What exactly do you mean by "registers"?
It depends how fast the states are changing, but is your node transmission time only 130us?
100uS events are basically too quick for the autoranging if that's what you're after.
The default firmware is "middle of the road" in terms of how fast it responds. It takes a few ms to sample and react to an overload.
If you were to use interrupts and only focus on speeds, then the response could be less than 1ms.
The analog output will respond very fast. If you manually range and watch the output on a scope you will see 100uS events (eg your transmission) without a problem.
