CN210015422U - Single chip microcomputer control circuit and intelligent terminal applying same - Google Patents
Single chip microcomputer control circuit and intelligent terminal applying same Download PDFInfo
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- CN210015422U CN210015422U CN201921005866.6U CN201921005866U CN210015422U CN 210015422 U CN210015422 U CN 210015422U CN 201921005866 U CN201921005866 U CN 201921005866U CN 210015422 U CN210015422 U CN 210015422U
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Abstract
The utility model discloses a singlechip control circuit and an intelligent terminal applying the circuit, which comprises a singlechip normal power supply circuit and a power supply control circuit; the normal power supply circuit of the singlechip comprises a voltage stabilizing circuit, and the input end of the voltage stabilizing circuit is connected with a power supply of the singlechip; the power supply control circuit comprises a controllable switch connected between the input end of the voltage stabilizing circuit and the power supply of the single chip microcomputer, a controllable switch activation circuit, a controllable switch self-locking circuit and a single chip microcomputer hard start control circuit; the single chip microcomputer hard start control circuit is connected into the controllable switch self-locking circuit, when the single chip microcomputer is in a dead halt state, the single chip microcomputer hard start control circuit controls the power supply control circuit to execute the power-off action of the single chip microcomputer, the controllable switch activation circuit and the normal power supply circuit of the single chip microcomputer are connected with the power supply of the single chip microcomputer again, the hardware restart of the single chip microcomputer is completed, and the problem that the single chip microcomputer cannot be reset when the single chip microcomputer is in the dead halt state is. The utility model discloses reaction rate is fast, reliable and stable, simple structure, and is with low costs.
Description
Technical Field
The utility model relates to an electronic control technical field especially relates to a single chip microcomputer control circuit and applied this circuit's intelligent terminal.
Background
In recent years, with the development of science and technology, single-chip microcomputers have been widely applied to electronic products such as bluetooth headsets, tablet computers, smart phones, smart televisions, personal computers, notebook computers, personal medical equipment and the like, and bring convenience to the production and life of people.
The problem that generally exists at present is that along with the increase of electronic product live time, the electronic product often appears the condition of halting, and to this kind of condition, the measure that the producer took is to increase the reset key on electronic product, carries out the initialization through the reset key.
However, the method for solving the problem of the electronic product crash through the reset key is effective only on the premise that the single chip microcomputer of the electronic product is not crashed, once the single chip microcomputer in the electronic product crashes, no matter how the user resets, no effect is played, at the moment, the electronic product can only be in a 'paralyzed' state, the life and the use of the user are influenced slightly, and serious accidents can be caused by the crash of the electronic product in some special scenes.
The above problems are urgently needed to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the above background art part mentioned through the intelligent terminal of a single chip microcomputer control circuit and applied this circuit.
To achieve the purpose, the utility model adopts the following technical proposal:
a kind of one-chip computer control circuit, it includes normal power supply circuit and power supply control circuit of the one-chip computer; the normal power supply circuit of the single chip microcomputer comprises a voltage stabilizing circuit, and the input end of the voltage stabilizing circuit is connected with a power supply of the single chip microcomputer; the power supply control circuit comprises a controllable switch, a controllable switch activation circuit, a controllable switch self-locking circuit and a singlechip hard start control circuit, wherein the controllable switch, the controllable switch activation circuit, the controllable switch self-locking circuit and the singlechip hard start control circuit are connected between the input end of the voltage stabilizing circuit and a singlechip power supply; the single chip microcomputer hard start control circuit is connected into the controllable switch self-locking circuit, and when the single chip microcomputer is halted, the single chip microcomputer hard start control circuit controls the power supply control circuit to execute the power-off action of the single chip microcomputer.
Particularly, the controllable switch connected between the input end of the voltage stabilizing circuit and the power supply of the single chip microcomputer is a switch tube Q1, the grid electrode of the switch tube Q1 is connected with the controllable switch activation circuit, the drain electrode of the switch tube Q1 is connected with the input end of the voltage stabilizing circuit, and the source electrode of the switch tube Q1 is connected with the power supply end VCC.
In particular, the voltage stabilizing circuit includes a voltage regulator VR 1; the input end Vin of the voltage stabilizer VR1 is connected with the controllable switch, the output end Vout is connected with the singlechip to be powered, and the ground end GND is grounded.
In particular, the controllable switch activation circuit comprises a resistor R1, a diode D1, a capacitor C1, a switch key SK1 and a resistor R2; one end of the resistor R1 is connected with a power supply of the singlechip, the other end of the resistor R1 is connected with the anode of the diode D1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the diode D1 is connected with one end of the on-off key SK1 and one end of the resistor R2, the other end of the on-off key SK1 is grounded, and the other end of the resistor R2 is connected with the controllable switch.
Particularly, the controllable switch connected between the input end of the voltage stabilizing circuit and the POWER supply of the single chip microcomputer is a switch tube Q1, the controllable switch self-locking circuit comprises a switch tube Q2, the grid electrode of the switch tube Q1 is connected with the drain electrode of the switch tube Q2 and the controllable switch activation circuit, the drain electrode of the switch tube Q1 is connected with the input end of the voltage stabilizing circuit, the source electrode of the switch tube Q1 is connected with a VCC POWER supply end, the grid electrode of the switch tube Q2 is connected with a POWER _ ON pin of the single chip microcomputer to be powered, and the source electrode of the switch tube Q2 is grounded.
Particularly, the voltage stabilizing circuit specifically comprises a resistor R4, a capacitor C2, a capacitor C3, a voltage stabilizer VR1, a capacitor C4 and a resistor R5; one end of the resistor R4 is connected with a controllable switch, the other end of the resistor R4 is connected with one end of the capacitor C2, one end of the capacitor C3 and the input end of the voltage stabilizer VR1, the other end of the capacitor C2 is connected with the other end of the capacitor C3, the ground end GND of the voltage stabilizer VR1, one end of the capacitor C4 and one end of the resistor R5 are connected and then grounded, and the output end Vout of the voltage stabilizer VR1 is connected with the other end of the capacitor C4 and the other end of the resistor R5 and then connected with a single chip.
Particularly, the controllable switch connected between the input end of the voltage stabilizing circuit and the power supply of the singlechip is a switching tube Q1, and the controllable switch self-locking circuit specifically comprises a diode D2, a resistor R3, a resistor R6, a voltage stabilizing diode ZD1, a resistor R7, a switching tube Q2 and a resistor R8; the anode of the diode D2 is connected with a POWER _ ON pin of a to-be-powered single chip microcomputer, the cathode of the diode D2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the cathode of a zener diode ZD1, one end of a resistor R7 and the gate of a switch tube Q2, the anode of the zener diode ZD1 is connected with the other end of a resistor R7 and the source of the switch tube Q2 and then grounded, the other end of a hard start switch SK2 is grounded, the drain of the switch tube Q2 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with a controllable switch activation circuit, one end of a resistor R3 and the gate of a switch tube Q1, the other end of the resistor R3 is connected with the source of the switch tube Q1 and then connected with a POWER supply terminal VCC, and the drain of.
Particularly, the singlechip hard start control circuit comprises a hard start switch SK 2; one end of the hard start switch SK2 is grounded, and the other end is connected with the gate of the switch tube Q2.
In particular, the switching tube Q1 adopts a P-channel enhancement mode field effect transistor; the switching tube Q2 adopts an N-channel enhancement type field effect tube.
The utility model also discloses an intelligent terminal, this intelligent terminal includes above-mentioned single chip microcomputer control circuit.
The utility model provides a singlechip control circuit is independent of the traditional software reset system of singlechip, to using singlechip control circuit's intelligent terminal, when the singlechip crashes, through the action of singlechip hard start control circuit control power supply control circuit execution singlechip outage, through controllable switch activation circuit, the normal supply circuit of singlechip switch on the singlechip power again, the completion restarts to the hardware of singlechip, the problem that can't reset when thoroughly having solved the singlechip crash. The utility model discloses not only reaction rate is fast, and is reliable and stable, simple structure moreover, and is with low costs, suitable popularization and application.
Drawings
Fig. 1 is a schematic block diagram of a single chip microcomputer control circuit provided by an embodiment of the present invention;
fig. 2 is a structural diagram of a control circuit of a single chip microcomputer provided by the embodiment of the present invention;
fig. 3 is a control logic diagram of the single chip microcomputer control circuit provided by the embodiment of the present invention;
fig. 4 is a schematic diagram of an intelligent terminal using a single-chip microcomputer control circuit provided by the embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example one
Referring to fig. 1, fig. 1 is a schematic block diagram of a single chip microcomputer control circuit according to an embodiment of the present invention. In this embodiment, the control circuit 100 of the single chip microcomputer specifically includes a normal power supply circuit and a power supply control circuit of the single chip microcomputer; the normal power supply circuit of the single chip microcomputer comprises a voltage stabilizing circuit 101, and the input end of the voltage stabilizing circuit 101 is connected with a power supply of the single chip microcomputer; the power supply control circuit comprises a controllable switch 102, a controllable switch activation circuit 103, a controllable switch self-locking circuit 104 and a singlechip hard start control circuit 105, wherein the controllable switch 102, the controllable switch activation circuit 103, the controllable switch self-locking circuit 104 and the singlechip hard start control circuit 105 are connected between the input end of the voltage stabilizing circuit 101 and a singlechip power supply; the singlechip hard start control circuit 105 is connected into the controllable switch self-locking circuit 104, and when the singlechip is halted, the singlechip hard start control circuit 105 controls the power supply control circuit to execute the singlechip power-off action.
Specifically, when the power supply circuit works, the controllable switch activation circuit 103 works, the power supply of the single chip microcomputer is switched on, the normal power supply circuit of the single chip microcomputer works, the voltage stabilizing circuit 101 outputs stable voltage to the single chip microcomputer to be powered, and the single chip microcomputer works normally; when the single chip microcomputer crashes, the single chip microcomputer hard start control circuit 105 controls the power supply control circuit to execute the power-off action of the single chip microcomputer, the controllable switch activation circuit 103 and the normal power supply circuit of the single chip microcomputer are used for switching on the power supply of the single chip microcomputer again, and the hardware restart of the single chip microcomputer is completed.
Example two
The singlechip control circuit in the embodiment specifically comprises a normal singlechip power supply circuit and a power supply control circuit; the normal power supply circuit of the single chip microcomputer comprises a voltage stabilizing circuit, and the input end of the voltage stabilizing circuit is connected with a power supply of the single chip microcomputer; the power supply control circuit comprises a controllable switch, a controllable switch activation circuit, a controllable switch self-locking circuit and a singlechip hard start control circuit, wherein the controllable switch, the controllable switch activation circuit, the controllable switch self-locking circuit and the singlechip hard start control circuit are connected between the input end of the voltage stabilizing circuit and a singlechip power supply; the single chip microcomputer hard start control circuit is connected into the controllable switch self-locking circuit, and when the single chip microcomputer is halted, the single chip microcomputer hard start control circuit controls the power supply control circuit to execute the power-off action of the single chip microcomputer.
In this embodiment, the controllable switch connected between the input end of the voltage stabilizing circuit and the power supply of the single chip microcomputer is a switching tube Q1, the gate of the switching tube Q1 is connected to the controllable switch activation circuit, the drain of the switching tube Q1 is connected to the input end of the voltage stabilizing circuit, and the source of the switching tube Q1 is connected to the power supply terminal VCC. The voltage stabilizing circuit comprises a voltage stabilizer VR 1; the input end Vin of the voltage stabilizer VR1 is connected with the controllable switch, the output end Vout is connected with the singlechip to be powered, and the ground end GND is grounded.
In the present embodiment, the controllable switch activation circuit includes a resistor R1, a diode D1, a capacitor C1, a switch key SK1, and a resistor R2; one end of the resistor R1 is connected with a power supply of the singlechip, the other end of the resistor R1 is connected with the anode of the diode D1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the diode D1 is connected with one end of the on-off key SK1 and one end of the resistor R2, the other end of the on-off key SK1 is grounded, and the other end of the resistor R2 is connected with the grid of the switch tube Q1.
In this embodiment, the controllable switch self-locking circuit includes a switching tube Q2, a gate of the switching tube Q1 is connected to a drain of the switching tube Q2 and a controllable switch activation circuit, a drain of the switching tube Q1 is connected to an input end of a voltage stabilizing circuit, a source of the switching tube Q1 is connected to a POWER supply terminal VCC, a gate of the switching tube Q2 is connected to a POWER _ ON pin of a to-be-powered single chip microcomputer, and a source of the switching tube Q2 is grounded. In the embodiment, the single-chip microcomputer hard start control circuit comprises a hard start switch SK 2; one end of the hard start switch SK2 is grounded, and the other end is connected with the gate of the switch tube Q2.
Specifically, when the power on/off key SK1 is pressed, the switching tube Q1 is powered on, and a stable voltage is output to the singlechip to be powered through the voltage stabilizer VR1, so that the singlechip normally works; after the singlechip is powered ON, a pin POWER _ ON high level of the singlechip enables the switch tube Q2 to be powered ON, so that the switch tube Q1 is always in a conducting state, and the singlechip also supplies POWER even if the POWER ON/off key SK1 is released; when the single chip microcomputer crashes, the hard start switch SK2 is pressed, the switch tube Q2 is turned off at the moment, the switch tube Q1 is also turned off (the SK1 is loosened at the moment), the single chip microcomputer is finally powered off, the system enters a power-off state, the power-on process of the single chip microcomputer is repeated if the power-on and power-off key SK1 is pressed again at the moment, the power-off restart of the single chip microcomputer is completed, and the hardware restart of the single chip microcomputer in the crash state is finally realized.
In the embodiment, the startup and shutdown key SK1 sends out a trigger signal for the trigger switch, the hard startup switch SK2 sends out an interruption signal for the interruption switch, and mutual locking of the power supplies of the single chip microcomputer is achieved through the controllable switch activation circuit and the controllable switch self-locking circuit. The utility model has simple circuit, fast protection reaction speed, high reliability and low cost; the cut-off switch SK2 is relatively independent of the software reset system of the single chip microcomputer, and when the single chip microcomputer is crashed, the hardware can be restarted through the cut-off switch SK 2.
EXAMPLE III
The singlechip control circuit in the embodiment specifically comprises a normal singlechip power supply circuit and a power supply control circuit; the normal power supply circuit of the single chip microcomputer comprises a voltage stabilizing circuit, and the input end of the voltage stabilizing circuit is connected with a power supply of the single chip microcomputer; the power supply control circuit comprises a controllable switch, a controllable switch activation circuit, a controllable switch self-locking circuit and a singlechip hard start control circuit, wherein the controllable switch, the controllable switch activation circuit, the controllable switch self-locking circuit and the singlechip hard start control circuit are connected between the input end of the voltage stabilizing circuit and a singlechip power supply; the single chip microcomputer hard start control circuit is connected into the controllable switch self-locking circuit, and when the single chip microcomputer is halted, the single chip microcomputer hard start control circuit controls the power supply control circuit to execute the power-off action of the single chip microcomputer.
As shown in fig. 2, fig. 2 is the single chip microcomputer control circuit structure chart that the embodiment of the utility model provides a, in this embodiment the access controllable switch between voltage stabilizing circuit input and the singlechip power supply is switch tube Q1, controllable switch activation circuit is connected to switch tube Q1's grid, and voltage stabilizing circuit's input is connected to switch tube Q1's drain electrode, and power end VCC is connected to switch tube Q1's source electrode. The voltage stabilizing circuit specifically comprises a resistor R4, a capacitor C2, a capacitor C3, a voltage stabilizer VR1, a capacitor C4 and a resistor R5; one end of the resistor R4 is connected with the drain of the switch tube Q1, the other end of the resistor R4 is connected with one end of the capacitor C2, one end of the capacitor C3 and the input end of the voltage stabilizer VR1, the other end of the capacitor C2 is connected with the other end of the capacitor C3, the ground end GND of the voltage stabilizer VR1, one end of the capacitor C4 and one end of the resistor R5 are connected and then grounded, and the output end Vout of the voltage stabilizer VR1 is connected with the other end of the capacitor C4 and the other end of the resistor R5 and then connected with the. The controllable switch activation circuit comprises a resistor R1, a diode D1, a capacitor C1, a switch key SK1 and a resistor R2; one end of the resistor R1 is connected with a power supply of the singlechip, the other end of the resistor R1 is connected with the anode of the diode D1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the diode D1 is connected with one end of the on-off key SK1 and one end of the resistor R2, the other end of the on-off key SK1 is grounded, and the other end of the resistor R2 is connected with the grid of the switch tube Q1. The controllable switch self-locking circuit specifically comprises a diode D2, a resistor R3, a resistor R6, a voltage stabilizing diode ZD1, a resistor R7, a switching tube Q2 and a resistor R8; the anode of the diode D2 is connected with a POWER _ ON pin of a to-be-powered single chip microcomputer, the cathode of the diode D2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the cathode of a zener diode ZD1, one end of a resistor R7 and the gate of a switch tube Q2, the anode of the zener diode ZD1 is connected with the other end of a resistor R7 and the source of the switch tube Q2 and then grounded, the other end of a hard start switch SK2 is grounded, the drain of the switch tube Q2 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with a controllable switch activation circuit, one end of a resistor R3 and the gate of a switch tube Q1, the other end of the resistor R3 is connected with the source of the switch tube Q1 and then connected with a POWER supply terminal VCC, and the drain of. The singlechip hard start control circuit comprises a hard start switch SK 2; one end of the hard start switch SK2 is grounded, and the other end is connected to the gate of the switching tube Q2, and it should be noted that the hard start switch SK2 is not limited to this embodiment, and may be connected to other circuit positions such as the gate of the switching tube Q1, as long as the hard start switch SK2 is closed, the switching tube Q1 may be turned off at a low level. In this embodiment, the switching transistor Q1 is a P-channel enhancement mode fet, and the switching transistor Q2 is an N-channel enhancement mode fet.
Specifically, when the power on/off key SK1 is pressed, the switching tube Q1 is powered on, and a stable voltage is output to the singlechip to be powered through the voltage stabilizer VR1, so that the singlechip normally works; after the singlechip is powered ON, a pin POWER _ ON high level of the singlechip enables the switch tube Q2 to be powered ON, so that the switch tube Q1 is always in a conducting state, and the singlechip also supplies POWER even if the POWER ON/off key SK1 is released; when the single chip microcomputer crashes, the hard start switch SK2 is pressed, the switch tube Q2 is turned off at the moment, the switch tube Q1 is also turned off (the SK1 is loosened at the moment), the single chip microcomputer is finally powered off, the system enters a power-off state, the power-on process of the single chip microcomputer is repeated if the power-on and power-off key SK1 is pressed again at the moment, the power-off restart of the single chip microcomputer is completed, and the hardware restart of the single chip microcomputer in the crash state is finally realized.
As shown in fig. 3, fig. 3 is the control logic sketch of the single chip microcomputer control circuit provided by the embodiment of the present invention, in this embodiment, the startup and shutdown key SK1 sends a trigger signal for the trigger switch, the hard start switch SK2 sends an interruption signal for the interruption switch, and the mutual locking of the single chip microcomputer power supply is realized through the controllable switch activation circuit and the controllable switch self-locking circuit. The utility model has simple circuit, fast protection reaction speed, high reliability and low cost; the cut-off switch SK2 is relatively independent of the software reset system of the single chip microcomputer, and when the single chip microcomputer is crashed, the hardware can be restarted through the cut-off switch SK 2.
Example four
As shown in fig. 4, fig. 4 is a schematic view of the intelligent terminal using the single-chip microcomputer control circuit provided in the embodiment of the present invention. In this embodiment, the intelligent terminal 400 includes the single chip microcomputer control circuit described in any one of the first embodiment, the second embodiment and the third embodiment, the intelligent terminal 400 may be an electronic product such as a computer, a notebook, a mobile phone and the like, and the specific working principle, process and effect of the single chip microcomputer control circuit in the intelligent terminal 400 are the same as those in the three embodiments, and are not described herein again.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A singlechip control circuit is characterized by comprising a normal power supply circuit and a power supply control circuit of a singlechip; the normal power supply circuit of the single chip microcomputer comprises a voltage stabilizing circuit, and the input end of the voltage stabilizing circuit is connected with a power supply of the single chip microcomputer; the power supply control circuit comprises a controllable switch, a controllable switch activation circuit, a controllable switch self-locking circuit and a singlechip hard start control circuit, wherein the controllable switch, the controllable switch activation circuit, the controllable switch self-locking circuit and the singlechip hard start control circuit are connected between the input end of the voltage stabilizing circuit and a singlechip power supply; the single chip microcomputer hard start control circuit is connected into the controllable switch self-locking circuit, and when the single chip microcomputer is halted, the single chip microcomputer hard start control circuit controls the power supply control circuit to execute the power-off action of the single chip microcomputer.
2. The SCM control circuit according to claim 1, wherein the controllable switch connected between the input end of the voltage stabilizing circuit and the SCM power supply is a switch tube Q1, the gate of the switch tube Q1 is connected with the controllable switch activation circuit, the drain of the switch tube Q1 is connected with the input end of the voltage stabilizing circuit, and the source of the switch tube Q1 is connected with the power supply end VCC.
3. The SCM control circuit according to claim 1, wherein the voltage regulator circuit comprises a voltage regulator VR 1; the input end Vin of the voltage stabilizer VR1 is connected with the controllable switch, the output end Vout is connected with the singlechip to be powered, and the ground end GND is grounded.
4. The single chip microcomputer control circuit according to claim 1, wherein the controllable switch activation circuit comprises a resistor R1, a diode D1, a capacitor C1, a switch key SK1 and a resistor R2; one end of the resistor R1 is connected with a power supply of the singlechip, the other end of the resistor R1 is connected with the anode of the diode D1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the cathode of the diode D1 is connected with one end of the on-off key SK1 and one end of the resistor R2, the other end of the on-off key SK1 is grounded, and the other end of the resistor R2 is connected with the controllable switch.
5. The single chip microcomputer control circuit according to claim 1, wherein the controllable switch connected between the input end of the voltage stabilizing circuit and the POWER supply of the single chip microcomputer is a switch tube Q1, the controllable switch self-locking circuit comprises a switch tube Q2, the gate of the switch tube Q1 is connected with the drain of the switch tube Q2 and the controllable switch activation circuit, the drain of the switch tube Q1 is connected with the input end of the voltage stabilizing circuit, the source of the switch tube Q1 is connected with the POWER supply end VCC, the gate of the switch tube Q2 is connected with the POWER _ ON pin of the single chip microcomputer to be powered, and the source of the switch tube Q2 is grounded.
6. The single chip microcomputer control circuit according to claim 1, wherein the voltage regulator circuit specifically comprises a resistor R4, a capacitor C2, a capacitor C3, a voltage regulator VR1, a capacitor C4, and a resistor R5; one end of the resistor R4 is connected with a controllable switch, the other end of the resistor R4 is connected with one end of the capacitor C2, one end of the capacitor C3 and the input end of the voltage stabilizer VR1, the other end of the capacitor C2 is connected with the other end of the capacitor C3, the ground end GND of the voltage stabilizer VR1, one end of the capacitor C4 and one end of the resistor R5 are connected and then grounded, and the output end Vout of the voltage stabilizer VR1 is connected with the other end of the capacitor C4 and the other end of the resistor R5 and then connected with a single chip.
7. The single chip microcomputer control circuit according to claim 1, wherein the controllable switch connected between the input end of the voltage stabilizing circuit and the power supply of the single chip microcomputer is a switching tube Q1, and the controllable switch self-locking circuit specifically comprises a diode D2, a resistor R3, a resistor R6, a zener diode ZD1, a resistor R7, a switching tube Q2 and a resistor R8; the anode of the diode D2 is connected with a POWER _ ON pin of a to-be-powered single chip microcomputer, the cathode of the diode D2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the cathode of a zener diode ZD1, one end of a resistor R7 and the gate of a switch tube Q2, the anode of the zener diode ZD1 is connected with the other end of a resistor R7 and the source of the switch tube Q2 and then grounded, the other end of a hard start switch SK2 is grounded, the drain of the switch tube Q2 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with a controllable switch activation circuit, one end of a resistor R3 and the gate of a switch tube Q1, the other end of the resistor R3 is connected with the source of the switch tube Q1 and then connected with a POWER supply terminal VCC, and the drain of.
8. The single-chip microcomputer control circuit according to claim 7, wherein the single-chip microcomputer hard start control circuit comprises a hard start switch SK 2; one end of the hard start switch SK2 is grounded, and the other end is connected with the gate of the switch tube Q2.
9. The SCM control circuit according to any one of claims 2,5,7 or 8, characterized in that the switch tube Q1 is P-channel enhancement type FET; the switching tube Q2 adopts an N-channel enhancement type field effect tube.
10. An intelligent terminal, characterized in that, the intelligent terminal comprises the single chip control circuit of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921005866.6U CN210015422U (en) | 2019-06-29 | 2019-06-29 | Single chip microcomputer control circuit and intelligent terminal applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921005866.6U CN210015422U (en) | 2019-06-29 | 2019-06-29 | Single chip microcomputer control circuit and intelligent terminal applying same |
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| CN210015422U true CN210015422U (en) | 2020-02-04 |
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| CN201921005866.6U Active CN210015422U (en) | 2019-06-29 | 2019-06-29 | Single chip microcomputer control circuit and intelligent terminal applying same |
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