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DLPLCR9000EVM: Maximum external input pattern rate

Lorenzo Cabona
Prodigy 30 points

Part Number: DLPLCR9000EVM

Hi,

I'm asking for your help. I think I'll use a DLPLCR9000EVM.

I am interested in showing much more than 400 (which is the maximum number of loadable patterns) 1-bit patterns at the maximum speed possible.

So, I think I'm going to be forced to use the VIDEO PATTERN MODE.

On the "DLP® LightCrafter™ 6500 and 9000 Evaluation Module (EVM) User's Guide" I couldn't find any indications, but the

Table 2-85 on "DLPC900 Programmer's Guide Programmer's Guide" it says that the Maximum external input for video pattern mode is 

2880 Hz for pattern 1-bit. 

Does the DLPLCR9000EVM  allow me to go up to 2880 Hz? Using which Interface (USB, HDMI, I2C or DP )?

If I used pre-loaded patterns, I would be forced to load 400 pattens (1-bit ) at a time, what would be the time needed to load them?

Thanks and regards,

Lorenzo

  • 0
    TI__Expert 3020 points

    Hi Lorenzo,

    Welcome to the E2E forum!

    We are looking into your queries and will get back to you soon.

    Best regards,

    Shivakumar

  • 0
    TI__Mastermind 43165 points

    Hello Lorenzo,

    You can use HDMI for up to 60 frames input rate.  You must use DP for 120 frames input.  This will allow the 2880 Hz listed.

    I2C and USB do not have the bandwidth to transfer patterns at that rate.

    Pre-stored patterns are stored in flash and are loaded into DDR memory when you start the mode.  It is fast, but there are no published numbers on how fast.

    All 400 patterns are loaded into memory before they start displaying.  If you use Pattern on-the-fly, then depending on how compressible the patterns are it can be quite fast or if they are very complex and do not compress well, it can be several minutes to load a set of 400 patterns.

    Fizix