Parallel communication bus interface

Abstract

The invention provides a parallel communication bus interface. The interface comprises a connector which is arranged for connecting the parallel communication bus, a master unit of the parallel communication bus and a slave unit of the parallel communication bus, a power supply management circuit which is arranged for strictly controlling the connection sequence of an earth wire, a power supply wire and a signal wire and strictly controlling the delay length for connecting the earth wire to the system and electrifying, and a bus management circuit which is arranged for controlling the master unit of the parallel communication bus or the slave unit of the parallel communication bus to be connect with or separate from the parallel communication bus. The bus management circuit is matched with an address selecting signal sent by the master unit of the parallel communication bus and an electrified signal sent by the power supply management circuit so as to ensure only one slave unit of the parallel communication bus is connected with the parallel communication bus at any moment. The invention provides a parallel communication bus interface which is fit for the parallel communication bus, supports safely and unperturbed on-line connection or cut-off of the bus device and overcomes the complexity for matching the software with the chip of the prior art.

Description

technical field [0001] The invention relates to a communication field, in particular to a parallel communication bus interface. Background technique [0002] The mechanism of online connection / detachment of parallel communication bus devices affects the reliability, ease of use, maintainability and other aspects of electronic products, and has increasingly become an important indicator of various electronic products, especially high-end products. In the industrial control system, various functional units, such as controllers, communication units, and I / O units, exist in the form of modules. The scale and structure of the industrial control system should be flexibly configured according to requirements, so it can support online access The significance of / leaving is even more important. [0003] Parallel communication is a commonly used communication method. Because there are many lines on the parallel bus and the communication mechanism is relatively complicated, it is no...

AI Technical Summary

Problems solved by technology

Although this method is very mature, its limitations are also obvious: the mechanism for the cooperation of software and special-purpose chips is more complicated to implement; special-purpose chips and software also limit the scope of application of this method.

[0006] To sum up, the prior art lacks a general solution for safe and uninterrupted online access / detachment of parallel communication bus devices

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