Don't worry about it too much-- AVNET shipped us a rev. of their Xilinx
V21000 eval boards w/ a similar error.  (turns out a 0 ohm resistor was
mistaken for a DNP in their 1.5V regulator network)   They've since fixed
the problem, and have been very nice about replacing the boards, but from
what I can tell, they're a major distributor, so it happens to EVERYONE.

--Josh




"Alex Somesan" <alex.somesan@gmail.com> wrote in message
news:1103055154.853600.241580@z14g2000cwz.googlegroups.com...
> Stupid me!
> You were right!
> Tied VCCINT to 1V5 and all works well. No heat at all.
> I slaped myself a few times after going over the datasheet again, more
> carefuly.
> Anyway, stupid rookie mistake. I must clean my reputation now :).
> Thanks for helping.
>
> Alex.
>

> Stupid me!
> You were right!
> I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
> them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
> the advice. I guess it was obvious to the experinces guys out there. I
> slaped myself a few times after carefully looking over the datasheet. I
> guess now I have to clean up my reputation :).
> Thanks for helping!

Spank yourself with a soldering iron while reciting the complete Cyclone manual 
5 times (including appendix) and you'll receive an absolution from the Almighty 
FPGA...

"Alex Somesan" <alex.somesan@gmail.com> wrote in message
news:1103050426.348763.286140@z14g2000cwz.googlegroups.com...
> Stupid me!
> You were right!
> I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
> them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
> the advice. I guess it was obvious to the experinces guys out there. I
> slaped myself a few times after carefully looking over the datasheet. I
> guess now I have to clean up my reputation :).
> Thanks for helping!
>
> Alex.
>

Good to hear it's working now. Luckily it's only a cheap easily replacable
Cyclone and not a Stratix housed in a 1508 pin FBGA package that's worth
several  thousand $ :)

Jeroen

glen herrmannsfeldt <gah@ugcs.caltech.edu> wrote in news:cpnrgj$qv$1
@gnus01.u.washington.edu:

> 
> 
> Alex Somesan wrote:
> (snip)
> 
>> I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
>> them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
>> the advice. I guess it was obvious to the experinces guys out there. I
>> slaped myself a few times after carefully looking over the datasheet. I
>> guess now I have to clean up my reputation :).
> 
> And now we all know how tough Cyclone is with excess VccINT.
> 
> -- glen
> 

Alex,

Don't let us "old timers" give you too much crap. We've all made this 
mistake in one form or another. It called experience.

-- 
Al Clark
Danville Signal Processing, Inc.
--------------------------------------------------------------------
Purveyors of Fine DSP Hardware and other Cool Stuff
Available at http://www.danvillesignal.com

Stupid me!
You were right!
Tied VCCINT to 1V5 and all works well. No heat at all.
I slaped myself a few times after going over the datasheet again, more
carefuly.
Anyway, stupid rookie mistake. I must clean my reputation now :).
Thanks for helping.

Alex.

Stupid me!
You were right!
I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
the advice. I guess it was obvious to the experinces guys out there. I
slaped myself a few times after carefully looking over the datasheet. I
guess now I have to clean up my reputation :).
Thanks for helping!

Alex.

Stupid me!
You were right!
I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
the advice. I guess it was obvious to the experinces guys out there. I
slaped myself a few times after carefully looking over the datasheet. I
guess now I have to clean up my reputation :).
Thanks for helping!

Alex.

Stupid me!
You were right!
I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
the advice. I guess it was obvious to the experinces guys out there. I
slaped myself a few times after carefully looking over the datasheet. I
guess now I have to clean up my reputation :).
Thanks for helping!

Alex.

Alex Somesan wrote:
(snip)

> I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
> them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
> the advice. I guess it was obvious to the experinces guys out there. I
> slaped myself a few times after carefully looking over the datasheet. I
> guess now I have to clean up my reputation :).

And now we all know how tough Cyclone is with excess VccINT.

-- glen

Stupid me!
You were right!
I cut the PCB traces of the VCCINT pins off the 3V3 rail and straped
them to 1V5 - works perfectly! No heat, no config mess-up. Thanks for
the advice. I guess it was obvious to the experinces guys out there. I
slaped myself a few times after carefully looking over the datasheet. I
guess now I have to clean up my reputation :).
Thanks for helping!

Alex.