A digital tube panel and button control circuit and control method thereof

Abstract

The invention discloses a nixie tube panel and key control circuit and a control method thereof. The nixie tube panel and key control circuit comprises a 74CH138 chip, a 74HC164 chip, a current-limiting resistor, a five-bit common-cathode nixie tube, a function indication LED, functional touch keys and a data communication port, wherein the 74HC164 chip is connected with the current-limiting resistor, the 74HC138 chip is connected with the five-bit common-cathode nixie tube, the public end of the function indication LED and the functional touch keys, and the current-limiting resistor is connected with the segment code of the five-bit common-cathode nixie tube and the function indication LED; the control circuit is featured with more reasonable pin resource distribution and more compact module component position. By means of the control method, the key press and display scanning can be performed without delay, and the CPU use ratio is higher.

Description

technical field [0001] The present invention relates to a panel and key control circuit, more specifically, to a digital tube panel and key control circuit; the present invention also relates to a control method of the control circuit. Background technique [0002] The traditional digital tube panel and key control circuit mostly choose 74HC138 and 74HC164 chips as the keyboard signal input and signal output to the driver chip of the digital tube panel, while the traditional 74HC138, 74HC164 chip, digital tube panel and key The connection circuit composed of In this way, it is necessary to wait for a delay when scanning keys and display circuits, which occupies more microcontroller pins and takes longer to scan, especially for high-speed processors, resulting in low CPU utilization, insufficient pin resources, and extended module The disadvantage of difficult leads. Therefore, if the utilization rate of the CPU is improved, releasing the pin resources and making the positio...

AI Technical Summary

Problems solved by technology

[0002] The traditional digital tube panel and key control circuit mostly choose 74HC138 and 74HC164 chips as the keyboard signal input and signal output to the driver chip of the digital tube panel, while the traditional 74HC138, 74HC164 chip, digital tube panel and key The connection circuit composed of In this way, it is necessary to wait for a delay when scanning keys and display circuits, which occupies more microcontroller pins and takes longer to scan, especially for high-speed processors, resulting in low CPU utilization, insufficient pin resources, and extended module Disadvantages of difficult leads

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