CN208508901U - Reset automatic boot circuit and electronic equipment - Google Patents
Reset automatic boot circuit and electronic equipment Download PDFInfo
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- CN208508901U CN208508901U CN201821234007.XU CN201821234007U CN208508901U CN 208508901 U CN208508901 U CN 208508901U CN 201821234007 U CN201821234007 U CN 201821234007U CN 208508901 U CN208508901 U CN 208508901U
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Abstract
The utility model discloses a kind of reset automatic boot circuit and electronic equipments.Resetting automatic boot circuit includes reset circuit, booting detection circuit and booting power supply circuit；Reset circuit is connect with booting detection circuit, and booting detection circuit is connect with booting power supply circuit, and reset circuit and booting detection circuit are connect with microcontroller respectively；Reset circuit resets system when reset key is pressed, and provides driving voltage when reset key is unclamped for booting detection circuit；Booting detection circuit is switched on according to the driving voltage drive system；Power supply circuit be switched in system boot, is system power supply.Using several simple components and line, the function of Auto Power On after external reset is realized, improve user experience.
Description
Technical Field
The utility model relates to a hardware equipment field especially relates to an automatic start circuit and electronic equipment reset.
Background
Along with the development of science and technology, electronic products are more popular and are applied to various fields. However, in the use process of electronic products, systems of many electronic products are unstable, and a dead halt phenomenon is easy to occur, and when a user encounters such a problem, the user usually needs to manually reset, and after the reset, the user also needs to manually restart the system to start the power supply of the battery to the system, so that the operation is complicated.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides an automatic start circuit resets, aims at solving among the prior art technical problem that electronic product can't the automatic start after externally resetting.
In order to achieve the above object, the present invention provides a reset automatic power-on circuit, which comprises a reset circuit, a power-on detection circuit and a power-on power supply circuit; the reset circuit is connected with the starting detection circuit, the starting detection circuit is connected with the starting power supply circuit, and the reset circuit and the starting detection circuit are respectively connected with the microcontroller.
Specifically, the reset circuit is configured to reset a system when a reset key in the reset circuit is pressed, and provide a driving voltage for the power-on detection circuit when the reset key is released; the starting detection circuit is used for driving the system to start according to the driving voltage; the starting power supply circuit is used for supplying power to the system when the system is started.
Preferably, the reset circuit comprises a reset key, a first diode and a first capacitor; the first end of the reset key is connected with a first power supply, the second end of the reset key is connected with the anode of the first diode, and the cathode of the first diode is connected with the microcontroller; the first end of the first capacitor is connected with the second end of the reset key, and the second end of the first capacitor is grounded.
Preferably, the reset circuit further comprises a first resistor, a second resistor and a second diode; the first end of the first resistor is connected with the first power supply, and the second end of the first resistor is connected with the first end of the reset key; the first end of the second resistor is connected with the second end of the reset key, the second end of the second resistor is connected with the anode of the second diode, and the cathode of the second diode is connected with the first end of the first capacitor.
Preferably, the power-on detection circuit includes a switch unit and a power-on control unit, the switch unit is connected to the reset circuit and the power-on control unit, and the power-on control unit is connected to the microcontroller and the power-on supply circuit.
Preferably, the switch unit includes a first triode, a third resistor and a fourth resistor; the first end of the third resistor is connected with the reset circuit, the second end of the third resistor is connected with the base electrode of the first triode, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is connected with the power-on control unit; and the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is grounded.
Preferably, the power-on control unit comprises a fifth resistor, a third diode, a fourth diode and a switch key; the first end of the fifth resistor is connected with a second power supply, and the second end of the fifth resistor is connected with the microcontroller; the anode of the third diode is connected with the second end of the fifth resistor, and the cathode of the third diode is connected with the switch unit; the cathode of the fourth diode is grounded through the switch key, and the anode of the fourth diode is connected with the power supply circuit.
Preferably, the power-on power supply circuit comprises a sixth resistor, a seventh resistor and an MOS transistor; the source electrode of the MOS tube is connected with a third power supply, the drain electrode of the MOS tube is connected with a fourth power supply, and the grid electrode of the MOS tube is connected with the first end of the sixth resistor; a second end of the sixth resistor is connected with the power-on detection circuit; the first end of the seventh resistor is connected with the source electrode of the MOS tube, and the second end of the seventh resistor is connected with the first end of the sixth resistor.
Preferably, the power-on power supply circuit further includes a second capacitor, a first end of the second capacitor is connected to the source of the MOS transistor, and a second end of the second capacitor is connected to the gate of the MOS transistor.
Preferably, the power-on supply circuit further includes a second triode, an eighth resistor and a ninth resistor; a collector of the second triode is connected with a second end of the sixth resistor, an emitter of the second triode is grounded, a base of the second triode is connected with a first end of the eighth resistor, and a second end of the eighth resistor is connected with the microcontroller; and the first end of the ninth resistor is connected with the base electrode of the second triode, and the second end of the ninth resistor is grounded.
The utility model also provides an electronic equipment, electronic equipment includes as above automatic start circuit resets.
The utility model resets the system when the reset key is pressed down through the reset circuit, and provides a driving voltage for the starting detection circuit when the reset key is released; the starting detection circuit drives the system to start according to the driving voltage; the power supply circuit supplies power to the system when the system is started. The automatic starting function after external reset is realized by adopting a plurality of simple components and connecting wires, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of a reset auto-start circuit according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the reset auto-start circuit of the present invention;
the reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Reset circuit | Q1～Q2 | First to second triodes |
| 200 | Startup detection circuit | D1～D4 | First to fourth diodes |
| 300 | Power supply circuit for starting up | VDD | A first power supply |
| R1～R9 | First to ninth resistors | VDD_3V3 | Second power supply |
| C1～C2 | First to second capacitors | VBAT_IN | Third power supply |
| VT1 | MOS tube | VBAT | Fourth power supply |
| SW1 | Reset key | SW2 | Start-up key |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an automatic start circuit resets, referring to fig. 1, in an embodiment, the circuit includes a reset circuit 100, a start detection circuit 200, a start power supply circuit 300; the reset circuit 100 is connected with the power-on detection circuit 200, the power-on detection circuit 200 is connected with the power-on power supply circuit 300, and the reset circuit 100 and the power-on detection circuit 200 are respectively connected with a microcontroller.
In this embodiment, the reset circuit 100 is configured to reset the system when the reset key SW1 in the reset circuit 100 is pressed, and provide a driving voltage for the power-on detection circuit 200 when the reset key SW1 is released; the power-on detection circuit 200 is configured to drive the system to power on according to the driving voltage; the power-on supply circuit 300 is used for supplying power to the system when the system is powered on.
It should be noted that the reset circuit 100 is connected to a reset pin of the microcontroller, when the reset key SW1 is pressed, the reset circuit 100 outputs a high level to the reset pin of the microcontroller to reset the microcontroller, and when the reset key SW1 is pressed all the time, the microcontroller is continuously reset, and at this time, the system is not turned on.
The power-on detection circuit 200 is connected with a detection pin of the microcontroller, the microcontroller gives a corresponding power-on and power-off instruction according to the output voltage of the power-on detection circuit 200, and when the microcontroller detects that the power-on detection circuit 200 outputs a low level, the microcontroller gives a power-on instruction.
Referring to fig. 2, further, the reset circuit 100 includes a reset key SW1, a first diode D1 and a first capacitor C1; a first terminal of the reset key SW1 is connected to a first power source VDD, a second terminal of the reset key SW1 is connected to an anode of the first diode D1, and a cathode of the first diode D1 is connected to the microcontroller; a first terminal of the first capacitor C1 is connected to a second terminal of the reset key SW1, and a second terminal of the first capacitor C1 is grounded.
Further, the reset circuit 100 further includes a first resistor R1, a second resistor R2, and a second diode D2; a first terminal of the first resistor R1 is connected to the first power source VDD, and a second terminal of the first resistor R1 is connected to a first terminal of the reset key SW 1; a first end of the second resistor R2 is connected to a second end of the reset key SW1, a second end of the second resistor R2 is connected to an anode of the second diode D2, and a cathode of the second diode D2 is connected to a first end of the first capacitor C1.
It can be understood that when the reset key SW1 is pressed, the reset circuit 100 outputs a high level through the first diode D1 to reset the microcontroller, and at the same time, the reset circuit 100 charges the first capacitor C1 through the second resistor R2 and the first diode D1. When the reset key SW1 is released, the first capacitor C1 discharges to provide a driving voltage for the power-on detection circuit 200.
In this embodiment, the power-on detection circuit 200 includes a switch unit 210 and a power-on control unit 220, the switch unit 210 is connected to the reset circuit 100 and the power-on control unit 220, and the power-on control unit 220 is connected to the microcontroller and the power-on supply circuit 300.
It should be understood that when the switch unit 210 is turned on, the power-on control unit 220 outputs a low level, and when the microcontroller detects the low level, a power-on command is issued to enable the power-on control unit 220 to control the system to be powered on.
Further, the switching unit 210 includes a first transistor Q1, a third resistor R3, and a fourth resistor R4; a first end of the third resistor R3 is connected to the reset circuit 100, a second end of the third resistor R3 is connected to the base of the first transistor Q1, an emitter of the first transistor Q1 is grounded, and a collector of the first transistor Q1 is connected to the power-on control unit 220; the first end of the fourth resistor R4 is connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is grounded.
It can be understood that when the reset switch SW1 is released, the first capacitor C1 discharges through the third resistor R3 and the fourth resistor R4, and simultaneously biases the first transistor Q1 to be conductive.
Further, the power-on control unit 220 includes a fifth resistor R5, a third diode D3, a fourth diode D4, and a power-on/off key SW 2; a first end of the fifth resistor R5 is connected with a second power supply VDD33, and a second end of the fifth resistor R5 is connected with the microcontroller; an anode of the third diode D3 is connected to the second terminal of the fifth resistor R5, and a cathode of the third diode D3 is connected to the switching unit 210; the cathode of the fourth diode D4 is grounded via the switch key SW2, and the anode of the fourth diode D4 is connected to the power-on supply circuit 300.
It is understood that the third diode D3 and the fourth diode D4 may be replaced by a double diode, which is not limited in this embodiment.
It should be noted that, when the switch key SW2 is pressed, the third diode D3 and the fourth diode D4 are grounded via the switch key SW2, the cathode voltage of the third diode D3 is pulled low, the third diode D3 is turned on, the voltage output to the microprocessor is also pulled low, and when the microprocessor detects a low level, a power-on command is given.
In a specific implementation, when the first transistor Q1 is turned on, the third diode D3 is grounded via the first transistor Q1, which causes the voltage across the third diode D3 to decrease, the voltage output to the microprocessor is pulled low, and when the microprocessor detects a low level, a power-on command is given. Therefore, if the first transistor Q1 is turned on, the system can be automatically turned on even if the user does not press the switch SW2 from the outside.
In this embodiment, the power-on circuit 300 includes a sixth resistor R6, a seventh resistor R7, and a MOS transistor VT 1; the source of the MOS transistor VT1 is connected to a third power source VBAT _ IN, the drain of the MOS transistor VT1 is connected to a fourth power source VBAT, and the gate of the MOS transistor VT1 is connected to the first end of the sixth resistor R6; a second end of the sixth resistor R6 is connected to the power-on detection circuit 200; a first end of the seventh resistor R7 is connected to the source of the MOS transistor VT1, and a second end of the seventh resistor R7 is connected to a first end of the sixth resistor R6.
IN a specific implementation, during a time when the first capacitor C1 discharges and turns on the first transistor Q1, the voltage of the fourth diode D4 is pulled low while the third diode D3 and the fourth diode D4 are grounded through the first transistor Q1, at this time, the third power VBAT _ IN provides a bias for the MOS transistor VT1 through the voltage division of the sixth resistor R6 and the seventh resistor R7, so that the MOS transistor VT1 is turned on, and the fourth power VBAT supplies power to the system.
Further, the power-on supply circuit 300 further includes a second capacitor C2, a first terminal of the second capacitor C2 is connected to the source of the MOS transistor VT1, and a second terminal of the second capacitor C2 is connected to the gate of the MOS transistor VT 1.
In order to better control the switching speed of the MOS transistor VT1, the power-on supply circuit 300 may add a second capacitor C2 with a capacitance value of 0.1 uF.
Further, the power-on supply circuit 300 further includes a second transistor Q2, an eighth resistor R8, and a ninth resistor R9; a collector of the second transistor Q2 is connected to a second end of the sixth resistor R6, an emitter of the second transistor Q2 is grounded, a base of the second transistor Q2 is connected to a first end of the eighth resistor R8, and a second end of the eighth resistor R8 is connected to the microcontroller; the first end of the ninth resistor R9 is connected to the base of the second transistor Q2, and the second end of the ninth resistor R9 is grounded.
It can be appreciated that, IN order to avoid the situation that the system is powered off due to the fact that the first transistor Q1 is turned off after the first capacitor C1 is discharged, the voltage of the fourth diode D4 is set high, and the MOS transistor VT1 is turned off, the power-on supply circuit 300 may further include a transistor control unit including the second transistor Q2, the eighth resistor R8, and a ninth resistor R9, the transistor control unit is connected to the microcontroller, and the microcontroller sets the voltage of the transistor high, so as to turn on the second transistor Q2, and the third power supply VBTA _ IN provides a bias voltage for the MOS transistor VT1 through the seventh resistor R7, the sixth resistor R6, and the second transistor Q2, so as to achieve the purpose of supplying power to the system.
The utility model resets the system when the reset key is pressed down through the reset circuit, and provides a driving voltage for the starting detection circuit when the reset key is released; the starting detection circuit drives the system to start according to the driving voltage; the power supply circuit supplies power to the system when the system is started. The automatic starting function after external reset is realized by adopting a plurality of simple components and connecting wires, and the user experience is improved.
The utility model also provides an electronic device, the electronic device includes the reset automatic start-up circuit as described above, the circuit structure of the reset automatic start-up circuit of the electronic device can refer to the above-mentioned embodiment, and is not described herein again; it can be understood that, since the electronic device of the embodiment adopts the technical solution of the reset auto-on circuit, the device has all the above beneficial effects; it should be understood that the electronic device may be a smart phone, a tablet computer, a smart television, and the like, which is not limited in this embodiment.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A reset automatic start-up circuit is characterized by comprising a reset circuit, a start-up detection circuit and a start-up power supply circuit; the reset circuit is connected with the starting-up detection circuit, the starting-up detection circuit is connected with the starting-up power supply circuit, and the reset circuit and the starting-up detection circuit are respectively connected with the microcontroller; wherein,
the reset circuit is used for resetting a system when a reset key in the reset circuit is pressed down and providing driving voltage for the starting detection circuit when the reset key is released;
the starting detection circuit is used for driving the system to start according to the driving voltage;
the starting power supply circuit is used for supplying power to the system when the system is started.
2. The reset auto-on circuit of claim 1, wherein the reset circuit comprises a reset key, a first diode, and a first capacitor; the first end of the reset key is connected with a first power supply, the second end of the reset key is connected with the anode of the first diode, and the cathode of the first diode is connected with the microcontroller; the first end of the first capacitor is connected with the second end of the reset key, and the second end of the first capacitor is grounded.
3. The reset auto-on circuit of claim 2, wherein the reset circuit further comprises a first resistor, a second resistor, and a second diode; the first end of the first resistor is connected with the first power supply, and the second end of the first resistor is connected with the first end of the reset key; the first end of the second resistor is connected with the second end of the reset key, the second end of the second resistor is connected with the anode of the second diode, and the cathode of the second diode is connected with the first end of the first capacitor.
4. The reset auto-on circuit of claim 1, wherein the power-on detection circuit comprises a switch unit and a power-on control unit, the switch unit is connected to the reset circuit and the power-on control unit, respectively, and the power-on control unit is connected to the microcontroller and the power-on supply circuit, respectively.
5. The reset auto-on circuit of claim 4, wherein the switching unit comprises a first transistor, a third resistor, and a fourth resistor; the first end of the third resistor is connected with the reset circuit, the second end of the third resistor is connected with the base electrode of the first triode, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is connected with the power-on control unit; and the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is grounded.
6. The reset auto-on circuit as claimed in any one of claims 4 to 5, wherein the power-on control unit comprises a fifth resistor, a third diode, a fourth diode and a switch key; wherein,
the first end of the fifth resistor is connected with a second power supply, and the second end of the fifth resistor is connected with the microcontroller;
the anode of the third diode is connected with the second end of the fifth resistor, and the cathode of the third diode is connected with the switch unit;
the cathode of the fourth diode is grounded through the switch key, and the anode of the fourth diode is connected with the power supply circuit.
7. The reset auto-on circuit of claim 1, wherein the power-on supply circuit comprises a sixth resistor, a seventh resistor and a MOS transistor; the source electrode of the MOS tube is connected with a third power supply, the drain electrode of the MOS tube is connected with a fourth power supply, and the grid electrode of the MOS tube is connected with the first end of the sixth resistor; a second end of the sixth resistor is connected with the power-on detection circuit; the first end of the seventh resistor is connected with the source electrode of the MOS tube, and the second end of the seventh resistor is connected with the first end of the sixth resistor.
8. The reset auto-on circuit of claim 7, wherein the power-on supply circuit further comprises a second capacitor, a first terminal of the second capacitor is connected to the source of the MOS transistor, and a second terminal of the second capacitor is connected to the gate of the MOS transistor.
9. The reset auto-on circuit as claimed in any one of claims 7 to 8, wherein the power-on supply circuit further comprises a second transistor, an eighth resistor and a ninth resistor; a collector of the second triode is connected with a second end of the sixth resistor, an emitter of the second triode is grounded, a base of the second triode is connected with a first end of the eighth resistor, and a second end of the eighth resistor is connected with the microcontroller; and the first end of the ninth resistor is connected with the base electrode of the second triode, and the second end of the ninth resistor is grounded.
10. An electronic device, comprising the reset auto-on circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821234007.XU CN208508901U (en) | 2018-08-01 | 2018-08-01 | Reset automatic boot circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821234007.XU CN208508901U (en) | 2018-08-01 | 2018-08-01 | Reset automatic boot circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208508901U true CN208508901U (en) | 2019-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821234007.XU Expired - Fee Related CN208508901U (en) | 2018-08-01 | 2018-08-01 | Reset automatic boot circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208508901U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634454A (en) * | 2019-09-25 | 2019-12-31 | 京东方科技集团股份有限公司 | Switch time sequence control circuit and method and display device |
| CN111321948A (en) * | 2020-02-21 | 2020-06-23 | 德施曼机电（中国）有限公司 | Intelligent lock with reset function |
-
2018
- 2018-08-01 CN CN201821234007.XU patent/CN208508901U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634454A (en) * | 2019-09-25 | 2019-12-31 | 京东方科技集团股份有限公司 | Switch time sequence control circuit and method and display device |
| CN111321948A (en) * | 2020-02-21 | 2020-06-23 | 德施曼机电（中国）有限公司 | Intelligent lock with reset function |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |