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DS90UB933-Q1: Serializer Selection Based on Camera/Imager

Daniel_Foncannon
Prodigy 70 points
Part Number: DS90UB933-Q1

Hi Team,

I am working on a project for a customer and am trying to determine which serializer would be best suited for their imager. They are using OV9716, 120dB mode. I believe the color depth will be somewhere in the order of 24 bits for 120dB mode. The camera should be 1.4MP, 30FPS.

That being said, what I don’t currently understand is how to calculate if the 913A or 933 is sufficient based on overhead and blanking times, etc. Is the formula just: (Resolution) x (Frame Rate) x [(Color Depth) + Blanking/Overhead Bits] i.e. (1.4MP) x (30FPS) x (24bits).

If so, we get 1.008Gbps and should therefore use the 933. Can you please verify?

Thank you and regards,

Dan

 

  • 0
    TI__Genius 12705 points
    Hello,
    I assume this is parallel interface camera, and the data can be sent in 2x 12 bit RAW frames. If this is the case, the 933 should have sufficient bandwidth to support this data/frame rate with 100MHz PCLK = 100M x 12bits = 1.2Mbps, since at 30 FPS the net datarate would be roughly half the MP.
    Calculation would be performed as:
    Net Data rate = HRES x VRES x (1+ blanking) * BPP * FR
    where HRES and VRES are in pixels, BPP = bits per pixel and FR = Frame rate.
  • 0 in reply to Liam Keese
    Prodigy 120 points
    Hello Liam Keese,

    W are using OV10642 120dB Active array size 1280x1080 Camera. we wanted to know 933 is feasible or not.
    pixels per line 1280 , no. of lines 1080, 36 frames per second, 12 bits per pixel , blanking is 1543
    could you let us know how to calculate net data rate on serializer.
    also how to consider line blanking and frame blanking for MIPI 400Mhz.

    Regards,
    Narasimha
  • 0 in reply to Narasimha venkataravanappa
    TI__Genius 12705 points
    Hello,
    With 1280 x 1080 this should be feasible at 36 fps and 12bits per pixel as the datarate assumming 10% blanking would only be ~ 657 Mbps.

    The net datarate can be calculated based on HRES *VRES * (1+ %blank) * bpp * fps. Please reference 933 datasheet for calculation regarding PCLK.
    If using a MIPI CSI-2 deserializer, the VSYNCH and HSYNCH inputs to the 933 should be consistent with Line Valid and Frame Valid.