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DM3730 ISP timing control

Patrick Marshall
Intellectual 310 points
Other Parts Discussed in Thread: DM3730

 

I have a customer who plans on using a CCD signal processor from ADI with the DM3730, and is aware that the timing signals (HSYNC, VSYNC, PCLK) will be slightly different when using the AD9895 AFE. But it is his understanding that the DM3730 provides the capability to specify framing intervals, so he's hoping that he won't need any external programmable logic to generate the proper timing. Can anyone verify if he is correct and interfacing to the image sensor via AD9895 is straightforward? Or are there pitfalls thta he should be aware of?

thanks,

pm

  • 0
    TI__Mastermind 41665 points

    Patrick Marshall said:
    I have a customer who plans on using a CCD signal processor from ADI with the DM3730, and is aware that the timing signals (HSYNC, VSYNC, PCLK) will be slightly different when using the AD9895 AFE. But it is his understanding that the DM3730 provides the capability to specify framing intervals, so he's hoping that he won't need any external programmable logic to generate the proper timing. Can anyone verify if he is correct and interfacing to the image sensor via AD9895 is straightforward?

    The DM3730 is capable of using various timings for capturing from video sources such as sensors like this,  in particular I believe section 6.5.6.1.3 of the DM3730 TRM and figure 6-111 on the following page will be useful in describing the capability.

    Patrick Marshall said:
    Or are there pitfalls thta he should be aware of?

    In general working directly with sensors on the DM37xx is only recommended when working with a third party with camera expertise, as many of the camera focused blocks in the ISP are not supported, in particular table 1-3 of the TRM outlines what is supported, which only includes the basic parallel capture modes with no sensor specific processing (i.e. CFA, white balance, etc. are not supported). Essentially, capturing the raw data should be possible, but all the image processing would likely have to be done in software which TI does not provide.