DLPU101C december   2020  – may 2023 DLPC900

 

  1.   1
  2. 1 Trademarks
  3.   Read This First
  4. 2 About This Guide
  5. 3 Related Documentation from Texas Instruments
  6. 4 If You Need Assistance
  7. 5 DLP LightCrafter Single DLPC900 EVM Overview
    1. 5.1 Welcome
    2. 5.2 DLP LightCrafter Single DLPC900 Evaluation Module (EVM) Hardware
    3. 5.3 EVM Board
    4. 5.4 Other Items Needed for Operation
    5. 5.5 DLP LightCrafter Single DLPC900 Connections
      1. 5.5.1 DLP LightCrafter Single DLPC900 LED Enable and PWM Outputs
      2. 5.5.2 DLP LightCrafter Single DLPC900 Trigger Input and Output Voltage Selectors
    6. 5.6 DLP LightCrafter Single DLPC900 EVM Flex Cable
    7. 5.7 DLP LightCrafter Single DLPC900 EVM and DMD EVM Assembly
  8. 6 Quick Start
    1. 6.1 Power-up the DLP LightCrafter Single DLPC900 EVM
    2. 6.2 Creating a Simple Pattern Sequence
  9. 7 Operating the DLP LightCrafter Single DLPC900 EVM
    1. 7.1  DLP LightCrafter Single DLPC900 Control Software
    2. 7.2  PC Software
    3. 7.3  System Common Controls
      1. 7.3.1 Operating Mode
      2. 7.3.2 Connected DMD Type
      3. 7.3.3 EVM Information
      4. 7.3.4 Status
    4. 7.4  System Settings
    5. 7.5  Video Mode
      1. 7.5.1 Video Support
    6. 7.6  Pattern Modes
      1. 7.6.1 Menu Bar
      2. 7.6.2 Creating a Pattern Sequence in Pattern On-The-Fly Mode
      3. 7.6.3 Creating a Pattern Sequence in Pre-Stored Pattern Mode
      4. 7.6.4 Reordering a Pattern Sequence using the Edit LUT Feature
        1. 7.6.4.1 Special Considerations for Input Triggers when using the Edit LUT Feature
      5. 7.6.5 Creating a Pattern Sequence in Video Pattern Mode
      6. 7.6.6 Creating a Pattern Sequence With DMD Block Load
      7. 7.6.7 Pattern Settings
    7. 7.7  Batch Files
      1. 7.7.1 Execute Batch File
      2. 7.7.2 Creating and Saving Batch Files
        1. 7.7.2.1 Creating and Saving a Batch File Using the GUI
        2. 7.7.2.2 Creating a Batch File Using a Text Editor
      3. 7.7.3 Loading a Batch File
      4. 7.7.4 Adding a Batch File to the Firmware
    8. 7.8  Peripherals
    9. 7.9  Firmware
      1. 7.9.1 Adding or Removing Patterns from the Firmware
        1. 7.9.1.1 Deleting Images
        2. 7.9.1.2 Adding Images
        3. 7.9.1.3 Adding Both Images and Batch Files
      2. 7.9.2 Reprogram Firmware for a Different Supported DMD
    10. 7.10 Flash Device Parameters
    11. 7.11 JTAG Flash Programming
    12. 7.12 Programming an EDID
  10. 8 Connectors
    1. 8.1  Input Trigger Connectors
    2. 8.2  Output Trigger Connectors
    3. 8.3  DLPC900 UART
    4. 8.4  DLPC900 I2C Port 0
    5. 8.5  DLPC900 I2C Port 1
    6. 8.6  DLPC900 I2C Port 2
    7. 8.7  JTAG Boundary Scan
    8. 8.8  GPIO and PWM
    9. 8.9  Power
    10. 8.10 External Parallel Video Connector
  11. 9 Power Supply Requirements
    1. 9.1 External Power Supply Requirements
  12. 10Safety
    1. 10.1 Caution Labels
  13. 11Revision History

7.6.4.1 Special Considerations for Input Triggers when using the Edit LUT Feature

Input triggers have some special considerations when using the new Edit LUT Feature.  As previously noted, Pattern 3 (“Matt”) has an input trigger associated with it.  When a trigger is added to a pattern, the pattern preceding it, Pattern 2 (“Sue”) in this case, has an all-black pattern loaded at the very end of it so that while the sequence is waiting for the trigger it does not have a pattern displaying during the wait.  This attribute follows Pattern 2 during a reorder.  In our example the first entry (Pattern 2) in the new display order has a 105 µs dark pattern at the end of it.  If Pattern 0 ("Bob") is placed in front of Pattern 3 ("Matt" - the triggered pattern) then the last bit-pattern of Pattern 0 (“Bob”) continues to display in our new display order while waiting for the trigger in Pattern 3 (“Matt”).

The unwanted trigger behavior can be compensated for by one the following methods:

  • Method 1: Consider Pattern 2 and 3 ("Sue" and "Matt") as a set that must always be moved together in your new display order. 
    • - Method 1 is the simplest, but the tradeoff is that these two patterns are not separable without the undesired trigger behavior described above.
  • Method 2: Add a 1-bit all-black pattern with the shortest duration allowed for most DMDs preceding the trigger pattern. See Minimum Exposure in Any Pattern Mode in the DLPC900 Programmer's Guide for details. Now consider this pattern and the triggered pattern following it as a set that must always be moved together. 
    • - Method 2 is more versatile, but the pattern set must always contain a triggered pattern.
  • Method 3: Add a 1-bit all-black pattern with the shortest duration allowed followed by a triggered 1-bit all-black pattern, and remove the trigger from the actual pattern of interest.  These two patterns are now a versatile trigger set that can be used repeatedly wherever a trigger is desired.  Note that since the triggered pattern is black, even if your exposure integration begins with the triggered black pattern there is no light contributing to your exposure.     
    • - Method 3 is the most versatile since this standalone trigger set only has to be placed in the Pattern Index set (on the Pattern Mode page) once but can be used in many positions when defining a new display order.