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tvp5154a
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  • Blog Post: New Application Note Releases

    Foe
    The following new TVP/THS application notes are now available from ( http://www.ti.com/ ). Literature Number Release Date Description SLEA073A August 2009 TVP5158 PCB Layout Guidelines SLEA075 September 2009 TVP5151 PCB Layout Guidelines SLEA076 June 2010 THS8134B PCB Layout Guidelines...
    on Jul 29, 2010

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

    BigToast
    Hi Larry, I normally use it in Auto Mode, if I force it to TV mode there is no change in response to external interference. If I force it to VCR mode then the picture 'wobbles' from side to side in normal operation. The break-up of the picture in response to the external interfering signal...
    on Sep 9, 2010

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

    Larry Taylor
    We are not sure if this is the culpret, but we do have a few concerns about your input circuit. The TVP5154 clamp circuit is designed for a 0.1uf coupling cap and 37.5-ohm source impedance ( or less). As a test, you might want to try bypassing the opamps and wiring in a 37.5-ohm-37.5-ohm resistor divider...
    on Sep 9, 2010

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

    BigToast
    Thanks, I've done as you suggested - I've bypassed the op-amps and fed the input video into the top of a 37.5Ohm-37.5Ohm potential divider , the signal for the TVP5154 comes from a 0.1uF capacitor attached to the centre-point of the divider. The performance has definitely improved a bit - I can...
    on Sep 10, 2010

  • Forum Post: 5154A vs 5154?

    Steve15
    I'm seeing a problem with color using the 5154A. I'm working on a DSP board based on a TI EVM reference design utilizing a TI dsp and a 5154. Captured frames have distorted color, and similar colors appear different in different parts of the scene. If I image a blue static mat, I get "rainbow"...
    on Nov 4, 2010

  • Forum Post: Re: 5154A vs 5154?

    Viet Dinh
    Hello Steve, There are no different between TVP5154 and TVP5154A except power up. TVP5154 has a minor power up problem and it was fixed in TVP5154A. Regards, Viet
    on Nov 4, 2010

  • Forum Post: Re: 5154A vs 5154?

    Steve15
    I've seen some postings about installing patches to the 5154A -- what problems do those address?
    on Nov 4, 2010

  • Forum Post: Re: 5154A vs 5154?

    Viet Dinh
    Hi Steve, Our latest patch v2.03 address these issues: Normal 0 false false false MicrosoftInternetExplorer4 Fixed black/white line noise issue that occurred whenever the analog gain changed. Limited contrast setting to...
    on Nov 4, 2010

  • Forum Post: TVP5154 initialize fail??

    Kuve Ma
    Dear Sir, I use TV decoder tvp5154 and set it as below write 0x0F to 0xFE write 0x00 to 0x7F write 0x0F to 0xFE write 0x6D to 0x03 write 0x1B to 0x17 write 0x81to 0x15 write 0x32 to 0x02 write 0x76 to 0x09 write 0x94 to 0x0C write 0xC0 to 0x0A write 0x02 to 0x28 I am run-in test for power...
    on Nov 12, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Hi Lary, Actually, we use TVP5154A (the printing on chip is 02AP4RTG4/TVP5154AI). Does TVP5154A need specific start-up sequence to follow? BR, Rex Liao
    on Nov 15, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Larry Taylor
    Rex, The TVP5154A does not need the special start-up requried for the TVP5154. You do still need to provide the recommeded power-up delays and reset as shown in the datasheet, however. When programming and setting up the individual decoders, make sure that REG FEh is set appropriately. BR, ...
    on Nov 15, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Larry, We alraedy check our design meet datasheet section 7.3 Power-On Reset Timing requirements. And as previous Kuve's description, our I2C communication is very simple, just porgramming all 4 decoders one time when system boot, so the REG FEh always 0xf. We do not understand, why...
    on Nov 16, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Larry Taylor
    Rex, Have you seen this problem on multiple TVP5154A devices or multiple boards? What are your test conditons? Room temperature and nominal power supplies? What is your loop failure rate? This issue should not be occuring with the TVP5154A version. BR, Larry
    on Nov 16, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Larry, This problem occur on multiple boards, this is why we are concerned. Our test environment is at nomal office, has air condition at day, air condition will close when no one at office (maybe pm10:00~AM8:00). We will do overnight test until it fail. The power source is DC12V switch power...
    on Nov 17, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Larry Taylor
    Rex, We will look into this and do some testing here. I think it is a good idea to try the TVP5154 Section 8 procedure to see if it resolves your issue. BR, Larry
    on Nov 17, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Larry, During this week, we try the TVP5154 Section 8 procedure, but the result is still the same. one of the decoder core is still failed. And we read back all REGS of failed decoder core, they are all the same as we configed. This time we aslo read back REG 81h, the value is 0x54h as datasheet...
    on Nov 25, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Dear all, Do you have any staus update? Or shall we not use TVP5154A in autmotive applications? BR, Rex Liao
    on Dec 20, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Larry Taylor
    Rex, We were not able to reproduce any issues here using our EVM and power cycling the 5V DC power to the EVM. The reset on the board was automatically generated by a TLC7733 at power up. When in a failed state, if the failing deoder reports 54h ID in REG 81h, reports horizontal and vertical locked...
    on Dec 20, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Rex Liao
    Larry, The failing deoder core reports 0x54h ID in REG 81h and 0x1Eh in REG 88h. (horizontal and vertical are locked) The status of REG 88h is the same as the other 3 successful decoder core. We can't see any difference on them. Our back-end processor is DM642, we use it for a long time...
    on Dec 21, 2010

  • Forum Post: Re: TVP5154 initialize fail??

    Larry Taylor
    Rex, Can you halt on fail and then reset/restart the DM642 frame capture. There have been some issues reported with some processors related to disruption in the video stream. It is possible that the failing channel is taking longer to establish lock and provide a valid and stable output. Another...
    on Dec 21, 2010

  • Forum Post: TVP5154A fixed gain

    davemunch
    Hi, I need to be able to run the TVP5154A in fixed gain mode. I can turn AGC off using the Analog Channel Controls Register (01h) but I don't see how to control the fixed gain level. Status Register 3 (8ah) shows the level - but it is read only? Any help would be much appreciated.
    on Mar 4, 2011

  • Forum Post: Re: TVP5154A fixed gain

    Viet Dinh
    Hello Davemunch, You can do manual gain by disable the AGC and then use the Contrast control on register 0xC to change the Gain manually. Regards, Viet
    on Mar 5, 2011

  • Forum Post: 5158 v 5154A scaling

    Calum Mackinnon
    Hi, I have a customer who really likes the scaling in the 5154A however they have multiple streams and like the 5158 - thay are also interfacing to a DM8168. Are there any plans to improve the scaling options of the 5158 or is there another multi-channel decoder we could look at? Cheers Calum
    on May 20, 2011

  • Forum Post: Re: 5158 v 5154A scaling

    James Nave
    Hello Calum, The TVP5154A and TVP5158 are the only multi-channel decoders we have in our product line at this time. Video surveillance applications typically use D1 or 1/2-D1 resolution which both devices support. What additional scaling options do you require for your application? Regards...
    on May 20, 2011

  • Forum Post: Re: tvp5154a

    James Nave
    Hello Somaye, If you're using a camera with a standard composite video output (i.e. NTSC, PAL or SECAM), the camera should be connected directly to one of the video input connectors (CH1_AIN, CH2_AIN, CH3_AIN and CH4_AIN) shown on the schematic you provided. If the camera you're using does...
    on Jun 1, 2011
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