Computer Interfacing

Computer interfacing

Within a computer itself the data is transmitted on a set

of parallel conductors, known collectively as the data

bus.

Because all bits of a data word are sent simultane-

ously, the speed of transmission is very much higher than

that for the serial case. The cost is, of course, the greatly

increased complexity of the conductor arrangement or,

in the case of parallel data transmission external to the

computer, the greater cost of cabling.

The nature of serial data

Each bit in a serially transmitted data word is allocated

its own slot in time. Because the transmission of data in

serial form is continuous, but with each dat