The pilot can command autotrim from the sidestick
That's exact .. he command not the trim but trigger the autotrim system (that's not a manual command on the trim)
If for some reason .. the command to elevator is blocked (or the elevator is mechanically blocked) the pilot have no more control on autotrim
In manual the pilot can command the elevator and the trim (they are no more linked by a system)
So he have full authority on the two separate moving surfaces
He can even don't use the elevator for control the pitch ....
So ... really it's
my aircraft