SPRUIT0A December   2019  – May 2020

 

  1.   Jacinto7 EVM Infotainment Expansion
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 Key Features
    3. 2 Infotainment Expansion Board Overview
      1. 2.1 Infotainment Expansion Board Identification
      2. 2.2 Infotainment Expansion Board Component Identification
    4. 3 Infotainment Expansion Board - User Setup/Configuration
      1. 3.1 Interfacing Infotainment Expansion Board With CP Board
        1. 3.1.1 Board Assembly Procedures
      2. 3.2 Power Requirements
      3. 3.3 EVM Reset/Interrupt Push Buttons
      4. 3.4 EVM Configuration DIP Switch
    5. 4 Infotainment Expansion Board Hardware Architecture
      1. 4.1  Infotainment Expansion Board Hardware Top Level Diagram
      2. 4.2  Expansion Connectors
      3. 4.3  Board ID EEPROM
      4. 4.4  Audio Codec Interface
        1. 4.4.1 Port Mapping
      5. 4.5  FPD link De-Serializer Interface (Audio)
      6. 4.6  DIR Interface
      7. 4.7  DIT Interface
      8. 4.8  Legacy Audio/JAMR3 Connectors
      9. 4.9  VIN/VOUT Mux Selection
      10. 4.10 HDMI Interface Bridge
      11. 4.11 FPD Link Display Serializer Interface
      12. 4.12 Parallel Camera Interface
        1. 4.12.1 Camera Clock
        2. 4.12.2 LI Camera Module Connector
        3. 4.12.3 OV Camera Module Connector
  2.   A Jacinto7 EVM Interface/IO Mapping
    1.     A.1 Interface Mapping
    2.     A.2 Infotainment Board GPIO Mapping
    3.     A.3 I2C Address Mapping
  3.   Revision History

4.5 FPD link De-Serializer Interface (Audio)

Infotainment expansion board uses FPD link III De-serializer IC Mfr. Part# DS90UB926QSQE for recover the audio signals from the FPD-Link interface. The de-serializer recovers up to eight digital audio channels, frame sync plus I2S channel across digital link. HSD connector Mfr. Part# D4S20G-400A5-C is used to receive the input signal.

The recovered eight audio data signal and AFSX connected directly to McASP port of J7 SoC through CP board B-B connector. And I2S signals from de-serializer are connected to McASP port of J7 SoC through DIR/FPDLink MUX selection IC(U17) on Infotainment board. For MUX channel selection through GPIO Expander, see Section A.2.

spruit0-dir-tuner-mux-selection.gifFigure 11. DIR/FPDLink Mux Selection

The I2C signals from SOC being used for controlling/configuring of the de-serializer and remote device. A 57.6KΩ Pull up and 121K Ω pull down is provided on ID[X] pin to set the 7‘b I2C address to 0x3B.

The default mode set for the de-serializer is mode0. For the resistor population option to set different modes, see Figure 12.

Power +12 V is provided to the HSD connector using a power switch TPS1H100AQPWPRQ1 to power an external board. By default, power switch is OFF and it can be enabled by a GPIO expander signal (PWR_SW_UB926).

spruit0-fpd-lin-de-serializer.gifFigure 12. FPD Link De-Serializer Interface