keyboard interface switching device

Abstract

The invention discloses a keyboard interface switching device which is connected with a keyboard interface, and comprises a data selection module, a signal broadening module, a control module and a channel switching module; and the device solves the problems that hot plug is not supported by a PS / 2 interface, and two circuits respectively provided with the PS / 2 interfaces can not be used on one PS / 2 interface at the same time.

Description

technical field

[0001] The invention relates to the field of electronic circuits, in particular to a keyboard interface switching device. Background technique

[0002] The keyboard is the most common computer input device. It is widely used in microcomputers and various terminal equipment. Computer operators input various instructions and data to the computer through the keyboard to direct the work of the computer. The operation of the computer is output to the monitor, and the operator can easily use the keyboard and monitor to talk to the computer, modify and edit the program, control and observe the operation of the computer.

[0003] On the man-machine interface of industrial control equipment, there will be a small keyboard on the device, and an external standard 104-key keyboard is often used. Compared with USB keyboard, PS / 2 interface keyboard has the characteristics of low price, strong compatibility with various operating systems, and strong anti-interference abili...

Examples

Embodiment Construction

[0024] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" herein includes any direct and indirect electrical coupling means. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly elect...

technical field

[0001] The invention relates to the field of electronic circuits, in particular to a keyboard interface switching device. Background technique

[0002] The keyboard is the most common computer input device. It is widely used in microcomputers and various terminal equipment. Computer operators input various instructions and data to the computer through the keyboard to direct the work of the computer. The operation of the computer is output to the monitor, and the operator can easily use the keyboard and monitor to talk to the computer, modify and edit the program, control and observe the operation of the computer.

[0003] On the man-machine interface of industrial control equipment, there will be a small keyboard on the device, and an external standard 104-key keyboard is often used. Compared with USB keyboard, PS / 2 interface keyboard has the characteristics of low price, strong compatibility with various operating systems, and strong anti-interference abili...

Examples

Embodiment Construction

[0024] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" herein includes any direct and indirect electrical coupling means. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly elect...

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