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

A control circuit and control method technology, applied to instruments, static indicators, etc., can solve the problems of module lead extension difficulties, microcontroller pins, low CPU utilization, etc., achieve reasonable allocation of pin resources, reduce leads The effect of the number of feet and the tight position

Active Publication Date: 2017-04-12
WUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments, but this does not constitute any limitation to the present invention.

[0030] see figure 1 As shown, a digital tube panel and button control circuit of the present invention includes 74HC138 chip 1, 74HC164 chip 2, current limiting resistor 3, five-digit common cathode digital tube 4, function indicating LED5, function touch button 6 and data connection Port 7, wherein, the data connection port 7 is connected to the common end of the 74HC138 chip 1, 74HC164 chip 2 and the function touch button 6, the 74HC164 chip 2 is connected to the current limiting resistor 3, and the 74HC138 chip 1 is connected to the The five common cathode digital tubes 4, the common terminal of the function indication LED5, and the function touch button 6 are connected, and the current limiting resistor 3 is connected with the segment code of the five common cathod...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/14
Inventor 玉振明黄永庆周信健
Owner WUZHOU UNIV
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