What is the input range of common fly-by-wire controls?
A320
Max/min stick g:

+2.5 g to -1 g for clean configuration.
+2 g to 0 for other configurations.

Roll:

The roll rate requested by the pilot during flight is proportional to the sidestick deflection, with a maximum rate of 15 °/s when the sidestick is at the stop.

And as it says, is proportional to deflection. (Source: A320 FCOM)
777
I checked the 777's FCOM but did not find similar stated values/explanation.
Since there are trim switches on the 777's yoke, unlike the lack thereof on the A320's stick, the trim switches change the reference speed, and the thrust levers command pitch change. It's designed to mimic, say a Cessna: adding power pitches up; trimming down increases speed.

The trim reference speed is the speed at which the airplane would eventually stabilize if there were no control column inputs. Once the control column forces are trimmed to zero, the airplane maintains a constant speed with no column inputs. Thrust changes result in a relatively constant indicated airspeed climb or descent, with no trim inputs needed unless airspeed changes.