Nixie tube panel and key 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 invention relates to a panel and a key control circuit, more specifically, to a digital tube panel and a key control circuit; the invention also relates to a control method of the control circuit. Background technique [0002] Traditional nixie tube panel and button control circuit choose 74HC138 and 74HC164 chips respectively as keyboard signal input and signal output to nixie tube panel drive chip, while traditional 74HC138, 74HC164 chip and nixie tube panel and button are composed of connecting circuit In this way, there is a delay when scanning the buttons and display circuit, which occupies more pins of the microcontroller, and the scanning time is longer, especially for high-speed processors, resulting in low CPU utilization, insufficient pin resources, and extended modules The disadvantage of difficult lead. Therefore, if the utilization rate of the CPU is provided, the pin resources are released and the position of the module components is made...

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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