Zed Board XADC Auxiliary Channel

How do you access the 16 auxiliary channels of XADC ? Can I use the existing I/O pins as auxiliary inputs ? I couldn't find any options to change the sites of auxiliary channels. Should I use an FMC breakout board to access all analog channels ?

0 jafoste4 over 8 years ago

Hi Jay,
Please refer to this post
http://zedboard.org/content/xadc-reference-design
--Josh
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0 jayasankarvn over 8 years ago in reply to jafoste4

I referred almost all possible documents. But one thing is not clear to me. If I use Vp/Vn or vauxp0/vauxn0 or vauxp8/vauxn8, the external analog signals can be connected through the pins in xadc header. If I want to extend the auxiliary channel number, where do i connect the analog signals ? Should I use an fmc break out board to access those ? Or can I convert the Pmod I/Os to auxiliary channels ? Please do reply. I've been spending time for last two weeks to clear this doubt.
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0 drozwood90 over 8 years ago

If you are using the signals as differential, you only get 8. If you use them as single ended, the _N is the second analog in.

--Dan
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0 jayasankarvn over 8 years ago

It is clearly mentioned in the user manuel that total 17 analog differential channels can be connected. But using xadc header I can connect only 3 differential signals. My doubt is, how to connect those remaining auxiliary channels ? How do I access the pins ?
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0 jafoste4 over 8 years ago

Hello Jay,
Please ask your question over at the digilent forum as they are the main point of contact for educational support.
Regards,
Josh
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