So there may be an unknown internal connect?
Answer/Question on your first paragraph:see attachment!so if I connect the switch like in the attachment, I can to a hardware reset with the uC AND with the switch if I understood well?_________________________________________________________________________________________________________
Answer/Question on your second paragraph:I think I missunderstood you! you meant with "to send 3 commands for 3 chips" that when I send data to the first driver I have to send first his adress and then all HIS registers (with his own Shutdown register) with THEIR specific bits, then when I send data to the second driver I have to send first his adress and then his registers (with his own Shutdown register) etc?_________________________________________________________________________________________________________
In the end I have three methods to reset them??? :software with their own register, and hardware with a switch & with the uC?