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How to transmit a 36bits + 4bits at 148.5MHz (from example HDMI 225MHz ADV7106) to FPGA XILINX 5 pairs LVDS DDR

LE NEVE Pascal
Prodigy 10 points
Other Parts Discussed in Thread: LMH0340, LMH0341, LMH0394, DS125RT410

Hi

Goal : Total throughput 40 * 148.5 = 5940Gbps => 1188Gbps / LVDS DDR Link which is compatible with XILINX serie 7 IO of KINTEX and ARTIX

Advantage : 12 / 40 (30%) pin ratio which permits to connect 3 high speed serial video inputs almost 1 in parallel mode

Actually the only solution founded with TI serializers it to use 2 x 90DS187 in single to dual 18b pixel mode which gives a 2 x (6D +C) => 28 pins and a pin ratio of 28 / 40 (70%)

Is there any new serializer design to solve this problem much efficienly?

Thanks

  • TI__Genius 13475 points

    Here are a couple of thoughts on how this might be done.   What you choose will depend on what you want to do with the data at either end...

    There is a Broadcast video standard (SMPTE 424) which supports the transmission of HD over long lengths of coax cable (up to ~200m) - it runs at a serial rate of 2.97Gbps per each cable, and is typically handled as a 20 bit pixel (4:2:2 sampled) at 148.5 MHz word rate.   There is another standard (and I forget the number) which allows two such links to be synchronized, thus allowing for 5.94Gbps to be transported over two coax cables.

    TI supports this standard with a broad variety of products which you can see at www.ti.com/sdi - particular parts which may be of interest are the cable equalizers such as the LMH0394, and the LMH0340/LMH0341 SerDes pair.

    If the distance is not very great, you can use the SerDes that is available within the Kintex and Artix FPGAs, to generate a single serial link at 6Gbps- and use the TI signal conditioning products like the DS125RT410 This part is a 12Gbps equalizer/Retimer/De-emphasis driver, which can operate at sub harmonics, so it will lock to the 6 Gbps stream that the Kintex is generating.   Depending on the transmission medium, I would expect this to work over distances of a few meters.