Computers and Handshaking
Scanners are connected to their host computers by some kind of interface. Since a scanner sends data to the computer, the interface must carry data not only from the computer to the scanner, but also from the scanner to the computer. For this reason, the interface must be capable of
A method of interaction between the computer and scanners is necessary to prevent the computer from sending data at the same time the scanner is sending data. This interaction method is the basis for governing scanner operation.
EPSON scanner and computer interaction is controlled by a method called handshaking. After the computer sends data to the scanner, it must wait for the proper reply from the scanner before sending more data. Also, when the scanner sends data to the computer, it must wait for the correct response from the computer before sending additional data. Handshaking dictates the method of sending data and how the data is acknowledged by both the computer and scanner.