Andy Green wrote: > 1V sounds evil, That's my resistive x100 probe which has an impedance of only 5kOhm, so it affects pull-ups. If I use a capacitative probe (and its long leads), the signal just drowns in ambiental noise.
> No, the reason I asked was because I wondered if too high a pullup > resistance was allowing the interrupt to look asserted at the start of > its slot depending on the data level when it stopped driving, it would > need to be > 1us to make trouble I guess. Hmm, that's a good idea. I think I'll have to sacrifice one of the capacitative probes to give it really short leads ... - Werner
