XADC

Hai,
In zynq-xc7c020 data sheet DS-187 the power on sequence is PS (VCCPINT, VCCPAUX, VCCPLL, VCCO_DDR, VCCO_MIO0, and VCCO_MIO1) and PL (VCCINT, VCCBRAM, VCCAUX, VCCO, and VCCADC),in this sequence XADC is powered after all the voltages but in ZED board Hardware User's Guide we can see that XADC is powered along with VCCINT(in power sequencing diagram), Can any body please tell me which is the better way to power on the XADC.

Thank you

0 ctammann over 13 years ago

Hi,

There are no specific requirements for the XADC supply. It can be powered at any point during the supply sequencing. That flexibility gives you the option to power it up at any point. Another data point is that if the XADC is unused, the power pins get tied to Vccaux, which is the 2nd recommended rail to come up in the sequence. I point out that use case to further illustrate the independence of powering that rail in relation to the others. Bottom line, power up the XADC in what ever order best fits your architecture selection and don't worry about it's sequence.
Thanks
Chris
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0 arjunbk09 over 13 years ago in reply to ctammann

Thank you ctammann for your reply.
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