• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 33 subscribers
  • Views 706 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Need SDI Serializer

Greg Leeson
Prodigy 120 points
Other Parts Discussed in Thread: CLC021, LMH0030, LMH0040

I need to provide 720p 30 and 720p 60 serialized video output.  Will either the CLC021 or LMH0030 do the job?

  • 0
    TI__Expert 4400 points

    Which specific formats or standards are you using?

    The LMH0030 will encode and serialize 720p60 video per SMPTE 296M (formats 1 & 2), but it does not directly support 720p30.  The LMH0030 serial video output conforms to the SMPTE 292M standard.

    The CLC021 does not support these HD SDI video formats.

    Alternately, the LMH0040 serializer could be used instead.  It is intended to be paired with an FPGA, and offers more flexibility to support any HD or SD SDI video format you need.

    Gary Melchior

  • 0 in reply to Gary Melchior
    Prodigy 120 points

    Thanks Gary.  I've looked at the LMH0040 but the FPGA interface looks way more complicated than a simple parallel bus.  I've also not been able to find any documentation for it.

  • 0 in reply to Greg Leeson
    TI__Expert 4400 points

    The LMH0040 is a little more complicated because you need to program the FPGA to do the encoding and serialization, but we provide example FPGA code to help with this.  This allows you to support many video formats and also provides future-proofing for any future video format changes or additions (due to the programmability of the FPGA).

    The LMH0040 uses a 5-bit wide LVDS data bus plus an LVDS clock for the input, so the data must be preprocessed by the FPGA.  The LMH0040 datasheet is in the product folder here: LMH0040.  The product folder includes a link to download the example FPGA code which explains some of the device's operation with the FPGA, here:
    http://www.ti.com/tool/broadcast_video_serdes_ip

    Alternately, the LMH0030 serializer automatically performs the video encoding and serialization of the parallel data, but may or may not support all of the video formats you need.

    Gary Melchior