LVDS for lcd panel and RocketIO

Nothing to do with it. RocketIO is for serial protocols like InfiniBand, Fibrechannel or PCI Express. The data rates on those is multiple gigabits/second not a puny 80MHz. You can easily run LVDS at 80MHz, I've run it at 266MHz across ribbon cables using a Spartan3 which is slower than a V2P.

LVDS Panels use a multiplexing scheme, whereby the LVDS link runs at a multiple (eg 7 x) of the incoming clock. So, if what you are trying to build is an equivalent to the usual LVDS TX chip (90C383 or similar) then you will need to generate LVDS signals at (max) 80 MHz times 7, ie 560 Mb/sec

I don't know enough about V2Pro to know how you would do this.

Dave

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"Benjamin Menküc" schrieb im Newsbeitrag news:d3dh00$dli$00$ snipped-for-privacy@news.t-online.com...

YES positive nothign todo with RocketIO

there is no 560MHz clock involved ore needed, you can achive 560MBit/s data rate using normal LVDS and DCM the DCM output frequency is 280MHz, that gives you 560Mbit data rate as you use DDR io what effective doubles the datarate.

read the xilinx appnote there is an example of this

antti

Hi,

yes a LVDS clock of 500 MHz would be possible. I have read some appnotes and I guess that I need an external oscillator for that frequency. However I am not sure yet howto generate the fraction of 500 MHz, for the parallel data, 71,42 MHz. I think 500 MHz is to high as input for a DCM.... Thats my question about appnote xapp622 that I have posted in a different topic.

Do I still don't need to do anything with rocketIO at 500 MHz?

regards, Benjamin