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A vga expansion interface circuit suitable for single chip computer system

A technology of VGA interface and single-chip microcomputer, applied in the field of high-definition display, can solve the problem of lack of VGA expansion interface circuit of single-chip microcomputer, and achieve the effect of reducing the amount of software writing, sufficient market supply, and reducing difficulty

Active Publication Date: 2015-09-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Contradictory to it is the VGA expansion interface circuit design of the relatively scarce single-chip microcomputer

Method used

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  • A vga expansion interface circuit suitable for single chip computer system
  • A vga expansion interface circuit suitable for single chip computer system
  • A vga expansion interface circuit suitable for single chip computer system

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, it is a kind of VGA expansion interface circuit suitable for single-chip microcomputer system, including LCD control circuit, video decoding circuit, font circuit and VGA interface; the image digital signal input port of said LCD control circuit is connected with the image of single-chip microcomputer system through 8080 bus The digital signal output ports are connected to buffer the image information output by the single-chip microcomputer system; meanwhile, the field and line synchronization signal output ports of the LCD control circuit are connected to the digital ports of the VGA interface; the digital signal input ports of the video decoding circuit are connected to the The digital RGB signal output port of the LCD control circuit is connected, the control signal input port is connected with the image control signal output port o...

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Abstract

The invention discloses a VGA (Video Graphics Array) expansion interface circuit suitable for a singlechip system, which is an external expansion interface circuit on the basis of an 8080 bus and an IIC (Inter-Integrated Circuit) bus of the singlechip system. The VGA expansion interface circuit mainly comprises an LCD (Liquid Crystal Display) control circuit, a video decoding circuit and a VGA interface and provides capacity of outputting a VGA signal for the singlechip system. The VGA expansion interface circuit suitable for the singlechip system, which is disclosed by the invention, has the advantages of simplicity, practicality, low cost, stability, reliability and the like and can be widely applied to the fields of instruments and industrial control and the field of image interaction of the singlechip system.

Description

technical field [0001] The invention relates to a VGA (Video Graphics Array, video graphics array) extended interface circuit suitable for a single-chip microcomputer system, in particular to the design of a VGA output signal circuit applied to a single-chip microcomputer system in the field of instrumentation and industrial control, and belongs to the field of high-definition display technology. Background technique [0002] Single-chip microcomputer has the characteristics of high cost performance, flexible function, easy man-machine dialogue, good data processing ability, etc., but because there is no built-in LCD controller, most single-chip microcomputer chips have speed and resource problems when doing VGA display. As an effective and intuitive interactive medium, images have gradually received more attention in recent years in the traditional application fields of single-chip microcomputers such as instrumentation and industrial control. As a typical interface of a di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 宋爱国邵梦超廖韩林
Owner SOUTHEAST UNIV