CN204695748U - A kind of microcontroller of configurable LCD driving circuit - Google Patents
A kind of microcontroller of configurable LCD driving circuit Download PDFInfo
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- CN204695748U CN204695748U CN201520193147.7U CN201520193147U CN204695748U CN 204695748 U CN204695748 U CN 204695748U CN 201520193147 U CN201520193147 U CN 201520193147U CN 204695748 U CN204695748 U CN 204695748U
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Abstract
The utility model is applicable to integrated circuit fields, provide a kind of microcontroller of configurable LCD driving circuit, this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively.Integrated circuit structure of the present utility model is simple, easy to use, with low cost.Simplify the cost that circuit reduces MCU chip, and bring the facility of definition delivery outlet flexibly to user.
Description
Technical field
The utility model belongs to integrated circuit fields, particularly relates to a kind of microcontroller of configurable LCD driving circuit.
Background technology
Specification and the design process at present with the microcontroller of liquid crystal drive function are such: first will determine to need the maximum number of points of liquid crystal display (LCD) module driven namely to determine the quantity of the section (Segment) that LCD drives and common port (Common) delivery outlet, and determine the Pin locations at these Segment and Common places, then design circuit makes chip can export corresponding LCD drive waveforms according to the sequential of regulation on these pins set, this microcontroller chip is once design and after dropping into volume production like this, the function that these LCD driver output pins are corresponding is also fixed thereupon, cannot adjust, user is so just made to have certain limitation when circuit design and PCB routing, larger difficulty is brought in actual applications to user.
Principle illustrates: traditional lcd driver comprises a controller, a voltage generator and several COM and SEG output pins.Controller is for generation of the signal waveform driven required for LCD, and voltage generator is for generation of the intermediate level (V2, V3) driving LCD, and the LCD drive waveforms of circuit evolving exports eventually through corresponding pin, and the waveform that LCD drives as shown in Figure 1.
Adopt MCU and the LCD display module connection diagram of current prior art, as shown in Figure 2, as we can see from the figure because the pin of MCU and LCD module is all fixing, therefore the connecting line between these two periods is necessary one_to_one corresponding also, so just make user have certain limitation when circuit design and PCB routing, user brings larger inconvenience in the application.
Utility model content
The purpose of this utility model is the microcontroller providing a kind of configurable LCD driving circuit, is intended to solve above-mentioned technical matters.
The utility model realizes like this, a kind of microcontroller of configurable LCD driving circuit, this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively.
Further technical scheme of the present utility model is: described microcontroller also comprises central processing unit and interrupts control module, the output terminal of described central processing unit connects described output register, the output terminal of described middle-end control module connects the input end of described central processing unit, and described power supply is electrically connected described central processing unit respectively and interrupts control module.
Further technical scheme of the present utility model is: described microcontroller also comprises time block, pulse width modulation module, D/A converter module, counting module and base modules, described time block connects described central processing unit both-way communication, the output terminal of described time block connects the input end of described interruption control module, described pulse width modulation module connects described central processing unit both-way communication, the output terminal of described pulse width modulation module connects the input end of described interruption control module, described D/A converter module connects described central processing unit both-way communication, the output terminal of described D/A converter module connects the input end of described interruption control module, described counting module connects described central processing unit both-way communication, the output terminal of described counting module connects the input end of described interruption control module, the output terminal of described base modules connects the input end of described central processing unit, described power supply is electrically connected described time block respectively, pulse width modulation module, D/A converter module, counting module and base modules.
Further technical scheme of the present utility model is: described central processing unit comprises CPU (central processing unit), data storage element and program storage unit, and described CPU (central processing unit) connects described data storage element respectively and program storage unit carries out both-way communication.
Further technical scheme of the present utility model is: described time block comprises first timer and second timer, and described first timer and described second timer walk abreast and arrange.
Further technical scheme of the present utility model is: described D/A converter module comprises reference power source unit, digital to analog converter and digital-to-analog conversion control module, the output terminal of described reference power source unit connects the input end of described digital to analog converter, and described digital to analog converter connects the two-way communication of described digital-to-analog conversion control module.
Further technical scheme of the present utility model is: described counting module comprises the first oscillator and counter, and the output terminal of described first oscillator connects the input end of described counter; Described first oscillator adopts 32k oscillator.
Further technical scheme of the present utility model is: described base modules comprises reference power supply unit, voltage detection unit, reset control module, the second oscillator and clock control cell, the output terminal of described reference power supply unit connects the input end of voltage detection unit and the input end of the second oscillator respectively, described voltage detection unit connects the two-way communication of described reset control module, and the output terminal of described second oscillator connects the input end of described clock control cell; What described second oscillator adopted is 16M oscillator.
Another object of the present utility model is the microcontroller providing a kind of configurable LCD driving circuit, this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively; Segment and the Common port of described LCD driving circuit can configure neatly according to application demand.
Further technical scheme of the present utility model is: described microcontroller also comprises central processing unit and interrupts control module, the output terminal of described central processing unit connects described output register, the output terminal of described middle-end control module connects the input end of described central processing unit, and described power supply is electrically connected described central processing unit respectively and interrupts control module, described microcontroller also comprises time block, pulse width modulation module, D/A converter module, counting module and base modules, described time block connects described central processing unit both-way communication, the output terminal of described time block connects the input end of described interruption control module, described pulse width modulation module connects described central processing unit both-way communication, the output terminal of described pulse width modulation module connects the input end of described interruption control module, described D/A converter module connects described central processing unit both-way communication, the output terminal of described D/A converter module connects the input end of described interruption control module, described counting module connects described central processing unit both-way communication, the output terminal of described counting module connects the input end of described interruption control module, the output terminal of described base modules connects the input end of described central processing unit, described power supply is electrically connected described time block respectively, pulse width modulation module, D/A converter module, counting module and base modules, described central processing unit comprises CPU (central processing unit), data storage element and program storage unit, and described CPU (central processing unit) connects described data storage element respectively and program storage unit carries out both-way communication.
The beneficial effects of the utility model are: integrated circuit structure of the present utility model is simple, easy to use, with low cost.Simplify the cost that circuit reduces MCU chip, and bring the facility of definition delivery outlet flexibly to user.
Accompanying drawing explanation
Fig. 1 is traditional LC D drive waveforms figure (1/4 duty, 1/3 bias);
Fig. 2 is traditional MCU and LCD display module connection diagram;
Fig. 3 is the output circuit schematic diagram of the exportable four kinds of level for LCD driving that the utility model embodiment provides;
Fig. 4 is that the LCD drive waveforms that the utility model embodiment provides produces software flow pattern.
Embodiment
Fig. 1 shows the microcontroller of the configurable LCD driving circuit that the utility model provides, this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively.Integrated circuit structure of the present utility model is simple, easy to use, with low cost.Simplify the cost that circuit reduces MCU chip, and bring the facility of definition delivery outlet flexibly to user.
Described microcontroller also comprises central processing unit and interrupts control module, the output terminal of described central processing unit connects described output register, the output terminal of described middle-end control module connects the input end of described central processing unit, and described power supply is electrically connected described central processing unit respectively and interrupts control module.
Described microcontroller also comprises time block, pulse width modulation module, D/A converter module, counting module and base modules, described time block connects described central processing unit both-way communication, the output terminal of described time block connects the input end of described interruption control module, described pulse width modulation module connects described central processing unit both-way communication, the output terminal of described pulse width modulation module connects the input end of described interruption control module, described D/A converter module connects described central processing unit both-way communication, the output terminal of described D/A converter module connects the input end of described interruption control module, described counting module connects described central processing unit both-way communication, the output terminal of described counting module connects the input end of described interruption control module, the output terminal of described base modules connects the input end of described central processing unit, described power supply is electrically connected described time block respectively, pulse width modulation module, D/A converter module, counting module and base modules.
Described central processing unit comprises CPU (central processing unit), data storage element and program storage unit, and described CPU (central processing unit) connects described data storage element respectively and program storage unit carries out both-way communication.
Described time block comprises first timer and second timer, and described first timer and described second timer walk abreast and arrange.
Described D/A converter module comprises reference power source unit, digital to analog converter and digital-to-analog conversion control module, the output terminal of described reference power source unit connects the input end of described digital to analog converter, and described digital to analog converter connects the two-way communication of described digital-to-analog conversion control module.
Described counting module comprises the first oscillator and counter, and the output terminal of described first oscillator connects the input end of described counter; Described first oscillator adopts 32k oscillator.
Described base modules comprises reference power supply unit, voltage detection unit, reset control module, the second oscillator and clock control cell, the output terminal of described reference power supply unit connects the input end of voltage detection unit and the input end of the second oscillator respectively, described voltage detection unit connects the two-way communication of described reset control module, and the output terminal of described second oscillator connects the input end of described clock control cell; What described second oscillator adopted is 16M oscillator.
Another object of the present utility model provides a kind of microcontroller of configurable LCD driving circuit, this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively; Segment and the Common port of described LCD driving circuit can configure neatly according to application demand.
Described microcontroller also comprises central processing unit and interrupts control module, the output terminal of described central processing unit connects described output register, the output terminal of described middle-end control module connects the input end of described central processing unit, and described power supply is electrically connected described central processing unit respectively and interrupts control module, described microcontroller also comprises time block, pulse width modulation module, D/A converter module, counting module and base modules, described time block connects described central processing unit both-way communication, the output terminal of described time block connects the input end of described interruption control module, described pulse width modulation module connects described central processing unit both-way communication, the output terminal of described pulse width modulation module connects the input end of described interruption control module, described D/A converter module connects described central processing unit both-way communication, the output terminal of described D/A converter module connects the input end of described interruption control module, described counting module connects described central processing unit both-way communication, the output terminal of described counting module connects the input end of described interruption control module, the output terminal of described base modules connects the input end of described central processing unit, described power supply is electrically connected described time block respectively, pulse width modulation module, D/A converter module, counting module and base modules, described central processing unit comprises CPU (central processing unit), data storage element and program storage unit, and described CPU (central processing unit) connects described data storage element respectively and program storage unit carries out both-way communication.
There is the microcontroller of novel LCD driving circuit, the quantity of Segment and Common that user's sets itself LCD can be allowed to drive and Pin locations thereof, all bring great convenience in the selection etc. of circuit board wiring and Liquid Crystal Module to user.
The circuit structure that novel LCD drives, delivery outlet is made to have the ability of output four kinds of level, each output port adopt one four select one MUX (MUX), export control register to have two control lines to receive MUX to be used for controlling MUX and from four incoming levels, to select one output to output pin, and the value exporting control register can pass through software set, software flow pattern as shown in Figure 4, so at any time, delivery outlet all can select a level to export in four kinds of level, this delivery outlet can be allowed only to export VDD and GND two kinds of level when applying as common delivery outlet like this, then can allow this delivery outlet in four kinds of level, select an output when needs drive during LCD, pass through software control like this, an input and output pin can be defined arbitrarily according to the demand of peripheral circuit as LCD with regard to making user and drive pin, and can the characteristic of these pins of self-defining be segment or common, the LCD drive waveforms that these pins final export is identical with traditional LCD drive waveforms, but reach display effect with traditional approach is identical again can the definition of flexible configuration pin and the object of position.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. the microcontroller of a configurable LCD driving circuit, it is characterized in that: this microcontroller comprises MUX MUX, output register and power supply, the control end of described output register connects the control end of described MUX, described MUX adopts the MUX MUX of multiselect one, described output register controls described MUX and from multiple incoming level, selects one output to output pin, and described power supply is electrically connected described MUX MUX and output register respectively.
2. microcontroller according to claim 1, it is characterized in that, described microcontroller also comprises central processing unit and interrupts control module, the output terminal of described central processing unit connects described output register, the output terminal of described interruption control module connects the input end of described central processing unit, and described power supply is electrically connected described central processing unit respectively and interrupts control module.
3. microcontroller according to claim 2, it is characterized in that, described microcontroller also comprises time block, pulse width modulation module, D/A converter module, counting module and base modules, described time block connects described central processing unit both-way communication, the output terminal of described time block connects the input end of described interruption control module, described pulse width modulation module connects described central processing unit both-way communication, the output terminal of described pulse width modulation module connects the input end of described interruption control module, described D/A converter module connects described central processing unit both-way communication, the output terminal of described D/A converter module connects the input end of described interruption control module, described counting module connects described central processing unit both-way communication, the output terminal of described counting module connects the input end of described interruption control module, the output terminal of described base modules connects the input end of described central processing unit, described power supply is electrically connected described time block respectively, pulse width modulation module, D/A converter module, counting module and base modules.
4. microcontroller according to claim 3, it is characterized in that, described central processing unit comprises CPU (central processing unit), data storage element and program storage unit, and described CPU (central processing unit) connects described data storage element respectively and program storage unit carries out both-way communication.
5. microcontroller according to claim 4, is characterized in that, described time block comprises first timer and second timer, and described first timer and described second timer walk abreast and arrange.
6. microcontroller according to claim 5, it is characterized in that, described D/A converter module comprises reference power source unit, digital to analog converter and digital-to-analog conversion control module, the output terminal of described reference power source unit connects the input end of described digital to analog converter, and described digital to analog converter connects the two-way communication of described digital-to-analog conversion control module.
7. microcontroller according to claim 6, is characterized in that, described counting module comprises the first oscillator and counter, and the output terminal of described first oscillator connects the input end of described counter; Described first oscillator adopts 32k oscillator.
8. microcontroller according to claim 7, it is characterized in that, described base modules comprises reference power supply unit, voltage detection unit, reset control module, the second oscillator and clock control cell, the output terminal of described reference power supply unit connects the input end of voltage detection unit and the input end of the second oscillator respectively, described voltage detection unit connects the two-way communication of described reset control module, and the output terminal of described second oscillator connects the input end of described clock control cell; What described second oscillator adopted is 16M oscillator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520193147.7U CN204695748U (en) | 2015-04-01 | 2015-04-01 | A kind of microcontroller of configurable LCD driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520193147.7U CN204695748U (en) | 2015-04-01 | 2015-04-01 | A kind of microcontroller of configurable LCD driving circuit |
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| CN204695748U true CN204695748U (en) | 2015-10-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201951A (en) * | 2016-07-19 | 2016-12-07 | 青岛海信电器股份有限公司 | Terminal unit based on USB Type C interface, external equipment and electric power system |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106201951A (en) * | 2016-07-19 | 2016-12-07 | 青岛海信电器股份有限公司 | Terminal unit based on USB Type C interface, external equipment and electric power system |
| CN106201951B (en) * | 2016-07-19 | 2019-03-19 | 青岛海信电器股份有限公司 | Terminal device, external equipment and power supply system based on USB Type-C interface |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20170401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |