DLPS111D April   2018  – March 2026 DLPC3478

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Electrical Characteristics
    6. 5.6  Pin Electrical Characteristics
    7. 5.7  Internal Pullup and Pulldown Electrical Characteristics
    8. 5.8  DMD SubLVDS Interface Electrical Characteristics
    9. 5.9  DMD Low-Speed Interface Electrical Characteristics
    10. 5.10 System Oscillator Timing Requirements
    11. 5.11 Power Supply and Reset Timing Requirements
    12. 5.12 Parallel Interface Frame Timing Requirements
    13. 5.13 Parallel Interface General Timing Requirements
    14. 5.14 BT656 Interface General Timing Requirements
    15. 5.15 Flash Interface Timing Requirements
    16. 5.16 Other Timing Requirements
    17. 5.17 DMD Sub-LVDS Interface Switching Characteristics
    18. 5.18 DMD Parking Switching Characteristics
    19. 5.19 Chipset Component Usage Specification
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Input Source
        1. 6.3.1.1 Supported Resolution and Frame Rates
        2. 6.3.1.2 3D Display
        3. 6.3.1.3 Parallel Interface
          1. 6.3.1.3.1 PDATA Bus—Parallel Interface Bit Mapping Modes
      2. 6.3.2  Pattern Display
        1. 6.3.2.1 External Pattern Mode
          1. 6.3.2.1.1 8-Bit Monochrome Patterns
          2. 6.3.2.1.2 1-Bit Monochrome Patterns
        2. 6.3.2.2 Internal Pattern Mode
          1. 6.3.2.2.1 Free Running Mode
          2. 6.3.2.2.2 Trigger In Mode
      3. 6.3.3  Device Startup
      4. 6.3.4  SPI Flash
        1. 6.3.4.1 SPI Flash Interface
        2. 6.3.4.2 SPI Flash Programming
      5. 6.3.5  I2C Interface
      6. 6.3.6  Content Adaptive Illumination Control (CAIC)
      7. 6.3.7  Local Area Brightness Boost (LABB)
      8. 6.3.8  3D Glasses Operation
      9. 6.3.9  Test Point Support
      10. 6.3.10 DMD Interface
        1. 6.3.10.1 SubLVDS (HS) Interface
    4. 6.4 Device Functional Modes
    5. 6.5 Programming
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Pattern Projector for 3D Depth Scanning
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2 3D Depth Scanner Using Internal Pattern Streaming Mode
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Curve
  9. 8 Power Supply Recommendations
    1. 8.1 PLL Design Considerations
    2. 8.2 System Power-Up and Power-Down Sequence
    3. 8.3 Power-Up Initialization Sequence
    4. 8.4 DMD Fast Park Control (PARKZ)
    5. 8.5 Hot Plug I/O Usage
  10. 9 Layout
    1. 9.1 Layout Guidelines
      1. 9.1.1 PLL Power Layout
      2. 9.1.2 Reference Clock Layout
        1. 9.1.2.1 Recommended Crystal Oscillator Configuration
      3. 9.1.3 Unused Pins
      4. 9.1.4 DMD Control and SubLVDS Signals
      5. 9.1.5 Layer Changes
      6. 9.1.6 Stubs
      7. 9.1.7 Terminations
      8. 9.1.8 Routing Vias
      9. 9.1.9 Thermal Considerations
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
      2. 10.1.2 Device Nomenclature
        1. 10.1.2.1 Device Markings
      3. 10.1.3 Video Timing Parameter Definitions
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
6.3.2.2.2 Trigger In Mode

Trigger In mode provides a higher level of control to the user for displaying patterns. In this mode, the user determines when to display the pattern by sending an external trigger signal to the DLPC3478 controller. The DLPC3478 controller outputs a Pattern Ready signal to let the user know when the DLPC3478 controller is ready to accept an external trigger signal.

DLPC3478 Trigger In ModeFigure 6-15 Trigger In Mode

  • The DLPC3478 controller sets the Pattern Ready signal high to denote that the DLPC3478 controller is ready to accept the Trigger In signal.
  • The user sends the external trigger input signal to the DLPC3478 controller to begin the display of the next pattern with tExposure (exposure time), tDarkPre and tDarkPost (dark time).
  • The Blue LED is configured to be on for each pattern.
  • TRIG_OUT_1 (Pattern Set Trigger) is configured active high polarity and will have a minimum pulse width of 20 microseconds. TRIG_OUT_1 delay (tD1) is configured with respect to external trigger input (TRIG_IN).
  • TRIG_OUT_2 (Pattern Trigger) is configured active high polarity and stays active during the pattern exposure. TRIG_OUT_2 delay (tD2) is configured with reference to the start of each pattern exposure.