Keyboard circuit shared by two singlechips

Abstract

The invention discloses a keyboard circuit shared by two singlechips, and belongs to the field of instruments. In a single instrument or control unit, a control core adopts the two singlechips; an A singlechip is connected with an isolation driving device, and a B singlechip is also connected with the isolation driving device; the isolation driving device is connected with a serial keyboard scanning circuit, and isolates the two singlechips from the serial keyboard scanning circuit; and the A singlechip is connected with the B singlechip through serial communication. The keyboard circuit has the advantages that: the two singlechips can be communicated with the serial keyboard scanning circuit by controlling the isolation driving device so as to perform keyboard recognition, so the work efficiency of the singlechips is improved, the human-computer dialogue capacity is improved, and the flexibility of using a keyboard is improved.

Description

Technical field: [0001] The invention is a circuit in which two single-chip microcomputers share one keyboard, belongs to the field of instruments and meters, and can be used in various instruments and meters and control units. Background technique: [0002] At present, a single instrument or some control units mostly use a single-chip microcomputer as the control core, and the keyboard part is identified by this single-chip microcomputer. During normal operation, this single-chip microcomputer is responsible for both the keyboard part and other tasks, which seems to be a heavy burden. It affects the working efficiency of single-chip microcomputer and the dialogue efficiency of man-machine, which is a problem existing in practical application at present. Invention content: [0003] The purpose of the invention is to improve the working efficiency of the instrumentation or control unit with two single-chip microcomputers as the core, improve the man-machine dialogue ability...

AI Technical Summary

Problems solved by technology

[0002] At present, a single instrument or some control units mostly use a single-chip microcomputer as the control core, and the keyboard part is identified by this single-chip microcomputer. During normal operation, this single-chip microcomputer is responsible for both the keyboard part and other tasks, which seems to be a heavy burden. It affects the working efficiency of the single-chip microcomputer and the dialogue efficiency of the man-machine, which is a problem in the current practical application.

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