SCL at 400k is not a good square wave

RE: SCL at 400k is not a good square wave

haakonsh — Thu, 14 Jan 2021 10:33:55 GMT

Also:
1. Your probe typically adds a 12pF capacitive load when attached, requiring stronger pull-ups.

2. Where on your circuit is your probe's ground reference attached? It seems like it has a lower voltage potential than the TWI circuit's ground reference.

RE: SCL at 400k is not a good square wave

awneil — Thu, 14 Jan 2021 00:40:54 GMT

1. Your pullup resistance value is too high. See: electronics.stackexchange.com/.../473799

2. Where do you get these figures from? It's probably allowing for the fact that actual electronic circuits are not perfect.