Why JX1 and JX2 signal voltage levels swop between 7010 and 7015?

Question

Hi,

I have a design for a PicoZed 7010 and on my carrier card I use two voltages for IO, 3.3v on JX1 and 2.5v on JX2. Now I try to use a PicoZed 7015 with the same carrier, however the voltage levels are now swopped on the signals. Problem is the bank 34 and 35 are swopped between 7010 and 7015 but power supply has not. Hence it is not possible to support PicoZed 7010 and 7015 with the same carrier card.

This is a big big problem for me I separate 2.5 and 3.3 signals. To me it makes more sense if you swop between bank 34 and 35 to also swop power so pins on JX1 are powered from JX1.

I guess there is no way round this but to my mind Avnet have really screwed up here.

Sorry for the rant but I guess I am upset.

Dave

bhfletcher · Accepted Answer

Dave,

Sorry for the trouble. This issue is explained here:

http://microzed.org/content/vcco3435-limitation-between-701020-and-701530

If you are simply trying to add more PL, going to the 7020 is a better option as it is less expensive and has a larger PL than the 7015. You pay a premium for the 7015 due to the transceivers.

Bryan