CN214045589U - Protection circuit and intelligent terminal of system upgrade - Google Patents
Protection circuit and intelligent terminal of system upgrade Download PDFInfo
- Publication number
- CN214045589U CN214045589U CN202022927875.XU CN202022927875U CN214045589U CN 214045589 U CN214045589 U CN 214045589U CN 202022927875 U CN202022927875 U CN 202022927875U CN 214045589 U CN214045589 U CN 214045589U
- Authority
- CN
- China
- Prior art keywords
- key
- resistor
- diode
- protection circuit
- control module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a protection circuit for system upgrade, which comprises a control module, a first key and a second key; a control pin of the control module is connected with a first end of a first resistor, a second end of the first resistor is connected with an anode of a first diode, a cathode of the first diode is connected with a first end of a second resistor, a second end of the second resistor is connected with a first key, and a cathode of the first diode is also connected with a power supply pin of the control module; the second end of the first resistor is also connected with the anode of a second diode, and the cathode of the second diode is connected with the second key; the resistance value of the second resistor is 10-30 times that of the first resistor. The utility model also provides an intelligent terminal. The utility model provides a protection circuit and intelligent terminal of system upgrade has avoided intelligent terminal at system upgrade in-process, because the maloperation or be in the special environment and press the power key and the problem of the failed upgrading that leads to has reduced the cost of doing over again and tearing open the quick-witted maintenance, reduce the visitor and complain, have reduced the repair rate.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of circuits, especially, relate to a protection circuit and intelligent terminal of system upgrade.
[ background of the invention ]
At present, the software version update iteration of an intelligent terminal (such as a smart phone) is fast, and the system software is frequently required to be updated online. A circuit diagram of a connection circuit between a power key and a system control module of an existing intelligent terminal is shown in fig. 1, when a software version of the terminal is upgraded, if a user presses the power key due to misoperation or a special environment, a high level signal of a power pin of the control module is conducted with a low level of a ground signal, and system on/off interruption is triggered.
In view of the above, it is desirable to provide a novel protection circuit for system upgrade and an intelligent terminal to overcome the above-mentioned drawbacks.
[ Utility model ] content
The utility model aims at providing a protection circuit and intelligent terminal of system upgrade can avoid intelligent terminal at system upgrade in-process, because the maloperation or be in the problem of the upgrading failure that special environment pressed the power key and lead to, can reduce the cost of doing over again and tearing open the quick-witted maintenance, reduce the visitor and complain, have reduced the rate of reprocessing.
In order to achieve the above object, in a first aspect, the present invention provides a protection circuit for system upgrade, including a control module, a first button and a second button; a control pin of the control module is connected with a first end of a first resistor, a second end of the first resistor is connected with an anode of a first diode, a cathode of the first diode is connected with a first end of a second resistor, a second end of the second resistor is connected with the first key, and a cathode of the first diode is also connected with a power supply pin of the control module; the second end of the first resistor is also connected with the anode of a second diode, and the cathode of the second diode is connected with the second key; the resistance value of the second resistor is 10-30 times that of the first resistor.
In a preferred embodiment, the second button is further connected to a function pin of the control module through a third resistor.
In a preferred embodiment, the first diode and the second diode are schottky diodes.
In a preferred embodiment, the first key includes a first signal terminal and a first ground terminal, and the first signal terminal is connected to the second terminal of the second resistor; the second key comprises a second signal end and a second grounding end, and the second signal end is connected with the cathode of the second diode.
In a preferred embodiment, the first key is a power key, and the second key is a volume up key.
In a preferred embodiment, the resistance of the second resistor is 22 times the resistance of the first resistor.
In a preferred embodiment, the control module is a CPU or an MCU.
In a second aspect, the present invention further provides an intelligent terminal, which includes any one of the above protection circuits for system upgrade.
Compared with the prior art, the utility model provides a protection circuit and intelligent terminal of system upgrade, through the control pin with control module through first resistance, first diode, the first button of second ohmic connection, and control pin still through first resistance, the second button is connected to the second diode, control module's power pin is still connected to the negative pole of first diode, when system upgrade has been realized, only press first button and second button all, can lead to system upgrade failure, and press first button alone and can not lead to system upgrade failure, intelligent terminal has been avoided at system upgrade in-process, because maloperation or be in the problem of the upgrade failure that special environment pressed first button and lead to, the cost of reworking and dismantling the quick-witted maintenance has been reduced, reduce and complain, the rework rate has been reduced.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram illustrating a connection between a power key and a system control module of a conventional intelligent terminal;
fig. 2 is a circuit diagram of a protection circuit for system upgrade provided by the present invention.
[ detailed description ] embodiments
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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, the present invention provides a protection circuit 100 for system upgrade, which includes a control module 10, a first button J1 and a second button J2.
A control pin GPIO _ KEY _ SW of the control module 10 is connected to a first end of a first resistor R1, a second end of the first resistor R1 is connected to an anode of a first diode D1, a cathode of the first diode D1 is connected to a first end of a second resistor R2, a second end of the second resistor R2 is connected to a first KEY J1, and a cathode of the first diode D1 is further connected to a power supply pin PWRKEY _ ON of the control module 10. The second end of the first resistor R1 is further connected to the anode of a second diode D2, and the cathode of the second diode D2 is connected to the second key J2. Specifically, the resistance of the second resistor R2 is 10-30 times that of the first resistor R1.
When the system is upgraded, the control pin GPIO _ KEY _ SW of the control module 10 is at a high level, if the first KEY J1 is closed and the second KEY J2 is not closed, the control pin GPIO _ KEY _ SW is connected to the first KEY J1 through the first resistor R1, the first diode D1, and the second resistor R2, the first resistor R1 and the second resistor R2 divide the voltage, since the resistance of the second resistor R2 is 10-30 times that of the first resistor R1, the second resistor R2 is much larger than the first resistor R1, the voltage of the power supply pin PWRKEY _ ON of the control module 10 is close to the voltage difference between the voltage of the control pin GPIO _ KEY _ SW and the turn-ON voltage of the first diode D1, it can be understood that, based ON the characteristics of the diodes, the turn-ON voltage of the first diode D1 is smaller, the voltage of the power supply pin PWRKEY _ ON is determined to be a high level, the condition of triggering the shutdown of the system is not met, and the intelligent terminal can keep the system upgrading state. Namely, when the system is upgraded, the first key J1 is pressed alone, so that the system upgrading is not failed.
Further, when the system is upgraded, if the first KEY J1 and the second KEY J2 are both closed, the control pin GPIO _ KEY _ SW is connected to the first KEY J1 through the first resistor R1, the first diode D1 and the second resistor R2, and the control pin GPIO _ KEY _ SW is also connected to the second KEY J2 through the first resistor R1 and the second diode D2, at this time, the voltage of the anode of the second diode D2 is the turn-ON voltage of the second diode D2, that is, the voltage of the anode of the first diode D1 is the turn-ON voltage, the voltage of the cathode of the first diode D1 must be a low level, that is, the voltage of the power pin PWRKEY _ ON is determined to be a low level, the system shutdown is triggered, and the intelligent terminal stops upgrading. That is, only pressing the first button J1 and the second button J2 during system upgrade will cause system upgrade failure.
Therefore, the protection circuit 100 for system upgrade provided by the present invention connects the control pin GPIO _ KEY _ SW of the control module 10 to the first KEY J1 through the first resistor R1, the first diode D1, and the second resistor R2, and the control pin GPIO _ KEY _ SW is further connected to the second KEY J2 through the first resistor R1 and the second diode D2, and the cathode of the first diode D1 is further connected to the power pin PWRKEY _ ON of the control module 10, so that when the system is upgraded, only pressing the first button J1 and the second button J2 will result in the failure of system upgrade, and the single pressing of the first key J1 will not cause the system upgrade failure, thereby avoiding the problems that the intelligent terminal has no need to upgrade the system, due to the problem of upgrading failure caused by misoperation or pressing of the first button J1 in a special environment, the rework disassembly and maintenance cost is reduced, customer complaints are reduced, and the rework rate is reduced.
It can be understood that, considering the level requirement and the anti-static requirement of the power pin PWRKEY _ ON of the control module 10 comprehensively, the resistance value of the second resistor R2 is defined as 10-30 times that of the first resistor R1, specifically, the resistance value of the second resistor R2 is 22 times that of the first resistor R1, in this embodiment, the resistance value of the first resistor R1 is 100 ohms, and the resistance value of the second resistor R2 is 2.2 kohms.
Further, the first key J1 includes a first signal terminal a1 and a first ground terminal a, and the first signal terminal a1 is connected to the second terminal of the second resistor R2, it can be understood that when the first key J1 is pressed, the first signal terminal a1 is connected to the first ground terminal a, i.e., the first signal terminal a1 is connected to ground. The second button J2 includes a second signal terminal B1 and a second ground terminal B, the second signal terminal B1 is connected to the cathode of the second diode D2, it can be understood that when the second button J2 is pressed, the second signal terminal B1 is connected to the second ground terminal B, i.e., the second signal terminal B1 is connected to ground.
In this embodiment, the first key J1 is a power key, and the second key J2 is a volume up key, and generally, the physical location of the volume up key is not close to the power key, and the middle of the volume up key may be separated from the volume down key, or located on both sides of the intelligent terminal. It can be understood that when the intelligent terminal is in a normal working state (i.e. when the system is not upgraded), the power key can still realize the function of controlling the intelligent terminal to be powered on and powered off.
Further, the second key J2 is further connected to the function pin VOLUME _ UP of the control module 10 through a third resistor R3, so that when the intelligent terminal normally operates, the second key J2 can implement its function, for example, when the second key J2 is a VOLUME UP key, the function of adding VOLUME can be implemented.
Specifically, the control module 10 may be a CPU (Central Processing Unit) or an MCU (micro controller Unit), and when the system is upgraded, the voltage of the control pin GPIO _ KEY _ SW of the control module 10 is 1.8V. In this embodiment, the first diode D1 and the second diode D2 are both schottky diodes, and the on voltage of the schottky diodes is reduced to 0.3V.
The utility model provides a protection circuit 100's of system upgrade principle as follows:
when the system is upgraded, the control pin GPIO _ KEY _ SW of the control module 10 outputs a high level of 1.8V, if the first KEY J1 is closed and the second KEY J2 is not closed, the control pin GPIO _ KEY _ SW is connected to the first KEY J1 through the first resistor R1, the first diode D1 and the second resistor R2, the first resistor R1 and the second resistor R2 divide voltage, the voltage of the power pin PWRKEY _ ON of the control module 10 is close to the voltage difference between the voltage 1.8V of the control pin GPIO _ KEY _ SW and the conducting voltage 0.3V of the first diode D1, that is, the voltage of the power pin PWRKEY _ ON of the control module 10 is close to 1.5V, the voltage of the power pin pwey _ ON is a high level, and the condition of triggering shutdown of the system is not met, and the intelligent terminal can maintain the system upgrade state. Namely, when the system is upgraded, the first key J1 is pressed alone, so that the system upgrading is not failed.
Further, when the system is upgraded, if the first KEY J1 and the second KEY J2 are both closed, the control pin GPIO _ KEY _ SW is connected to the first KEY J1 through the first resistor R1, the first diode D1 and the second resistor R2, and the control pin GPIO _ KEY _ SW is further connected to the second KEY J2 through the first resistor R1 and the second diode D2, at this time, the voltage of the anode of the second diode D2 is 0.3V which is the turn-ON voltage of the second diode D2, that is, the voltage of the anode of the first diode D1 is 0.3V, the voltage of the cathode of the first diode D1 is 0V, that is, the voltage of the power supply pin PWRKEY _ ON is low level, the system shutdown is triggered, and the intelligent terminal stops upgrading. That is, only pressing the first button J1 and the second button J2 during system upgrade will cause system upgrade failure.
The utility model also provides an intelligent terminal, including any one of the above-mentioned embodiment protection circuit 100 of system upgrade, can understand that intelligent terminal can be for, but not limited to the cell-phone. It should be noted that the utility model provides an all embodiments of protection circuit 100 of system upgrade all are applicable to the utility model provides an intelligent terminal, and the homoenergetic reaches same or similar beneficial effect.
In summary, the protection circuit 100 for system upgrade and the intelligent terminal provided by the present invention connect the control pin GPIO _ KEY _ SW of the control module 10 to the first KEY J1 through the first resistor R1, the first diode D1, and the second resistor R2, and the control pin GPIO _ KEY _ SW is further connected to the second KEY J2 through the first resistor R1 and the second diode D2, and the cathode of the first diode D1 is further connected to the power pin PWRKEY _ ON of the control module 10, so that when the system is upgraded, only pressing the first button J1 and the second button J2 will result in the failure of system upgrade, and the single pressing of the first key J1 will not cause the system upgrade failure, thereby avoiding the problems that the intelligent terminal has no need to upgrade the system, due to the problem of upgrading failure caused by misoperation or pressing of the first button J1 in a special environment, the rework disassembly and maintenance cost is reduced, customer complaints are reduced, and the rework rate is reduced.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A protection circuit for system upgrade is characterized by comprising a control module, a first key and a second key; a control pin of the control module is connected with a first end of a first resistor, a second end of the first resistor is connected with an anode of a first diode, a cathode of the first diode is connected with a first end of a second resistor, a second end of the second resistor is connected with the first key, and a cathode of the first diode is also connected with a power supply pin of the control module; the second end of the first resistor is also connected with the anode of a second diode, and the cathode of the second diode is connected with the second key; the resistance value of the second resistor is 10-30 times that of the first resistor.
2. The system-upgraded protection circuit of claim 1, wherein the second key is further connected to a function pin of the control module through a third resistor.
3. The system-upgraded protection circuit of claim 1, wherein the first diode and the second diode are both schottky diodes.
4. The protection circuit for system upgrade according to claim 1, wherein the first button includes a first signal terminal and a first ground terminal, the first signal terminal is connected to the second terminal of the second resistor; the second key comprises a second signal end and a second grounding end, and the second signal end is connected with the cathode of the second diode.
5. The protection circuit for system upgrade of claim 1, wherein said first key is a power key and said second key is a volume up key.
6. The system-upgraded protection circuit of claim 1, wherein the second resistor has a resistance value 22 times greater than the first resistor.
7. The system-upgraded protection circuit of claim 1, wherein the control module is a CPU or an MCU.
8. An intelligent terminal, characterized in that it comprises a protection circuit upgraded by a system according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022927875.XU CN214045589U (en) | 2020-12-09 | 2020-12-09 | Protection circuit and intelligent terminal of system upgrade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022927875.XU CN214045589U (en) | 2020-12-09 | 2020-12-09 | Protection circuit and intelligent terminal of system upgrade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214045589U true CN214045589U (en) | 2021-08-24 |
Family
ID=77335391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022927875.XU Active CN214045589U (en) | 2020-12-09 | 2020-12-09 | Protection circuit and intelligent terminal of system upgrade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214045589U (en) |
-
2020
- 2020-12-09 CN CN202022927875.XU patent/CN214045589U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7949886B2 (en) | Power supply system for motherboard | |
| CN101576764B (en) | CMOS data clear circuit | |
| CN101256437A (en) | Mainboard voltage feed circuit | |
| CN106534405B (en) | Pin control method and intelligent terminal | |
| CN102856933A (en) | Universal serial bus (USB) charging circuit | |
| CN109032318B (en) | Power supply monitoring system and storage server system | |
| CN107482755B (en) | Power switching method and switching circuit of electronic equipment | |
| US8200997B2 (en) | Computer wake up circuit includes a switch configured to prevent a control signals from an I/O controller being transmitted to south-bridge | |
| CN1959595A (en) | Reset circuit of computer system | |
| CN214045589U (en) | Protection circuit and intelligent terminal of system upgrade | |
| CN113708467B (en) | Electrifying circuit, battery backup unit and storage server system | |
| CN1862450A (en) | Battery failure warning controlling circuit | |
| CN114089714B (en) | portable electronic device | |
| CN109725671B (en) | Circuit and method for enhancing load transient response compensation | |
| CN112269463A (en) | Power-down protection circuit and method and electric energy meter | |
| CN107731260B (en) | SSD power supply method and system and SSD | |
| CN111124826A (en) | Method and system for protecting normal power-on start of CPU | |
| CN100454215C (en) | Computer system reset circuit | |
| CN210578243U (en) | Starting circuit and chip starting device | |
| CN217787726U (en) | Switch control device | |
| CN215987227U (en) | Computer and mainboard and wake-up circuit thereof | |
| CN116500689B (en) | Wireless low-power-consumption material level detection device and method and electronic equipment | |
| US9553447B2 (en) | Electronic device and motherboard and protecting circuit of electronic device | |
| CN220691283U (en) | Singlechip microcomputer | |
| CN216162442U (en) | Voltage buffer control circuit of Internet of things device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |