Re: differential signalling in RS 485
Hi,
from the driver side:
If one output goes high, at the same time the other output goes low.
Allways one driver is high, and one driver is low. (as long as you don´t disable the drivers)
at the receiver side:
the logical state is made with a comparator (with hysteresis) that compares both signals.
So if the non_inverting is larger than the inverting input, then the output is high. Independent if the one is at 1V and the other is at 2V, or the one is at 5V and the other is at 4V.
Klaus