This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP9000: dlpc900

Part Number: DLP9000

I have a dual dlp900 controller setup with 2560x1600 resolution.  I would like to operate with 66.6666Hz frame rate so that I can have three 5msec patterns on 15msec frame boundaries giving me an effective 200Hz pattern rate. 

I have more resolution than I need.  Would it be possible to alter the EDID to operate at 66.6666Hz with reduced horizontal and/or vertical dimensions so that I don't exceed the 141MHz pixel clock limit?  If so how do I do that?

  • Hello Joe,

    This will depend on what the IT receiver is capable of.  My understanding is that the IT6535 receiver is designed for 60 Hz on DP.  

    To alter the EDID you will need to start with the DP EDID found by default in "C:\Texas Instruments-DLP\DLPC900REF-SW-5.1.0\DLPC900REF-SW-5.1.0\DLPC900REF-EDID\DLP9000-C900REF-EDID" as LCR9000_DP_EDID.txt.  (Be sure to save a backup copy)

    In that file strip out all the I2C_CONFIG line and all the DELAY lines, and strip out "I2C_PASSTHRU: 0x11 0x00 0x01 0xa0 0x00", leaving only the last 17 hex values.  This is what the initial 0x11 is indicating on the PASSTHRU lines.

    I cannot remember if you have to remove all the line breaks or not, but it should be able to be read in to an EDID editor.

    Once you change it to what you want, then you will have to repopulate it back into the format of the EDID batch file (17 hex values per line)

    To program it to the EDID follow the instructions for DP in the Readme.txt file you found in the EDID directory

    There is no guarantee that the IT6535 receiver will be able to do what you ask, but it is worth a try.  

    If it does not work, you can use the backup EDID batch file copy to restore the original DP EDID.


  • where do I get an EDID editor?

  • Hello Joe,

    We cannot provide an EDID editor.  There are a number of ones that show up with a quick web search.  You may want to see how well they are rated by users.  Many of them are free.

    I see a few that are geared toward custom resolutions.