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DLPC3479: TRI_OUT2 has no output

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Prodigy 80 points
Part Number: DLPC3479
Other Parts Discussed in Thread: DLP4710LC, , DLPA3005

Tool/software:

Hello!
I'm using External Pattern Mode, 8-bit monochrome patterns。
I'm uses the PARALLEL RGB interface, the timing is RGB888, and the external input is 1920*1080@60hz.
The hardware architecture is dlpc3479 + dlpa3005 + dlp4710lc.
The DLP4710LC can display pictures normally, but TRI_OUT1 has output, while TRI_OUT2 has no output
The following is the register I configured, and the corresponding value, to help me see if there is a problem。
ADDR value
8'h92 8'h02,8'h00,8'h04,8'h00,8'h00
8'h92 8'h03,8'h00,8'h00,8'h00,8'h00
8'h96 8'h00,8'h18,8'h00,8'hE0,8'h00,8'h00,8'h00,8'h80,8'h01,8'h00,8'h00,8'h40,8'h00,8'h00,8'h00
8'h05 8'h03

Thank you very much!

  • 0
    TI__Genius 11955 points

    Hello!

    Thanks for reaching back out to us through E2E!

    Looking at your Pattern Configuration command (address 0x96) there seem to be issues:

    Byte 1: 0x00 -1-bit mono. You've mentioned using 8-bit monochrome, which is it?

    Byte 2: 0x18 - 24 patterns. With 8-bit patterns there is a max of 3 (3x8bit)

    Byte 3: 0x00 - LEDs disabled

    Byte [7:4]: 0x000000E0 (224) Illumination Time (us)

    Byte [11:8] - 0x00000180 (384) Pre-illumination Time (us)

    Byte [15:12] - 0x00000040 (1024) Post-illumination Time (us)

    The timings are all appropriate for 1-bit monochrome, I'm thinking there's just a typo in your mentioning of 8-bit monochrome patterns.

    If this is the case, you claim that TRI_OUT2 has no output on J48 pin 4? This should be next to ED45. Are you seeing TRI_OUT1 on J48 pin 7?

    How are the 1-bit patterns being sent to your system?

    I've connected my laptop and confirmed that your settings work with a Blue LED for convenience as well as without any LEDs enabled.

    Best,

    Aaron