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tvp5150am1
Related Posts

  • Forum Post: TVP5150 video decoder in non-standard application

    Dave Jones
    I need to lock to a standard definition video signal (NTSC or PAL) and generate a line locked pixel clock, H sync, V sync, composite blanking and color subcarrier. The TVP5150 looks like it can do all of that except recreating the color subcarrier. I can not find any chips in current production that...
    on Aug 4, 2009

  • Forum Post: Re: TVP5150 video decoder in non-standard application

    Brian Wang
    Dave, The video and imaging section is found through TI applications off of the TI home page. Video encoders and Decoders are on the right hand side under product tree. As for your question, I will direct it to someone in the field who can help you.
    on Aug 6, 2009

  • Forum Post: Re: TVP5150 video decoder in non-standard application

    Larry Taylor
    The genlock GLCO ouput in the TVP5150AM1 has been used primarily in RTC mode 0 (see I2C register 15h) for direct connection to composite video encoders. A typical composite video encoder clocks the Fsc frequency control word transmitted by the TVP5150AM1 into a DDS synthesizer for color subcarrier generation...
    on Aug 11, 2009

  • Forum Post: Re: TVP5150 video decoder in non-standard application

    Dave Jones
    I need to generate a continuous color subcarrier locked to the incoming video. I am guessing that I could connect a 5150's GLCO output to a CPLD and decode the Fsc number, and then feed that into a DDS chip to get a subcarrier sine wave. Do you think that if I decode the reset bit and simply...
    on Aug 11, 2009

  • Forum Post: TVP5150AM1 no NTSC colour lock

    David Ambry
    Hi there, My TVP5150AM1 application does not colour lock on NTSC, but does on PAL. Luminance is always correctly decoded. Sometimes Pr is correctly decoded, but in that case there is no Pb. Some background information: The device is clocked from the crystal output of a 3.3V 8051-family...
    on Aug 17, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Anybody have any comments on this one at all? Need more information? TI, can you confirm it's a problem, or can't reproduce it? Anything at all? Any and all assistance appreciated. Cheers, Dave.
    on Sep 11, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    Kevin Chalmers
    Dave, Are you using this device with a YPbPr input? If so, that may be your issue. The TVP5150 is a composite, Svideo analog video decoder. It does not support component or YPbPr video inputs. You will need a TVP7002 video triple ADC to digitize Y/Pb/Pr. Hope this helps. Regards, Kevin
    on Sep 11, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Kevin Are you using this device with a YPbPr input? No that's fine Kevin, I'm not insulted. I'm sure you must come across a lot of people that don't know composite from component, but I'm not one of them. I've put a THS8200 on the bus from the TVP5150AM1 to reconstruct my...
    on Sep 14, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    Larry Taylor
    Dave, Are you using a nominal NTSC input with color burst present at all times? Regarding potential TVP5150AM1issues: - When an external clock or oscillator is used, 1.8V logic levels should be used. You are seeing the same issue when a crystal is used, so this may not be causing this particular...
    on Sep 14, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Hi Larry, thanks for getting back to me. My responses to yours as follows: Yes, the burst is present at all times. Last night I burned a DVD with SMPTE-75 colour bars in NTSC format and here are some pics of the mighty Bravia hanging off the component out of the 8200 (hope this works): YPrPb...
    on Sep 15, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    Larry Taylor
    Brad, Pb looks OK, so YC separation in the TVP5150AM1 and the crystal are most likely not the issue. Cb and Cr use the same digital data path, so this appears to be ouput DAC or cable related. Does PAL work well consistently? If this were a DAC channel issue, I would suspect both PAL and NTSC to be...
    on Sep 15, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Brad??? Hi Larry, the 20ppm xtal made no difference whatsoever. Yep, PAL is consistently perfect. I am at a loss as to where to go from here.
    on Sep 28, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Is it possible that there is some issue associated with the timing of the 4:2:2 decode? That is, when the THS8200 samples the parallel bus, that would be different between PAL and NTSC?
    on Sep 28, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Should have done this earlier. I'm guilty of postulating causes when I didn't understand the fault. (Where do I hand in my degree?) Here's Pb on the little 'scope: and here's Pr: You can see the Pr signal polarity alternates with every line, effectively cancelling out the...
    on Sep 28, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    Larry Taylor
    David, Other than turning on the TVP outputs, are you using default TVP5150 settings with the THS8200 settings that were sent? I am having trouble figuring out what could be causing Pr to invert every other line. Are you still using a direct connection from the TVP5150 to the THS8200? Are you seeing...
    on Sep 30, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Hi Larry, Yep, I've tried the default settings as well as my own custom settings to force the 5150 into just NTSC mode by loading #00000010B (0x02) into reg 0x28. As you can see from the above CRO shots, the problem has nothing to do with the THS8200. As the R-Y signal is reversed on alternate...
    on Sep 30, 2009

  • Forum Post: Re: TVP5150AM1 no NTSC colour lock

    David Ambry
    Finally got a few moments where I decided to follow this one through (or die in the attempt!) I measured the colour burst frequency and what do you know - it's 4.433MHz - the source is being recoded from NTSC to PAL (NTSC is 3.579MHz), although still as 480i60. I had assumed (fairly I think) it...
    on Oct 1, 2009

  • Forum Post: TVP5150AM1 doesn't acknowledge I2C commands

    Rolf19025
    Hello all, I'm currently working with a TVP5150AM1, which is placed on an own developed PCB. This PCB is based on the reference design in the TVP5150AM1 datasheet. Only difference made is a 22pF capacitor instead of a 33pF which I calculated. The whole design is powered by a Power supply with both...
    on Nov 20, 2009

  • Forum Post: Re: TVP5150 question

    Viet Dinh
    Hello Zhengxu, I believe the 720 active pixels is include the blank pixels and only 704 active video pixels. However, we do have patch for TVP5150AM1 that will output true 720 active pixels if you need. Please let me know. Regards, Viet
    on Apr 13, 2010

  • Forum Post: Re: TVP5150 interrupt questions

    Larry Taylor
    Kailyn, The Power-down mode control in I2C register 02h powers down the ADCs but leaves internal clocking and the processor enabled to retain I2C functionality. To achieve the lowest power state, the PDN pin must be used. When then PDN pin is active low, I2C communication will not function. When...
    on Apr 13, 2010

  • Forum Post: Re: TVP5150 question

    ZHENGXU HUANG
    Thank you very much for your answer ! If it means it is the problem of the Tvp5150AM1 and if I change it to the new Tvp5150AM1 then the problem will be solved? I am looking forward to your answering ! Thank you !
    on Apr 17, 2010

  • Forum Post: Re: TVP5150 question

    Viet Dinh
    Hi Zhengxu, No, it means if you want 720 active pixels output, you need to use firmware patch. Since the TVP5150 has 3 versions, can you give me the ROM version number in the register 82h? If it is 4 then it is TVP5150AM1 and we have a patch for it. Regards, Viet
    on Apr 19, 2010

  • Forum Post: Re: TVP5150 question

    ZHENGXU HUANG
    Thank you for your answer! The value of the ROM version number in the register 82h of my tvp5150 is 4 .So what should I do to solve the problem?How can I get the firmware patch? Thank you very much for your help ,it is very important for me .
    on Apr 20, 2010

  • Forum Post: Re: TVP5150 question

    Viet Dinh
    Hi Zhengxu, I am out of office today and will get back to you on this tomorrow. Regards, Viet
    on Apr 20, 2010

  • Forum Post: Re: TVP5150 question

    ZHENGXU HUANG
    Hi Viet My email is huangzhengxu@mail.whu.edu.cn Thank you for your help Regards, Zhengxu
    on Apr 21, 2010
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