Hi Alan,
Sorry for taking a while to respond. In the future I highly recommend that
you email all questions to [email protected]. This will not only
help you access a wider pool of resources, but also helps everybody else in
case they run into the same problem down the line.
I don't think I've ever heard of the current consumption spiking by several
amps. What kind of timescale does that occur on?
As far as the FPGA power-on global reset goes, I don't know of a way to hold
it off, but there may be a bitgen parameter. Are you getting switching noise
as you're programming the FPGA?
Thanks,
Henry
Alan Hinton wrote:
Hi Henry,
Hope all is well. Hopefully a quick question. We have noticed that once
in awhile the iBOB FPGA does not get loaded correctly. I believe that we
have narrowed it down to the power supply voltage dipping as the supply
voltage rises which causes the FPGA load to be disrupted. While
tracking this down I have noticed that there are current surges as the
board is running (several amps). Have you noticed or heard anything like
this? Also is there a way to hold off the reset signal (delay it longer)?
Thanks
Alan
Haystack
