CN203119881U - Single-key multifunctional circuit - Google Patents
Single-key multifunctional circuit Download PDFInfo
- Publication number
- CN203119881U CN203119881U CN 201320020898 CN201320020898U CN203119881U CN 203119881 U CN203119881 U CN 203119881U CN 201320020898 CN201320020898 CN 201320020898 CN 201320020898 U CN201320020898 U CN 201320020898U CN 203119881 U CN203119881 U CN 203119881U
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Abstract
The utility model provides a single-key multifunctional circuit, comprising resistors, keys, a key scan module, and a function selection module. An end of the resistor is connected with a current power source and the other end is connected with an IO port. An end of the key is connected with the IO port and the other end is connected with ground. The key scan module is connected with the IO port which is connected with the resistor and the key. The function selection module is connected with the key scan module. The single-key multifunctional circuit saves space and manufacturing costs of a PCB.
Description
Technical field
The utility model relates to a kind of key circuit, relates in particular to a kind of individual palpation key multifunctional circuit.
Background technology
(for example, TV, set-top box, DVD, refrigerator etc.) function constantly increases, and corresponding number of keys also increases thereupon along with all kinds of household electrical appliance.It is so multi-functional generally all to adopt a mode by an IO of keyed jointing to realize in these circuit.But under the situation of master control IO resource anxiety, existing mode is not only the waste of IO and can not be expanded greater functionality and purposes.Below provide the implementation of two kinds of traditional employing AD, just an IO is AD output back connecting resistance and button, but it also needs button of a function, and two functions need add a resistance and a button in addition, by that analogy.
Fig. 1 is the structure chart of traditional keypress function circuit 100.As shown in Figure 1, keypress function circuit 100 comprises by the function " 1 " of resistance 101 and button 111 realizations, by the function " 2 " of resistance 102 and button 112 realizations and the function " 3 " that is realized by resistance 103 and button 113.Resistance 101, an end of 102 and 103 are connected to circuit power VCC, and the other end is connected to above the IO, makes the IO level remain high state.When pushing button 111 the time IO ground connection of function " 1 ".At this moment, the IO level changes low state into.In this way, when IO detected the level variation, software was carried out corresponding function " 1 ".The operation principle of the operation principle of function " 2 " and " 3 " and function " 1 " is similar.
Fig. 2 is the structure chart of traditional another keypress function circuit 200.As shown in Figure 2, the function " 1 " that is realized by resistance 201 and button 211, the function " 2 " that is realized by resistance 202 and button 212, function " 3 " and the resistance 204 realized by resistance 203 and button 213.One end of resistance 204 is connected to circuit power VCC, and the other end is connected to IO (AD imports main control end), makes the IO level remain high state.Button 211, an end of 212 and 213 are connected respectively to resistance 201,202 and 203, and the other end is connected to the IO port.Resistance 201,202 and 203 other end ground connection.When pushing button 211 the time, resistance 201 and 204 produces a magnitude of voltage.At this moment, this magnitude of voltage converts a numerical value to by AD after by the AD input port, and master control is subsequently carried out corresponding function after reading this numerical value.Because resistance 201,202 and 203 resistance value have nothing in common with each other, when pushing button respectively 212 and 213 the time, can produce different magnitudes of voltage and import main control end to AD, thereby obtain different numerical value and carry out different functions by the AD input port.In this way, when pushing button 211,212 or 213 the time, carry out corresponding function " 1 ", function " 2 " or " 3 " respectively.
The shortcoming of above-mentioned two kinds of circuit is that the many and used components and parts of the required IO that takies are many, thereby cost of manufacture is than higher.In addition, for the relatively more nervous main control chip of some IO, it can't expand more function, also is that a kind of IO waste and cost increase.
The utility model content
Embodiment of the present utility model provides a kind of individual palpation key multifunctional circuit, comprise resistance, button, key scan module and function selecting module, one end of described resistance is connected to current and power supply and the other end is connected to the IO mouth, and an end of described button is connected to the IO mouth and other end ground connection; Described key scan module be connected to resistance and button the IO mouth that is connected jointly; And described function selecting module is connected to the key scan module.
Above-described embodiment can be saved cost and realize individual palpation key multifunctional circuit simultaneously.For the less chip of master control GPIO, both saved resource, expanded other function again, reduce the damage of product rate, and improve the market competitiveness of product (for example, web camera product).
Description of drawings
Fig. 1 is the structure chart of traditional keypress function circuit.
Fig. 2 is the structure chart of traditional another keypress function circuit.
Fig. 3 is the structural representation according to the individual palpation key multifunctional circuit of a kind of embodiment of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is made further more detailed description.Obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work should belong to the scope that the utility model is protected.
Fig. 3 is the structural representation according to the individual palpation key multifunctional circuit 300 of a kind of embodiment of the present utility model.Individual palpation key multifunctional circuit 300 can be applicable in the electronic product of network shooting head system (IP Camera) for example.Individual palpation key multifunctional circuit 300 comprises resistance 301, button 302, key scan module 303 and function selecting module 304.One end of resistance 301 is connected to circuit power VCC, and the other end is connected to IO (AD imports main control end), makes the IO level remain high state.When pushing button 302 the time, the IO level changes low state into.At this moment, key scan module 303 detects button 302 and has pressed and pick up counting.When detecting time that single presses when reaching time period t 1 (for example, 2 seconds), function selecting module 304 is selection function " 1 " (for example, " the Wi-Fi protection arranges function (WPS) " function of IP Camera) accordingly.When detecting time that single presses when reaching time period t 2 (for example, 5 seconds), function selecting module 304 is selection function " 2 " (for example, " recovery dispatch from the factory parameter " function of IP Camera) accordingly.When detecting time that single presses when reaching time period t 3 (for example, 10 seconds), function selecting module 304 is selection function " 3 " accordingly.In this way, when button 302 singles are pressed the regular hour during section, carry out corresponding function " 1 ", function " 2 " or " 3 " respectively.
Advantageously, adopt simple discrete component structure shown in Figure 3, the space that takies pcb board is very little, thereby saves cost and realized individual palpation key multifunctional circuit simultaneously.For the less chip of master control GPIO, both saved resource, expanded other function again, reduce the damage of product rate, and improve the market competitiveness of product (for example, web camera product).
Above disclosed only is preferred embodiment among the utility model embodiment, can not limit interest field of the present utility model with this certainly, and therefore the equivalent variations of doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (1)
1. individual palpation key multifunctional circuit comprises:
Resistance, an end of described resistance is connected to current and power supply and the other end is connected to the IO mouth;
Button, an end of described button are connected to described IO mouth and other end ground connection;
The key scan module, be connected to described resistance and described button the described IO mouth that is connected jointly; And function selecting module, be connected to described key scan module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020898 CN203119881U (en) | 2013-01-14 | 2013-01-14 | Single-key multifunctional circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320020898 CN203119881U (en) | 2013-01-14 | 2013-01-14 | Single-key multifunctional circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203119881U true CN203119881U (en) | 2013-08-07 |
Family
ID=48900192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320020898 Expired - Fee Related CN203119881U (en) | 2013-01-14 | 2013-01-14 | Single-key multifunctional circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203119881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110121861A (en) * | 2016-11-04 | 2019-08-13 | Bsh家用电器有限公司 | The connection of household appliance and remote control apparatus |
-
2013
- 2013-01-14 CN CN 201320020898 patent/CN203119881U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110121861A (en) * | 2016-11-04 | 2019-08-13 | Bsh家用电器有限公司 | The connection of household appliance and remote control apparatus |
| US11343115B2 (en) | 2016-11-04 | 2022-05-24 | Bsh Hausgeraete Gmbh | Connecting a domestic appliance to a remote control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Reecam Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20180114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |