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ryukich
Newbie
Newbie
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Registered: ‎06-05-2018

VCCAUX_IO unpowered on Zynq RFSoC

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If I have a SERDES+PS-IO only design for a Zynq US+/RFSoC, is it possible to leave VCCAUX_IO unpowered / 0V?  (I realize this may have ESD implications, but if I'm planning on floating the IO backs and just using GTs and PSIO, will I damage or otherwise cause problems).

My initial understanding is that this is OK (as long as VCCO is also 0V and I ensure that I do not accidentally backpower through the IO pins).  Am I correct in this assumption?

 

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gnarahar
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Registered: ‎07-23-2015

@ryukich  DS926 Zynq UltraScale+ RFSoC Data Sheet mentions "VCCAUX_IO must be connected to VCCAUX" under Table 1 and Table 2. I believe you are powering the VCCAUX which is needed since it powers some of the internal circuitry and so do tie VCCAUX_IO to VCCAUX as per recommendation.

- Giri
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gnarahar
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Registered: ‎07-23-2015

@ryukich  DS926 Zynq UltraScale+ RFSoC Data Sheet mentions "VCCAUX_IO must be connected to VCCAUX" under Table 1 and Table 2. I believe you are powering the VCCAUX which is needed since it powers some of the internal circuitry and so do tie VCCAUX_IO to VCCAUX as per recommendation.

- Giri
--------------------------------------------------------------------------------------------------------------------
There's no such thing as a stupid question. Feel free to ask but do a quick search to make sure it ain't already answered.
Keep conversing, give Kudos and Accept Solution when you get one.
-----------------------------------------------------------------------------------------------------------------------

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