Data sending and button detection multiplexing circuit and processing method of program thereof

Abstract

A data sending and button detection multiplexing circuit is composed of an MCU, a display screen module, a power supply, an STB signal wire, a CLK signal wire, a DATA signal wire, a button matrix circuit, a pull-down resistor and a filtering capacitor. A data sending circuit and a button detection circuit are multiplexed, and display data sending and button signal detection are realized by time sharing processing of software. By the improvement of the above structure, the number of MCU ports is effectively reduced, and the number of flexible flat cables is reduced, so that the material cost and the processing cost are lowered. The data sending and button detection multiplexing circuit is advantageous by being simple and reasonable in structure, reliable in performance, low in material cost, convenient to process, easy to produce, easy to realize and high in practicability.

Description

technical field [0001] The invention relates to a circuit for multiplexing data transmission and key detection and a processing method for its program. Background technique [0002] In the field of home appliances and consumer electronics in the prior art, display driver and key detection are generally indispensable. In today's era of fierce competition, enterprises are under greater cost pressure. For example, when selecting an MCU, sometimes in order to need a few more ports, it may be necessary to replace a chip with another specification, resulting in waste of resources and rising costs. In addition, in the application where the main board and the key board are separated, the more cables are arranged, the more complicated the processing is, and the cost increases accordingly, which cannot meet the production needs of the enterprise. Therefore, further improvement is necessary. Contents of the invention [0003] The purpose of the present invention is to provide a sim...

AI Technical Summary

Problems solved by technology

In today's era of fierce competition, enterprises are under great cost pressure. For example, when selecting an MCU, sometimes in order to need more ports, it may be necessary to replace a chip with another specification, resulting in waste of resources and rising costs.

In addition, in the application where the main board and the key board are separated, the more cables are arranged, the more complicated the processing is, and the cost will also rise accordingly, which cannot meet the production needs of the enterprise.

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