SLASE12A July   2014  – October 2014 PCM5242

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified System Diagram
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
    1. 6.1 Control Mode Effect On Pin Assignments
    2. 6.2 Pin Assignments
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Timing Requirements: SCK Input
    8. 7.8 Timing Requirements: PCM Audio Data
    9. 7.9 Timing Requirements: XSMT
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Terminology
    4. 8.4 Audio Data Interface
      1. 8.4.1 Audio Serial Interface
      2. 8.4.2 PCM Audio Data Formats
      3. 8.4.3 Zero Data Detect
    5. 8.5 XSMT Pin (Soft Mute / Soft Un-Mute)
    6. 8.6 Audio Processing
      1. 8.6.1 PCM5242 Audio Processing Options
        1. 8.6.1.1 Overview
        2. 8.6.1.2 miniDSP Instruction Register
        3. 8.6.1.3 Digital Output
        4. 8.6.1.4 Software
      2. 8.6.2 Interpolation Filter
      3. 8.6.3 Fixed Audio Processing Flow (Program 5)
        1. 8.6.3.1 Processing Blocks - Detailed Descriptions
        2. 8.6.3.2 Biquad Section
        3. 8.6.3.3 Dynamic Range Compression
        4. 8.6.3.4 Stereo Mixer
        5. 8.6.3.5 Stereo Multiplexer
        6. 8.6.3.6 Mono Mixer
        7. 8.6.3.7 Master Volume Control
        8. 8.6.3.8 Miscellaneous Coefficients
    7. 8.7 DAC and Differential Analog Outputs
      1. 8.7.1 Analog Outputs
      2. 8.7.2 Choosing Between VREF and VCOM Modes
        1. 8.7.2.1 Voltage Reference and Output Levels
        2. 8.7.2.2 Mode Switching Sequence, From VREF Mode to VCOM Mode
      3. 8.7.3 Digital Volume Control
        1. 8.7.3.1 Emergency Ramp Down
      4. 8.7.4 Analog Gain Control
    8. 8.8 Reset and System Clock Functions
      1. 8.8.1 Clocking Overview
      2. 8.8.2 Clock Slave Mode With Master Clock (SCK) Input (4 Wire I2S)
      3. 8.8.3 Clock Slave Mode with BCK PLL to Generate Internal Clocks (3-Wire PCM)
      4. 8.8.4 Clock Generation Using The PLL
      5. 8.8.5 PLL Calculation
        1. 8.8.5.1 Examples:
          1. 8.8.5.1.1 Recommended PLL settings
      6. 8.8.6 Clock Master Mode from Audio Rate Master Clock
      7. 8.8.7 Clock Master from a Non-Audio Rate Master Clock
    9. 8.9 Device Functional Modes
      1. 8.9.1 Choosing A Control Mode
        1. 8.9.1.1 Software Control
          1. 8.9.1.1.1 SPI Interface
            1. 8.9.1.1.1.1 Register Read/Write Operation
          2. 8.9.1.1.2 I2C Interface
            1. 8.9.1.1.2.1 Slave Address
            2. 8.9.1.1.2.2 Register Address Auto-Increment Mode
            3. 8.9.1.1.2.3 Packet Protocol
            4. 8.9.1.1.2.4 Write Register
            5. 8.9.1.1.2.5 Read Register
            6. 8.9.1.1.2.6 Timing Characteristics
      2. 8.9.2 Choosing Between VREF and VCOM Modes
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 High Fidelity Smartphone Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Initialization Script
        3. 9.2.1.3 Application Performance Plot
  10. 10Power Supply Recommendations
    1. 10.1 Power Supply Distribution and Requirements
    2. 10.2 Recommended Powerdown Sequence
      1. 10.2.1 Planned Shutdown
      2. 10.2.2 Unplanned Shutdown
    3. 10.3 External Power Sense Undervoltage Protection mode (supported only when DVDD = 3.3V)
    4. 10.4 PCM5242 Power Modes
      1. 10.4.1 Setting Digital Power Supplies and I/O Voltage Rails
      2. 10.4.2 Power Save Modes
      3. 10.4.3 Power Save Parameter Programming
  11. 11Layout
    1. 11.1 Layout Guidelines
  12. 12Programming and Registers Reference
    1. 12.1 Coefficient Data Formats
    2. 12.2 PCM5242 Register Map
      1. 12.2.1 Detailed Register Descriptions
        1. 12.2.1.1 Register Map Summary
          1. 12.2.1.1.1 Register Map Summary
        2. 12.2.1.2 Page 0 Registers
          1. 12.2.1.2.1  Page 0 / Register 1
          2. 12.2.1.2.2  Page 0 / Register 2
          3. 12.2.1.2.3  Page 0 / Register 3
          4. 12.2.1.2.4  Page 0 / Register 4
          5. 12.2.1.2.5  Page 0 / Register 6
          6. 12.2.1.2.6  Page 0 / Register 7
          7. 12.2.1.2.7  Page 0 / Register 8
          8. 12.2.1.2.8  Page 0 / Register 9
          9. 12.2.1.2.9  Page 0 / Register 10
          10. 12.2.1.2.10 Page 0 / Register 12
          11. 12.2.1.2.11 Page 0 / Register 13
          12. 12.2.1.2.12 Page 0 / Register 14
          13. 12.2.1.2.13 Page 0 / Register 18
          14. 12.2.1.2.14 Page 0 / Register 19
          15. 12.2.1.2.15 Page 0 / Register 20
          16. 12.2.1.2.16 Page 0 / Register 21
          17. 12.2.1.2.17 Page 0 / Register 22
          18. 12.2.1.2.18 Page 0 / Register 23
          19. 12.2.1.2.19 Page 0 / Register 24
          20. 12.2.1.2.20 Page 0 / Register 27
          21. 12.2.1.2.21 Page 0 / Register 28
          22. 12.2.1.2.22 Page 0 / Register 29
          23. 12.2.1.2.23 Page 0 / Register 30
          24. 12.2.1.2.24 Page 0 / Register 32
          25. 12.2.1.2.25 Page 0 / Register 33
          26. 12.2.1.2.26 Page 0 / Register 34
          27. 12.2.1.2.27 Page 0 / Register 35
          28. 12.2.1.2.28 Page 0 / Register 36
          29. 12.2.1.2.29 Page 0 / Register 37
          30. 12.2.1.2.30 Page 0 / Register 40
          31. 12.2.1.2.31 Page 0 / Register 41
          32. 12.2.1.2.32 Page 0 / Register 42
          33. 12.2.1.2.33 Page 0 / Register 43
          34. 12.2.1.2.34 Page 0 / Register 44
          35. 12.2.1.2.35 Page 0 / Register 59
          36. 12.2.1.2.36 Page 0 / Register 60
          37. 12.2.1.2.37 Page 0 / Register 61
          38. 12.2.1.2.38 Page 0 / Register 62
          39. 12.2.1.2.39 Page 0 / Register 63
          40. 12.2.1.2.40 Page 0 / Register 64
          41. 12.2.1.2.41 Page 0 / Register 65
          42. 12.2.1.2.42 Page 0 / Register 80
          43. 12.2.1.2.43 Page 0 / Register 81
          44. 12.2.1.2.44 Page 0 / Register 82
          45. 12.2.1.2.45 Page 0 / Register 83
          46. 12.2.1.2.46 Page 0 / Register 84
          47. 12.2.1.2.47 Page 0 / Register 85
          48. 12.2.1.2.48 Page 0 / Register 86
          49. 12.2.1.2.49 Page 0 / Register 87
          50. 12.2.1.2.50 Page 0 / Register 90
          51. 12.2.1.2.51 Page 0 / Register 91
          52. 12.2.1.2.52 Page 0 / Register 92
          53. 12.2.1.2.53 Page 0 / Register 93
          54. 12.2.1.2.54 Page 0 / Register 94
          55. 12.2.1.2.55 Page 0 / Register 95
          56. 12.2.1.2.56 Page 0 / Register 108
          57. 12.2.1.2.57 Page 0 / Register 109
          58. 12.2.1.2.58 Page 0 / Register 114
          59. 12.2.1.2.59 Page 0 / Register 115
          60. 12.2.1.2.60 Page 0 / Register 118
          61. 12.2.1.2.61 Page 0 / Register 119
          62. 12.2.1.2.62 Page 0 / Register 120
          63. 12.2.1.2.63 Page 0 / Register 121
          64. 12.2.1.2.64 Page 0 / Register 122
          65. 12.2.1.2.65 Page 0 / Register 123
          66. 12.2.1.2.66 Page 0 / Register 124
          67. 12.2.1.2.67 Page 0 / Register 125
        3. 12.2.1.3 Page 1 Registers
          1. 12.2.1.3.1 Page 1 / Register 1
          2. 12.2.1.3.2 Page 1 / Register 2
          3. 12.2.1.3.3 Page 1 / Register 5
          4. 12.2.1.3.4 Page 1 / Register 6
          5. 12.2.1.3.5 Page 1 / Register 7
          6. 12.2.1.3.6 Page 1 / Register 8
          7. 12.2.1.3.7 Page 1 / Register 9
        4. 12.2.1.4 Page 44 Registers
          1. 12.2.1.4.1 Page 44 / Register 1
        5. 12.2.1.5 Page 253 Registers
          1. 12.2.1.5.1 Page 253 / Register 63
          2. 12.2.1.5.2 Page 253 / Register 64
      2. 12.2.2 PLL Tables for Software Controlled Devices
  13. 13Device and Documentation Support
    1. 13.1 Community Resources
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

6.1 Control Mode Effect On Pin Assignments

The PCM5242 supports control from I2C, SPI and Hardware Modes (referred to as HW mode). Selection of modes is done using Mode1 and Mode2 pins. (See Table 1)

SPI Mode is selected by pulling MODE1 to DVDD.

I2C Mode is selected by pulling MODE1 to DGND and Mode2 to DVDD.

Hardware Control Mode is selected by pulling both MODE1 and MODE2 pins to DGND.

6.2 Pin Assignments

po_rhb32_i2c_pcm52xx.gifFigure 1. I2C Control
po_rhb32_hwc_pcm52xx.gifFigure 3. Hardware Control
32-Pin RHB (QFN, Top View)
po_rhb32_spi_pcm52xx.gifFigure 2. SPI Control

Table 1. PCM5242 Pin Functions

PIN I/O DESCRIPTION
MODE, NAME PIN
I2C SPI HW
XSMT 1 I Soft mute control(2) Soft mute (Low) / soft un-mute (High)
LDOO 2 - Internal logic supply rail pin for decoupling, 1.8V
DGND 3 - Digital ground
DVDD 4 - Digital power supply, 3.3V or 1.8V
CPVDD 5 - Charge pump power supply, 3.3V
CAPP 6 O Charge pump flying capacitor pin for positive rail
CPGND 7 - Charge pump ground
CAPM 8 O Charge pump flying capacitor pin for negative rail
VNEG 9 O Negative charge pump rail pin for decoupling, -3.3V
OUTLP 10 Positive Differential Analog output from DAC left channel
OUTLN 11 Negative Differential Analog output from DAC left channel
OUTRN 12 Negative Differential Analog output from DAC right channel
OUTRP 13 Positive Differential Analog output from DAC right channel.
AVDD 14 - Analog power supply, 3.3V
AGND 15 - Analog ground
VCOM 16 O I2C, SPI VCOM output (Optional mode selected by register; default setting is VREF mode.) When in VREF mode (default), this pin ties to GND. When in VCOM mode, decoupling capacitor to GND is required.
DEMP I HW DEMP: De-emphasis control for 44.1kHz sampling rate: Off (Low) / On (High)
SDA 17 I/O I2C Data for I2C(1)(2)
MOSI I SPI Input data for SPI(2)
ATT2 HW Digital gain and attenuation control pin
SCL 18 I I2C Input clock for I2C(2)
MC SPI Input clock for SPI(2)
ATT1 HW Digital gain and attenuation control pin
GPIO5 19 I/O I2C, SPI General purpose digital input and output port (3)
ATT0 HW Digital gain and attenuation control pin
GPIO4 20 I/O I2C, SPI General purpose digital input and output port (3)
MAST HW I2S Master clock select pin : Master (High) BCK/LRCK outputs, Slave (Low) BCK/LRCK inputs
GPIO3 21 I/O I2C, SPI General purpose digital input and output port (3)
AGNS HW Analog gain selector : 0dB 2VRMS output (Low), -6dB 1VRMS output (High)
ADR2 22 I/O I2C 2nd LSB address select bit for I2C(3)
GPIO2 SPI General purpose digital input and output port (3)
GPO O HW General Purpose Output (Low level)
MODE1 23 I Mode control selection pin(2)
MODE1 = Low, MODE2 = Low : Hardwired mode
MODE1 = Low, MODE2 = High: I2C mode
MODE1 = High: SPI mode
MODE2 MODE2 24 I2C, HW MODE2 (See definition in Mode 1 description)
MS I SPI MS pin (chip select for SPI)
GPIO6 25 I/O I2C, SPI General purpose digital input and output port
FLT I HW Filter select : Normal latency (Low) / Low latency (High)
SCK 26 I System clock input(2)
BCK 27 I/O Audio data bit clock input (slave) or output (master)(2)
DIN 28 I Audio data input(2)
NC 29 - No connect
30 -
LRCK 31 I/O Audio data word clock input (slave) or output (master)(2)
ADR1 32 I/O I2C LSB address select bit for I2C
MISO (GPIO1) SPI Primary output data for SPI readback. Secondary; general purpose digital input/output port controlled by register
FMT HW Audio format selection : I2S (Low) / Left justified (High)
(1) Open-drain configuration in out mode.
(2) Failsafe LVCMOS Schmitt trigger input.
(3) Internal Pulldown

Table 2. Gain and Attenuation in Hardwired Mode

ATT PIN CONDITION
(ATT2 : ATT1 : ATT0)		 GAIN AND ATTENUATION LEVEL
( 0 0 0 ) 0 dB
( 0 0 1 ) + 3 dB
( 0 1 0 ) + 6 dB
( 0 1 1 ) + 9 dB
( 1 0 0 ) + 12 dB
( 1 0 1 ) + 15 dB
( 1 1 0 ) - 6 dB
( 1 1 1 ) - 3 dB