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You mention a pull-down resistor. Is that not sufficient? I'd suggest a 1kR pull-down is likely to overcome any issue you're seeing.
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No the pull down will not work in this situation. It's a reset line to a Intel Chipset which must not glitch during power up. The pull down only 'limits' the voltage spike, it doesn't get rid of it completely.
The only option here for me is to put external pulldown and insert a Schmitt Buffer to overcome the voltage spike.
One would have hoped that the CPLD could have done that for me.... as it's logic, but obviously it can't. I just see that as a bit backwards as not all people would like a Positive Blip at startup especcialy on a CPU reset line!
Many thanks.
Honored Contributor
