• TI Thinks Resolved

DS90UB913A-Q1: with ub914 ,crc error ,ub914 not locked ,drop frame

Prodigy 30 points

Replies: 5

Views: 69

Part Number: DS90UB913A-Q1

I am using a ub913 +ub914,  a host mcu was attached in 913 side . the pclk is 80M,the mode we select is  pclk as reference , the main problem is the the image in 914 side drop frame . at the beginning it was 30fps, if no movement ,then  the frame will drop to zero. if movement image , the frame will up again . and the lock pin of ub914 was low.  I read the register 0x0a,0x0b ,there were CRC err counts. at the beginning ,we thought something wrong with POC ,so we supply independent power to ub914 , but same situation .will you pls give some suggestion ?

Thanks

  • Hello Leon,

    Can you share some more information about your setup? A block diagram would be helpful.

    For example, are you using 10 bit, 12 bit HF, or 12 bit LF mode? Are you able to monitor the HSYNC and VSYNC outputs from the imager and 914?

    If you can please share the full register reads from both devices.

  • In reply to Mostafa Shuva:

    plck mode.pdf

    The diagram is  attached . 

    I am using ov10640 +490,the pclk is 72Mh,  using coax cable 10bit mode , mode pin of 913 pull up to 1.8v, the h,v signal is ok. the pclk was bad in 914 side  .the image can be displayed ,but frame will drop

    Thanks

  • In reply to Mostafa Shuva:

    0412.plck mode.pdf

    The diagram is  attached . 

    I am using ov10640 +490,the pclk is 72Mh,  using coax cable 10bit mode , mode pin of 913 pull up to 1.8v, the h,v signal is ok. the pclk was bad in 914 side  .the image can be displayed ,but frame will drop

    Thanks

  • In reply to leon yuan:

    Hi Leon,

    Thanks for providing this. So you are transmitting 10 bit YUV data. When you say PCLK is bad, what were you seeing when you probed on the 914 side? Can you share this?

    Can you clarify what you mean by "movement image"? I think you mean that if the video is static the frame rate is 0fps, and when the scene in the video is dynamic it is 30fps? I'm curious if the PCLK or sync signals correlate to the 0 fps and 30 fps you are seeing in the video frames.

  • In reply to Mostafa Shuva:

    Hello Leon,

    Do you have any feedback on Mostafa's questions? Was your issue resolved?

    Thanks,

    Casey