Serial and parallel communication interface extender

Abstract

The invention discloses a serial and parallel communication interface extender. The extender comprises a USB primary port and a USB secondary port, wherein the USB primary port is used for connectinga circuit structure in the extender; the USB secondary port is electrically connected with the USB primary port and is used for connecting a computer side; and the circuit structure in the extender comprises a main control chip which is electrically connected with the USB primary port, a USB serial interface conversion chip and a USB parallel interface conversion chip, which are electrically connected with the main control chip, a serial communication extension port which is electrically connected with the USB serial interface conversion chip and a parallel communication extension port which is electrically connected with the USB parallel interface conversion chip. Compared with the prior art, the extender is simple in structure and small in volume, integrates a function of extending serial communication interfaces and a function of extending parallel communication interfaces, and is capable of converting serial or parallel equipment into plug-and-play USB equipment and satisfying theusing demands of the majority of users.

Description

technical field [0001] The invention relates to an interface expander, in particular to a serial and parallel communication interface expander. Background technique [0002] People engaged in banking, securities and other financial industries have often encountered such embarrassment. Due to the particularity of their work, they often need to connect more display devices or printing devices from the computer, but because the company configures only one computer If there is only one serial communication interface or only one parallel communication interface, they can only connect one display device or printing device, which undoubtedly adds trouble to their daily work and even affects their work efficiency. [0003] Nowadays, considering the ease of use, people are beginning to prefer to use laptops. However, in some respects, using a notebook computer not only fails to bring convenience to users, but adds more troubles to them. For example, at present, in order to pursue p...

AI Technical Summary

Problems solved by technology

However, in some respects, using a notebook computer will not only fail to bring convenience to users, but will add more troubles to them.

For example, at present, in order to pursue portability, notebook manufacturers have greatly reduced the size of notebook computers, and have to discard the serial or parallel communication interfaces that should be configured. When people need to use notebook computers to connect display devices or printing devices, they will find Their own computers do not support the above functions at all, causing inconvenience to them in use

[0004] In addition, external devices on the market today, such as external monitors, external printers, external audio, etc. generally support USB interface access, but external devices that were launched many years ago generally only support serial communication interfaces or parallel communication interfaces. The computer side connected to the above-mentioned old equipment does not have enough interfaces to use the above-mentioned external equipment, and the user can only update the equipment, which undoubtedly increases the cost of use for them

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