CN101977048A - Induction touch switch circuit having crash resistant function - Google Patents
Induction touch switch circuit having crash resistant function Download PDFInfo
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- CN101977048A CN101977048A CN 201010530763 CN201010530763A CN101977048A CN 101977048 A CN101977048 A CN 101977048A CN 201010530763 CN201010530763 CN 201010530763 CN 201010530763 A CN201010530763 A CN 201010530763A CN 101977048 A CN101977048 A CN 101977048A
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- chip
- touch
- touch sensible
- sensible chip
- triode
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Abstract
The invention discloses an induction touch switch circuit having crash resistant function. The induction touch switch circuit comprises a control chip central processing unit (CPU) and a touch induction chip IC1, wherein the touch induction chip IC1 is at least connected with a touch key S1; the touch induction chip IC1 is connected with the input/output end CPU2 of the control chip CPU through a pull-up resistor R4; the touch induction chip IC1 is at least connected with a key sensitivity adjustment button S2; the voltage drain drain (VDD) of the power end of the touch induction chip IC1 is connected with collector electrode of a triode Q1; the emitting electrode of the triode Q1 is connected with a power supply; and the collector electrode is connected to the input/output end CPU1 of the control chip CPU through a resistor R1. The induction touch switch circuit has a simple circuit structure and is convenient to use.
Description
Technical field
The present invention relates to a kind of application circuit, be specifically related to a kind of touch sensitive switching circuit with anti-deadlock function.
Background technology
Existingly prevent to cause in the shutdown process in the circuit of system in case of system halt, but most complex structure, the function complexity, and only need under the application scenario of function singleness at some, adopt the circuit of the anti-deadlock function of complicated circuit construction to finish single anti-deadlock function often, cost can increase so on the one hand, in addition on the one hand, after circuit structure was in a single day complicated, its destabilizing factor was behind so just reducing product percent of pass virtually also increasing.
Summary of the invention
For overcoming deficiency of the prior art, the object of the present invention is to provide a kind of touch sensitive switching circuit with anti-deadlock function simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of touch sensitive switching circuit with anti-deadlock function, comprise a control chip CPU, one touch sensible chip IC 1, at least be connected with a touch key-press S1 on the described touch sensible chip IC 1, described touch sensible chip IC 1 connects the input/output terminal CPU2 of described control chip CPU by pull-up resistor R4, also be connected with a button sensitivity on the described touch sensible chip IC 1 at least and regulate button S2, the power end VDD of described touch sensible chip IC 1 connects the collector electrode of triode Q1, the emitter of described triode Q1 connects power supply, and collector electrode is connected to the input/output terminal CPU1 of described control chip CPU by resistance R 1.
Further, the external timing signal OSC1 of described touch sensible chip IC 1 end is by capacitor C 1 ground connection, and the negative voltage VSS of described touch sensible chip IC 1 holds ground connection, the option test output OPS1 end ground connection of described touch sensible chip IC 1.
Further, described triode Q1 collector electrode is also by a resistance R 2 ground connection.
The course of work of the touch sensitive switching circuit with anti-deadlock function of the present invention is as follows:
When removing to contact touch key-press S1 with hand, form an electric capacity between people's finger and the button, detect this signal, as detected signal through the chip processing by touch sensible chip IC 1, send into control chip CPU by serial mode, thereby realize touch sensing function.Resistance R 4 realizes the function of pull-up current, button S2 scalable touch key-press S1 sensitivity level is regulated in button sensitivity, control chip CPU control triode Q1 comes to 1 power supply of touch sensible chip IC, can play and prevent that touch sensible chip IC 1 is when rapid switching on and shutting down, because the complete machine capacitor discharge time is long, the situation that causes touch sensible chip IC 1 to crash.
The present invention has the following advantages:
Touch sensitive switching circuit with anti-deadlock function of the present invention is simple in structure, easy to use.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the circuit theory diagrams with touch sensitive switching circuit of anti-deadlock function of the present invention.
Embodiment
Below in conjunction with drawings and Examples technology implementation process of the present invention is described further.
Referring to shown in Figure 1, a kind of touch sensitive switching circuit with anti-deadlock function, comprise a control chip CPU, one touch sensible chip IC 1, at least be connected with a touch key-press S1 on the described touch sensible chip IC 1, described touch sensible chip IC 1 connects the input/output terminal CPU2 of described control chip CPU by pull-up resistor R4, also be connected with a button sensitivity on the described touch sensible chip IC 1 at least and regulate button S2, the power end VDD of described touch sensible chip IC 1 connects the collector electrode of triode Q1, the emitter of described triode Q1 connects power supply, and collector electrode is connected to the input/output terminal CPU1 of described control chip CPU by resistance R 1.
Further, the external timing signal OSC1 of described touch sensible chip IC 1 end is by capacitor C 1 ground connection, and the negative voltage VSS of described touch sensible chip IC 1 holds ground connection, the option test output OPS1 end ground connection of described touch sensible chip IC 1.
Further, described triode Q1 collector electrode is also by a resistance R 2 ground connection.
The foregoing description just is to allow the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this for technical conceive of the present invention and characteristics being described, its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
Claims (3)
1. touch sensitive switching circuit with anti-deadlock function, comprise a control chip CPU, one touch sensible chip IC 1, at least be connected with a touch key-press S1 on the described touch sensible chip IC 1, described touch sensible chip IC 1 connects the input/output terminal CPU2 of described control chip CPU by pull-up resistor R4, also be connected with a button sensitivity on the described touch sensible chip IC 1 at least and regulate button S2, it is characterized in that: the power end VDD of described touch sensible chip IC 1 connects the collector electrode of triode Q1, the emitter of described triode Q1 connects power supply, and collector electrode is connected to the input/output terminal CPU1 of described control chip CPU by resistance R 1.
2. the touch sensitive switching circuit with anti-deadlock function according to claim 1, it is characterized in that: the external timing signal OSC1 end of described touch sensible chip IC 1 is by capacitor C 1 ground connection, the negative voltage VSS end ground connection of described touch sensible chip IC 1, the option test output OPS1 end ground connection of described touch sensible chip IC 1.
3. the touch sensitive switching circuit with anti-deadlock function according to claim 1 is characterized in that: described triode Q1 collector electrode is also by a resistance R 2 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010530763 CN101977048A (en) | 2010-11-03 | 2010-11-03 | Induction touch switch circuit having crash resistant function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010530763 CN101977048A (en) | 2010-11-03 | 2010-11-03 | Induction touch switch circuit having crash resistant function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101977048A true CN101977048A (en) | 2011-02-16 |
Family
ID=43576901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010530763 Pending CN101977048A (en) | 2010-11-03 | 2010-11-03 | Induction touch switch circuit having crash resistant function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101977048A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389667A (en) * | 2013-07-23 | 2013-11-13 | 广西柳工机械股份有限公司 | Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2490759Y (en) * | 2001-06-21 | 2002-05-08 | 洪当岳 | Touch switch capable of avoiding element damaged |
| CN201238405Y (en) * | 2008-05-01 | 2009-05-13 | 美的集团有限公司 | Touch control induction circuit of induction cooker |
| CN101470507A (en) * | 2007-12-28 | 2009-07-01 | 鸿富锦精密工业（深圳）有限公司 | Power supply control circuit |
-
2010
- 2010-11-03 CN CN 201010530763 patent/CN101977048A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2490759Y (en) * | 2001-06-21 | 2002-05-08 | 洪当岳 | Touch switch capable of avoiding element damaged |
| CN101470507A (en) * | 2007-12-28 | 2009-07-01 | 鸿富锦精密工业（深圳）有限公司 | Power supply control circuit |
| CN201238405Y (en) * | 2008-05-01 | 2009-05-13 | 美的集团有限公司 | Touch control induction circuit of induction cooker |
Non-Patent Citations (1)
| Title |
|---|
| 《http://wenku.baidu.com/view/b69a9702de80d4d8d15a4fcf.html》 20100627 速杰通 SJT5208SN 文档第4-6页，图6.2串行输出模式的应用 1-3 , 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389667A (en) * | 2013-07-23 | 2013-11-13 | 广西柳工机械股份有限公司 | Protection method for preventing invalidation of CPU (central processing unit) of construction machinery controller |
| CN103389667B (en) * | 2013-07-23 | 2016-12-28 | 广西柳工机械股份有限公司 | A kind of guard method of the anti-inefficacy of construction machinery controller CPU |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110216 |