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DLPC3479: DLPC3479

Kelly Yang
Intellectual 400 points
Part Number: DLPC3479
Other Parts Discussed in Thread: DLPC3437, DLPC3439, DLPDLCR4710EVM-G2, DLP4710, DLP4710EVM-LC

Hello TI Expert,

I have got DLPC3479 chips, and I also DLP4710EVM based on DLPC3479.

I think I could install DLPC3479 on my DLPC4710EVM instead of DLPC3437?

Now I have removed two DLPC3439 and welded DLPC3479, and programmed the flash with the DLPC4710-LC firmware.

But it doesn't work, both of two DLPC are booting and can't complete.

Is there any mistake about my operation?

  • 0
    TI__Mastermind 20045 points
    Hello Kelly,

    Could you please confirm the exact EVM you are using? Is it the DLPDLCR4710EVM-G2?

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Intellectual 400 points
    Hello Kyle,

    Thank you for your reply.
    I have confirmed my EVM is DLP® LightCrafter™ Display 4710 EVM, rather than DLPDLCR4710EVM-G2.
    My DLP4710 EVM user guide link is www.ti.com/.../dlpu034c.pdf
    Also I have developed my own 4710 projector based on DLPC3439.
    My 4710 projector work normally with DLPC3439. But after change to DLPC3479, it can't achieve boot.

    So I want to understand what other changes I need to do, or I must use DLPC3479 based on DLPDLCR4710EVM-G2 or DLP4710EVM-LC.

    Thanks,
    Kelly
  • 0 in reply to Kelly Yang
    TI__Mastermind 20045 points

    Hello Kelly,

    Please take a look at the attached PDF to see the main schematic differences between the DLPC3439 and DLPC3479. Could you also please confirm what version of the DLPC3479 firmware you are using? I would have expected the system to boot-up. Obviously we have the DLP4710EVM-LC to make evaluation of the DLPC3479 easier as well.

    Thanks,

    Kyle

    Block_Diagram_DLPC3479vDLPC3439.pdf

  • 0 in reply to Kyle Rakos
    Intellectual 400 points

    Hello Kyle,

    I noticed one schematic difference is GPIO5 and GPIO6 between the DLPC3439 and DLPC3479, could you confirm what do GPIO5 and GPIO6 means?

    I can confirm I am using the version of firmware is "DLP4710EVM-LC_Firmware_1.1.0.img".

    I understand the DLP4710EVM-LC is the best choice for DLPC3479 and we will develop DLPC3479 follow DLP4710EVM-LC.

    Another question, why I could not find the schematic for DLP4710, because I found the connection are different from DLPC3439 or DLPC3479 to DLPC4710 as the screenshot.

    Best Regars,

    Kelly

     

  • 0 in reply to Kelly Yang
    TI__Mastermind 20045 points

    Hello Kelly,

    You can find a description of the two GPIO signals in the DLPC3479 datasheet. They are needed for controller synchronization. 

    The DLP4710EVM-LC and DLPDLCR4710EVM-G2 both use pin mapping option 2. The original DLPDLCR4710EVM uses pin mapping option 1. I wouldn't expect any of these changes to affect boot-up though.

    Thanks,

    Kyle

  • 0 in reply to Kyle Rakos
    Intellectual 400 points

    Hello Kyle,

    Thank you for you guide, and I have understood GPIO_05 and GPIO_06.

    You mean GPIO_05 and GPIO_06 should not affect DLPC3479 boot-up and I need to check other fault.

    We will develop DLP4710 projector based on  DLP4710EVM-LC, but I think using DLPC3479 on my DLPC3439 board is useful.

    I will continue to check the reason of no boot-up. If you could get more information, please inform me.

    Thanks very much.

    Best Regards,

    Kelly

  • 0 in reply to Kelly Yang
    TI__Mastermind 20045 points

    Hello Kelly,


    Could you upload a waveform capture of the following signals (from the starting edge of PROJ_ON):

    • PROJ_ON (the on/off external signal)
    • PARKZ (signal from the PMIC to the controller)
    • HOST_IRQ (from controller indicating boot status)
    • RESETZ (from PMIC holding the controller in reset)

    I would recommend capturing a time window of approximately 3 seconds.

    Thanks,
    Kyle

  • 0 in reply to Kyle Rakos
    Intellectual 400 points

    Hello Kyle,

    I captured some screenshot of oscilloscope as the below pictures.

    Channel 1 is the signal of PROJ_ON. Channel 2 is the signal of PARKZ.

    Channel 1 is the signal of PROJ_ON. Channel 2 is the signal of M_HOST_IRQ.

    Channel 1 is the signal of PROJ_ON. Channel 2 is the signal of S_HOST_IRQ.

    Channel 1 is the signal of PROJ_ON. Channel 2 is the signal of RESETZ.

    Channel 1 is the signal of PARKZ. Channel 2 is the signal of RESETZ.

    I think the trouble is DLPC3439 could not boot-up, because the signals of M_HOST_IRQ and S_HOST_IRQ are always high level.

    I look forward to your further suggestions.

    Thanks,

    Kelly

  • 0 in reply to Kelly Yang
    TI__Mastermind 20045 points

    Hi Kelly,

    Sorry for the delay. Can you confirm you programmed both flash devices with the proper DLPC3479 firmware? If HOST_IRQ doesn't ever go low that means the initialization hasn't finished. I am also unsure why you are briefly seeing RESETZ drop low then return high.

    Thanks,
    Kyle