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Jan 5, 2015 at 17:59 vote accept crocboy
Oct 21, 2014 at 17:31 comment added Jeff Bell Logic analyzers tend to square-up the waveform. Do you have access to an oscilloscope? Does it do the same thing at the pin with no wires attached?
Oct 21, 2014 at 15:30 comment added crocboy I'm getting what looks to be a good square wave (seen with logic analyzer), but every few ms it goes bonkers and gets irregular. Then it goes back to normal. This cycle occurs regularly, I wonder if it has something to do with the signal integrity.
Oct 21, 2014 at 5:00 history edited Jeff Bell CC BY-SA 3.0
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Oct 21, 2014 at 5:00 comment added Russell McMahon I agree with Jeff. It's very high for a plug in breadboard but as they are clock signals and not low level signal signals you can probably make it work OK with careful layout, short leads etc - as jeff said. .
Oct 21, 2014 at 4:53 history answered Jeff Bell CC BY-SA 3.0