Virtex4 Rocket I/O. Power filtering.

Jul 25, 2006 3 Replies

Guys, I'm looking at using some MGT tiles in which just the transmitter is used.



From the user guide:-



Powering Unused Transceivers Since there are clocking resources for each MGT tile that are powered from the AVCCAUXRXB and AVCCAUXMGT, there must be careful placement of used/unused MGTs to reduce the amount of power pins that must be filtered.



From this, and if I don't use any receivers in the column, I deduce that I can leave AVCCAUXRXA unfiltered. Right?



Ta, Syms.


Oh, and BTW, there's an error in the user guide. UG076 v3.0 fig. D-2 shows a LM385 with 100mA going through it. That's bad, abs max is 30mA. Cheers, Syms.

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From the paragraph immediately above the one you quoted, I'm assuming so in my design as well...

Regards,

Mark McDougall, Engineer Virtual Logic Pty Ltd, 21-25 King St, Rockdale, 2216 Ph: +612-9599-3255 Fax: +612-9599-3266

Mark, Yep, the more I read it, the more I'm convinced that's what they mean. A nice little diagram showing what's powered from what would be a nice addition to the user guide! Cheers, Syms.

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