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TVP5154
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  • Forum Post: Re: TVP5154 Video Decoder configuration question.

    Saeid Sarir
    Werner, TVP5154 is a Video decoder for Composite interlaced TV formats like NTSC or PAL video signals. It is not designed to operate under other progressive resolutions or frame rates or even convert frame rates.. Kindest regards, Saeid
    on May 27, 2009

  • Forum Post: TVP5154 Video Decoder configuration question.

    Nicholas Lee
    [There appears to be no 'video' forum, so I am posting to /etc.] I am trying to configure the TVP5154's registers to enable it to accept signals from my progressive-scan monochrome camera and output signals in VGA format for later display on an LCD monitor. Please can you help me to determine...
    on May 21, 2009

  • Forum Post: Bad PAL Video Quality - TVP5154 & Eval Board

    Mick Soriano
    We're evaluating the TVP5154 video decoder using the TVP5154EVMDVB REV 1.2 evaluation board. We're seeing pretty bad PAL picture quality using color bar patterns. The color bar edges are very jittery/fuzzy. Before we conclude that the TVP5154 IC itself has unacceptable PAL video quality, I'd...
    on Aug 31, 2009

  • Forum Post: Re: TVP5154 questions,pls help

    Viet Dinh
    Hello Kailyn, Can you give me which register you have problem when trying to write and read back? Note, there is some read-only register. Also, the TVP5154 has 4 decoders, have you select the correct decoder when you read back? From power up, it needs at least 100-300ms after reset before writing...
    on Apr 13, 2010

  • Forum Post: Re: TVP5154 questions,pls help

    Kailyn
    Hi,viet; Thank for your reply, and I am sorry to reply to you. Take register 0x03 and 0x15 for example, the process is as follows: first reset, write register 0x03 and 0x15 new value( 0x0D and 0x81) , and this time we read the right value that we wrote, and the output signal is also right, but...
    on Apr 20, 2010

  • Forum Post: Re: TVP5154 questions,pls help

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

  • Forum Post: Re: TVP5154 questions,pls help

    Viet Dinh
    Hello Kailyn, I am sorry that you have problem with read/write to the registers. Can you give me the registers value of FEh and FFh? Those registers is used for selecting read/write to which decoders (TVP5154 has 4 decoders). I also attached the TVP5154 data sheet if you don't have it handy. ...
    on Apr 21, 2010

  • Forum Post: Re: TVP5154 I2C

    Viet Dinh
    Hello Patrick, The timing for your I2C look right to me. The TVP5154 has 4 decoders. To read/write to the TVP5154, the register FEh and FFh have to be written to before read/write. For example: To write to all 4 decoders register 03h value XXh and 15h value YYh , read back 03h of decoder 1, then...
    on Apr 23, 2010

  • Forum Post: Re: TVP5154 questions,pls help

    Viet Dinh
    Hi Kailyn, I wonder you have the same problem as this one: http://e2e.ti.com/support/data_converters/videoconverters/f/376/p/43107/150434.aspx#150434 Though you might want to know. Regards, Viet
    on Apr 23, 2010

  • Forum Post: TVP5154 questions,pls help

    Kailyn
    Dears; I have a customer who used TVP5154 to wirte the register, but he found that if there is one time to write the wrong value of the register, it must reset, otherwise even if rewrite the right value, then the result is still error, so I adivse the customer reset "ms" after power up and...
    on Apr 13, 2010

  • Forum Post: Re: TVP5154 I2C

    ToddToporski
    Hi Viet, It's not stated above, but the assumption is that the device sub-address is written after the device address. For example, if I was writing 11h to register 03h, it would be: I2C data sent as: TVP Device address, TVP Device sub-address, Register Address, Register Data OR BEh 0Fh...
    on Apr 27, 2010

  • Forum Post: Re: TVP5154 I2C

    Viet Dinh
    Hi Todd, According to the TVP5154 data sheet in Sect. 5, the I2C write operation should be: BEh, 03h, 11h. Please double check the data sheet for detail. I don't know what is subaddress 0Fh in here. Regards, Viet
    on Apr 28, 2010

  • Forum Post: Re: TVP5154 I2C

    ToddToporski
    Viet, Sorry, I misunderstood the decoder sub-address from your previous response. I thought the decoder sub-address had to be included along with the device address for each read/write command. After reviewing, I see that the decoder sub-address is really just another register you need to first set...
    on Apr 28, 2010

  • Forum Post: Re: TVP5154 I2C

    Viet Dinh
    Todd, Master Slave Start BE Ack //TVP5154 slave addr + W FE Ack //Address of Write Enables register 0F Ack //Enable writes to all 4 decoders Stop Start BE Ack //TVP5154 slave addr + W 03 Ack //Address of Register 0x03 11 Ack //Data to write to register...
    on Apr 28, 2010

  • Forum Post: TVP5154 I2C

    Viet Dinh
    Todd, Have a look at the attached captures. I have to program the 0x03 register twice in order to get video out and I don't seem to be able to read back from the register (or from any of them). I am able to read and write from the encoder that is on the same I2C network. The...
    on Apr 23, 2010

  • Forum Post: Re: TVP5154 image too bright

    Viet Dinh
    Hello Eric, You are running with AGC and ALC disabled. Please change the register 00h to 15h which will enable AGC and ALC. The ALC (bit 3 and 2) is required to be enabled to get the TVP5154 work properly. Regards, Viet
    on May 26, 2010

  • Forum Post: Re: TVP5154 image too bright

    Eric Lammerts
    Hi Viet, thanks for the quick reply. In the datasheet I see that 15h is the default value for register 01h (I assume you mean register 01h not 00h). And when I read register 01h back I get 15h. Do you recommend programming all registers even if the defaults are fine for my application? (right I only...
    on May 26, 2010

  • Forum Post: Re: TVP5154 image too bright

    Viet Dinh
    Hello Eric, I am sorry, it is my mistake. The register 00h should be 0 for CVBS1 so you are right. The register 01h supposes to be 15h so you are OK. You donot need to programming all the registers if it is same as defaults. Can you also try to disable white peak to see if it helps (set bit 3 of register...
    on May 27, 2010

  • Forum Post: Re: TVP5154 image too bright

    Eric Lammerts
    Hi Viet, does a patch exist for the TVP5154? The chip rom version is reg 82h=02h, reg 83h=00h thanks, Eric
    on May 27, 2010

  • Forum Post: Re: TVP5154 image too bright

    Viet Dinh
    Hi Eric, Yes, we do have patch for TVP5154 which fix the problem the brightness need to be change after contrast get modify but not the one you seen. We havenot seen or get any reported from the field with the image too bright. Regards, Viet
    on May 27, 2010

  • Forum Post: Re: TVP5154 image too bright

    Eric Lammerts
    Hi Viet, should I give that patch a try? Can I download it somewhere? thanks, Eric
    on Jun 1, 2010

  • Forum Post: Re: TVP5154 image too bright

    Viet Dinh
    Hello Eric, Attached is patch version v0202. Please give is a try to see if it helps. Regards, Viet
    on Jun 1, 2010

  • Forum Post: TVP5154 image too bright

    Eric Lammerts
    Hi, sometimes the picture I get from the TVP5154 is way too bright. When I read register 0x8a (AGC) I will see values >100 (I've seen 151, 251, etc). When the picture is OK it's usually 24 or so. The input circuit is as recommended (37R4 + 37R4 divider, followed by 100n cap). The input...
    on May 26, 2010

  • Forum Post: Re: TVP5154 Conducted Immunity: Loss of syncs

    Larry Taylor
    Hi, Do you observe any difference in performance if TV/VCR mode in REG02h is forced to TV mode or VCR mode? Have you been able to quantify the effectiveness of the coax shield at these frequencies? Have you tried different coax cables to see if performance is affected? With the video cable...
    on Sep 8, 2010

  • Forum Post: TVP5154 Conducted Immunity: Loss of syncs

    BigToast
    Hi, I'm EMC testing a product which uses the TVP5154 ( not the TVP5154A ) to decode PAL video and it seems particularly susceptible to conducted interference on the video input/output and mains cables at multiples of 15.625kHz ( most notably 156.25kHz ) The test uses a current injection probe...
    on Sep 8, 2010
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