7.5.46 MPIO_A Flags or GPIO Assign Setting Register (address = 70h) [reset = 00000000]
      47. 7.5.47 MPIO_B, MPIO_C Flags or GPIO Assign Setting Register (address = 71h) [reset = 00000000]
      48. 7.5.48 MPIO_A1, MPIO_A0 Output Flag Select Register (address = 72h) [reset = 00000000]
      49. 7.5.49 MPIO_A3, MPIO_A0 Output Flag Select Register (address = 73h) [reset = 00000000]
      50. 7.5.50 MPIO_B1, MPIO_B0 Output Flag Select Register (address = 74h) [reset = 00000000]
      51. 7.5.51 MPIO_B3, MPIO_B2 Output Flag Select Register (address = 75h) [reset = 00000000]
      52. 7.5.52 MPIO_C1, MPIO_C0 Output Flag Select Register (address = 76h) [reset = 00000000]
      53. 7.5.53 MPIO_C3, MPIO_C2 Output Flag Select Register (address = 77h) [reset = 00000000]
      54. 7.5.54 MPO1, MPO0 Function Assign Setting Register (address = 78h) [reset = 00111101]
      55. 7.5.55 GPIO I/O Direction Control for MPIO_A, MPIO_B Register (address = 79h) [reset = 00000000]
      56. 7.5.56 GPIO I/O Direction Control for MPIO_C Register (address = 7Ah) [reset = 00000000]
      57. 7.5.57 GPIO Output Data Setting for MPIO_A, MPIO_B Register (address = 7Bh) [reset = 00000000]
      58. 7.5.58 GPIO Output Data Setting for MPIO_C Register (address = 7Ch) [reset = 00000000]
      59. 7.5.59 GPIO Input Data Register for MPIO_A, MPIO_B Register (address = 7Dh) [reset = N/A]
      60. 7.5.60 GPIO Input Data Register for MPIO_C Register (address = 7Eh) [reset = N/A]
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Typical Circuit Connection
      2. 8.1.2 Application Example for Analog Input
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 S/PDIF Ports
        2. 8.2.2.2 PCM Ports
        3. 8.2.2.3 ADC Operation
        4. 8.2.2.4 GPIO/Interrupts
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
7.3.8.6.8 DIR: Errors and Interrupts

The PCM9211 has two pins that are used to inform the system DSP or controller that there is an error, or an interrupt that it should be aware of.

The ERR/INT0 and NPCM/INT1 pins can be configured in these ways:

HARDWARE PINOPTIONS
ERR/INTO0DIR Error (default), INT0 or Hi-Z
NPCM/INT1DIR NPCM (default), INT1 or Hi-Z

When configured as direct DIR error connections (ERR, NPCM), the system audio processor typically treats them as dedicated interrupt pins to change or control audio processing software. An example would be that the system may mute if an ERR signal is detected. Another example is that if the DSP receives an NPCM interrupt, it begins looking for AC-3 or DTS preambles in the incoming encoded S/PDIF stream.

For more advanced users, the two pins can be set up as interrupt sources. The seven interrupt sources (ERROR, NPCM, DTS-CD/LD, Emphasis, Channel Status Start, Burst Preamble Start, fS Calculator Complete) can be masked into Registers INT0 and INT1.

Upon receipt of an interrupt source (such as fS Calculator Complete), INT0 or INT1 performs a bitwise evaluation of AND (&) with an inverted mask [Register 2Ah (INT0) and Register 2Bh (INT1)], then perform an eight-way OR of the data. If the output is 1, then INTx is set to 1, which can be used to trigger an interrupt in the host DSP. The host can then poll the INTx register to determine the interrupt source. Figure 7-17 shows the logic that the device uses to mask the DIR interrupts from the INTx register.

GUID-865B41D9-E8EA-4A8A-847A-262072A22576-low.gifFigure 7-17 DIR Interrupt Mask Logic

Once the register is read, each of the bits in the register (INT0 and INT1) are cleared. If the signal is routed to ERR/INT0 or NPCM/INT1, the output pin is also cleared.

By default, the mask registers are set to mask all inputs; that is, all inputs are rejected, in which case no interrupt can be seen on the output until the mask is changed.

A block diagram for the error output and interrupt output is shown in Figure 7-18.

GUID-6BA9659A-CB12-40E3-BB79-0B0AEC1D6ABF-low.gifFigure 7-18 Error Output and Interrupt Output Block Diagram

There are several allowable error sources from the DIR:

  • Change of incoming S/PDIF sample frequency (Register 25h / EFSCHG)
  • Out-of-range incoming S/PDIF signal (Register 25h / EFSLMT)
  • Non-PCM data (Register 25h / ENPCM)
  • Data invalid flag is the stream (Validity bit = 1) (Register 25h / EVALID)
  • Parity error (Register 25h / EPARITY)
  • PLL unlock (default) (Register 25h / EUNLOCK)

The error sources can be selected using Register 25h.

There are also several interrupts within the device that can be masked:

  • Error in DIR (this error is selectable from the list above in Register 25h)
  • When the device detects non-PCM data
  • When the Emphasis flag in the channel status of the incoming data has been set
  • When DTS-CD data have been detected by the device
  • When the Channel Status (CS) is updated
  • When Burst Preamble (PC) is updated
  • When the sampling frequency is changed.
  • When the analog input crosses the Analog Input Detect level (available only on INT1).

Each interrupt source can be masked by Register 2Ah (INT0) and Register 2Bh (INT1).