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| Computers Forum Index » Computer Architecture - FPGA » connecting Xilinx XUP expansion headers... |
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| Author |
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| Alderaan... |
 Posted: Sat Oct 24, 2009 4:53 am |
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Guest
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Hello,
I'm having a problem connecting a Xilinx XUP board with an ADC board.
The scheme is very simple, from XUP board I send a clock (20MHz) to the
ADC board that sends back 16bit parallel samples and a clock (20MHz).
These signals (1.8V) enter to the low speed connector of the Xup board.
The cable I chosed for the connection between boards is an ATA-133 cable.
Actually, that cable is causing the problem because signas at the output
of ADC pins are good but, if I look at them at the end of the cable,
they are corrupted (clock is very bad). I think that cable has too high
capacitance to be driven from the ADC board buffers.
Could you suggest me another kind of cable that I can use with the XUP
low speed connector? Using single cables would be better (I think no
but...)? Could I do something to make things better using the ATA-133 cable?
Thank you in advance.
Bye
Giovanni |
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