Harness processing interface analysis

Interface is an essential part of the wire harness processing, let's take a look at the wiring harness processing interface.

1, the classification of the interface

I / O interface is responsible for the main function of the CPU, through the system I / O circuits and peripheral devices linked together, according to the complexity of the circuit and equipment, I / O interface hardware mainly divided into the

following two:

(1), I / O interface chip

Most of these types of ICs are integrated circuits that can input various parameters and commands through the CPU and control related I / O circuits and some simple peripherals for related operations. Common interface chips are: interrupt controller, parallel interface, counter and DMA controller and so on.

(2), I / O interface control card

This type of control card is mainly composed of a number of integrated circuits based on a certain logic to form a component, or directly on the same motherboard as the CPU, it can be a plug-in plug in the system bus slot above.

2, the interface function

Because the computer peripherals are more types, almost the majority of the transmission equipment used, so CPU and I / O devices in the exchange of data there will be the following questions:

(1), the speed mismatch: I / O devices work much slower than the CPU, and because of the different types of speed differences between them is also great, for example, the hard disk transfer speed is much faster than the printer.

(2), the timing mismatch: Each I / O device has its own timing control circuit to transmit data at its own speed, can not be unified with the timing of the CPU.