CN220947579U - Dormancy awakening circuit and automobile and vehicle-mounted electronic equipment - Google Patents
Dormancy awakening circuit and automobile and vehicle-mounted electronic equipment Download PDFInfo
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- CN220947579U CN220947579U CN202322426721.6U CN202322426721U CN220947579U CN 220947579 U CN220947579 U CN 220947579U CN 202322426721 U CN202322426721 U CN 202322426721U CN 220947579 U CN220947579 U CN 220947579U
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- 230000005059 dormancy Effects 0.000 title claims abstract description 22
- 238000004146 energy storage Methods 0.000 claims abstract description 57
- 230000007958 sleep Effects 0.000 claims abstract description 39
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 35
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- 230000005669 field effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 101100366946 Arabidopsis thaliana STOP1 gene Proteins 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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Abstract
The embodiment of the application provides a dormancy wakeup circuit, an automobile and vehicle-mounted electronic equipment, and belongs to the field of automobile control. The circuit comprises: the device comprises a micro control unit, an external wake-up module and a control module; the external wake-up module is respectively and electrically connected with the micro control unit and the control module and is used for receiving an external wake-up signal from external equipment; the micro control unit is also electrically connected with the control module; the control module comprises: the device comprises a current limiting unit, an energy storage unit, a discharge unit and a switch tube; the micro control unit is used for setting an initial signal of the micro control unit into a high-resistance state before entering into dormancy so as to execute a dormancy instruction; the charge of the energy storage unit is released through the discharging unit, the voltage provided by the energy storage unit is lower than the starting voltage of the switching tube, and the switching tube is turned off, so that an external wake-up signal is input to the micro-control unit; and the micro control unit is used for receiving the external wake-up signal and entering a wake-up state. The internal state signal of the MCU of the sleep wake-up peripheral circuit can be ensured to be normal, and the reliability is improved.
Description
Technical Field
The application relates to the field of electric automobile control, in particular to a dormancy awakening circuit and automobile and vehicle-mounted electronic equipment.
Background
With the rapid development of new energy automobiles at present, more and more vehicle-mounted electronic devices are appeared, and people pay attention to energy conservation and hope that the electronic devices do not consume excessive power. The Micro Control Unit (MCU) is a basic component unit of a plurality of electronic devices, the power consumption of the MCU has an important influence on the overall power consumption of the devices, when the devices do not need to work, the devices need to enter a sleep mode to reduce the power consumption, the existing partial applications cannot guarantee the occurrence time of external wake-up signals, and the problem that the chip cannot be woken up to cause the halt possibly occurs when the MCU is woken up.
Disclosure of utility model
In order to solve the technical problems, the embodiment of the application provides a dormancy wakeup circuit, an automobile and a vehicle-mounted electronic device, wherein after external equipment sends an external wakeup signal, charges in an energy storage unit of the dormancy wakeup circuit are released through a discharge unit until voltage provided by the energy storage unit is lower than the starting voltage of a switching tube, and the external wakeup signal is input to a micro control unit after the switching tube is disconnected.
In a first aspect, an embodiment of the present application provides a sleep wake-up circuit, where the circuit includes a micro control unit, an external wake-up module, and a control module;
The external wake-up module is respectively and electrically connected with the micro control unit and the control module and is used for receiving an external wake-up signal from external equipment; the micro control unit is also electrically connected with the control module; the control module includes: the device comprises a current limiting unit, an energy storage unit, a discharge unit and a switch tube; the switching tube includes: a control end, an input end and an output end; the first end of the current limiting unit is electrically connected with the micro control unit; the second end of the current limiting unit is electrically connected with the first end of the energy storage unit, the first end of the discharging unit and the control end of the switching tube respectively; the second end of the energy storage unit, the second end of the discharge unit and the input end of the switching tube are electrically connected to a common end, and the common end is grounded; the micro control unit is used for setting an initial signal of the micro control unit into a high-resistance state before entering into dormancy so as to execute a dormancy instruction; the charge of the energy storage unit is released through the discharging unit until the voltage provided by the energy storage unit is lower than the starting voltage of the switching tube, so that the switching tube is turned off, and the external wake-up signal is input to the micro-control unit; the micro control unit is used for receiving the external wake-up signal and entering a wake-up state.
In one embodiment, the external wake module includes: a first resistor; the input end of the external wake-up module is electrically connected with the first end of the first resistor; the wake-up pin end of the external wake-up module is electrically connected with the micro control unit; and a connection point between the wake-up pin end of the external wake-up module and the second end of the first resistor is electrically connected with the input end of the switching tube.
In an embodiment, when the micro control unit works normally, the initial signal is output high level, the switch tube is turned on, and the voltage on the wake-up pin terminal of the external wake-up module is low level.
In one embodiment, the switching tube is a MOS tube; the control end of the switching tube is the grid electrode of the MOS tube; the input end of the switching tube is the source electrode of the MOS tube; the output end of the switching tube is the drain electrode of the MOS tube; the grid electrode of the MOS tube is respectively and electrically connected with the first end of the discharge unit, the first end of the energy storage unit and the second end of the current limiting unit; the source electrode of the MOS tube is electrically connected with the second end of the energy storage unit and the second end of the discharge unit respectively and is connected with the public end.
In one embodiment, the current limiting unit is a third resistor; the first end of the third resistor is the first end of the current limiting unit; the second end of the third resistor is the second end of the current limiting unit; the first end of the third resistor is electrically connected with the micro control unit; the second end of the third resistor is electrically connected with the first end of the energy storage unit, the first end of the discharge unit and the control end of the switching tube respectively.
In an embodiment, the energy storage unit is a first capacitor; a first end of the first capacitor is a first end of the energy storage unit; the second end of the first capacitor is the second end of the energy storage unit; the connection point of the first end of the first capacitor and the second end of the third resistor is electrically connected with the first end of the energy storage unit; the second end of the first capacitor is electrically connected with the second end of the discharge unit and the input end of the switching tube respectively and is connected with the common end.
In one embodiment, the discharge unit is a second resistor; the first end of the second resistor is the first end of the discharge unit; the second end of the second resistor is the second end of the discharge unit; the first end of the second resistor is electrically connected with the second end of the third resistor; the second end of the second resistor is electrically connected with the common end.
In one embodiment, the switching tube is an N-channel MOSFET or a P-channel MOSFET.
In a second aspect, an embodiment of the present application provides an in-vehicle electronic device, including the sleep wake-up circuit provided in the first aspect.
In a third aspect, an embodiment of the present application provides an automobile, including the sleep wake-up circuit provided in the first aspect and the vehicle-mounted electronic device provided in the second aspect.
Embodiments of the present utility model have the following advantages:
Before a Micro Control Unit (MCU) of a dormancy wakeup circuit enters dormancy, setting an initial signal of the micro control unit to be in a high-resistance state so as to immediately execute a dormancy instruction, releasing charges of an energy storage unit through a discharge unit until the voltage provided by the energy storage unit is lower than the starting voltage of a switching tube, turning off the switching tube, and inputting an external wakeup signal to the micro control unit; the external wake-up signal is transmitted to the micro control unit after a period of time delay after the micro control unit is dormant by time shielding the external wake-up signal at one end before and after the micro control unit is dormant, so that the effective time of the external wake-up signal is adjusted to be after the chip completely enters the dormant mode of the micro control unit, the internal state signal is ensured to be normal, and the circuit can be used as an MCU dormant wake-up peripheral circuit, and has low cost and high reliability.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are required for the embodiments will be briefly described, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application. Like elements are numbered alike in the various figures.
Fig. 1 is a schematic diagram of a sleep wake-up circuit according to an embodiment of the present application;
Fig. 2 is a schematic diagram of another structure of a sleep wake-up circuit according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application 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 application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
The terms "comprises," "comprising," "including," or any other variation thereof, are intended to cover a specific feature, number, step, operation, element, component, or combination of the foregoing, which may be used in various embodiments of the present application, and are not intended to first exclude the presence of or increase the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the application.
Example 1
The embodiment of the application provides a dormancy wakeup circuit, before a micro control unit enters dormancy, charges of a first capacitor are released through a second resistor until the voltage provided by the first capacitor is lower than the starting voltage of an MOS tube, the MOS tube is turned off, an external wakeup signal is input to the micro control unit, the process can delay dormancy of the micro control unit for a period of time, the time of the external wakeup signal reaching the micro control unit is adjusted until a chip completely enters into a dormancy mode of the micro control unit, and the internal state signal is ensured to be normal.
Since some applications cannot guarantee the occurrence time of the external wake-up signal, the MCU may not wake up normally when the sleep instruction is executed in the time. Referring to fig. 1, the present embodiment provides a sleep wakeup circuit, which includes: an external wake-up module 120, a micro control unit 110, a control module 130.
The external wake-up module 120 is electrically connected to the micro control unit 110 and the control module 130, respectively.
The micro control unit 110 is further electrically connected to the control module 130; the control module 130 includes: a current limiting unit 1304, an energy storage unit 1303, a discharge unit 1302, and a switching tube 1301; the switching tube 1301 includes: a control end, an input end and an output end; a first end of the current limiting unit 1304 is electrically connected to the micro control unit 110; the second end of the current limiting unit 1304 is electrically connected to the first end of the energy storage unit 1303, the first end of the discharging unit 1302, and the control end of the switching tube 1301, respectively; the second end of the energy storage unit 1303, the second end of the discharge unit 1302, and the input end of the switch tube 1301 are electrically connected to a common end, and the common end is grounded;
The micro control unit 110 is configured to set an initial signal of the micro control unit 110 to a high impedance state before entering sleep, so as to execute a sleep instruction; the charge of the energy storage unit 1303 is released through the discharging unit 1302 until the voltage provided by the energy storage unit 1303 is lower than the on voltage of the switching tube, so that the switching tube 1301 is turned off to input an external wake-up signal to the micro control unit 110; the micro control unit 110 is configured to receive an external wake-up signal and enter a wake-up state.
The utility model delays the turn-off of the switch tube 1301 through the discharging unit 1302, thereby adjusting the effective time of the external wake-up signal until the chip completely enters the sleep mode, ensuring the normal internal state signal, and the utility model can be used as the MCU sleep wake-up peripheral circuit, and has low cost and high reliability.
Referring to fig. 2, the external wake module 120 includes: the external wake-up module comprises an input end RXD of the external wake-up module and a wake-up pin end WKP of the external wake-up module, wherein the external wake-up module 120 is a first resistor R1, a first end of the first resistor R1 is the input end RXD of the external wake-up module, and a second end of the first resistor R1 is electrically connected with the wake-up pin end WKP; the discharge unit 1302 is a second resistor R2, a first end of the second resistor R2 is a first end of the discharge unit 1302, and a second end of the second resistor R2 is a second end of the discharge unit 1302.
The energy storage unit 1303 is a first capacitor C1, a first end of the first capacitor C1 is a first end of the energy storage unit 1303, and a second end of the first capacitor C1 is a second end of the energy storage unit 1303.
The current limiting unit 1304 is a third resistor R3, and the micro control unit 110 is capable of generating an initial signal wkp_ctl.
The first end of the first resistor R1 is electrically connected with external equipment; the second end of the first resistor R1 is electrically connected with the micro control unit 110; the connection point of the wake-up pin WKP of the external wake-up module and the second end of the first resistor is electrically connected with the source electrode of the 1301, the grid electrode of the 1301 is respectively electrically connected with the first end of the second resistor R2, the first end of the first capacitor 1303 and the second end of the third resistor 1304, the source electrode of the 1301 is respectively electrically connected with the second end of the first capacitor C1 and the second end of the second resistor R2 to a common end, and the common end is grounded; the micro control unit 110 is configured to set an initial signal of the micro control unit 110 to a high-impedance state before entering sleep, so as to execute a sleep instruction; the charge of the first capacitor 1303 is released via the second resistor R2 until the voltage provided by the first capacitor 1303 is lower than the turn-on voltage of the capacitor 1301, so that the capacitor 1301 is turned off to input the external wake-up signal to the micro control unit 110; the micro control unit 110 is configured to receive the external wake-up signal and enter a wake-up state.
It is to be noted that the micro control unit is also called a single chip Microcomputer (SINGLE CHIP microcomputers) or a single chip Microcomputer, which is to properly reduce the frequency and specification of a central processing unit (Central Process Unit; CPU), integrate peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D conversion, UART, PLC, DMA, etc., even an LCD driving circuit on a single chip to form a chip-level computer, and perform different combination control for different application occasions, and set an initial signal of the micro control unit to be in a high impedance state before entering sleep so as to execute a sleep instruction; the charge of the energy storage unit is released through the discharging unit until the voltage provided by the energy storage unit is lower than the starting voltage of the switching tube, so that the switching tube is turned off, and the process can delay the time for the external wake-up signal to reach the micro-control unit by 200us, namely, the effective time of the external wake-up signal is regulated to be completely in the sleep mode of the micro-control unit, so that the internal state signal is ensured to be normal.
When the micro control unit works normally, the initial signal wkp_ctl is output at a high level, the 1301 is turned on, and the voltage on the wake-up pin end WKP of the external wake-up module is at a low level.
It should be noted that 1301 is a Metal Oxide Semiconductor Field Effect Transistor (MOSFET), and the MOSFET in the present application may be a P-channel type (PMOS transistor) or an N-channel type (NMOS transistor), which belongs to an insulated gate field effect transistor; typically metal-oxide-semiconductor field effect transistors, or metal-insulator-semiconductors. G: gate; s: source; d: drain of drain. Source and drain of the MOS transistor can be exchanged, which are both N-type regions formed in P-type backgate. In most cases, the two regions are identical, and even the two ends are reversed, so that the performance of the device is not affected. Such devices are considered symmetrical.
The control end of the 1301 is the grid electrode of the MOS tube 1301; the input end of the 1301 is the source electrode of the MOS tube 1301; the output end of the 1301 is the drain electrode of the MOS tube 1301; the gate of the MOS transistor 1301 is electrically connected to the first end of the second resistor R2, the first end of the first capacitor C1, and the second end of the third resistor R3, respectively; the source of the MOS transistor 1301 is electrically connected to the common terminal with the second terminal of the first capacitor C1 and the second terminal of the second resistor R2, respectively.
The third resistor R3 was 1K/5%, the second resistor R2 was 10K/5%, and the first capacitor C1 was 22nF/50V.
The first end of the third resistor R3 is the first end of the current limiting unit 1304; the second end of the third resistor R3 is the second end of the current limiting unit 1304; the first end of the third resistor R3 is electrically connected to the micro control unit 110; the second end of the third resistor R3 is electrically connected to the first end of the energy storage unit C1, the first end of the discharge unit R2, and the control end of the switching tube 1301, respectively.
The first end of the first capacitor C1 is the first end of the energy storage unit 1303; a second end of the first capacitor C1 is a second end of the energy storage unit 1303; the connection point of the first end of the first capacitor C1 and the second end of the third resistor R3 is electrically connected with the first end of the energy storage unit C1; the second end of the first capacitor C1 is electrically connected to the common end with the second end of the discharge unit R2 and the input end of the switching tube 1301, respectively.
The first end of the second resistor R2 is the first end of the discharge unit 1302; the second end of the second resistor 1302 is the second end of the discharge unit 1302; the first end of the second resistor R2 is electrically connected with the second end of the third resistor R3; the second end of the second resistor R2 is electrically connected with the common end.
It should be noted that the present application is applicable to a pattern wake-up mode, such as a general CAN transceiver, and when in a low power consumption mode, the signal of the bus is fed back to the RXD port of the external wake-up module in real time.
The common practice of waking up the MCU at the present stage is to use the external wake-up pin WKUP of the MCU. The WKUP pin may wake up in STOP0, STOP1, STANDBY, and SHUTDOWN modes. In any sleep mode, the pin of the MCU may be software selected to hold the level. WKUP supports rising or falling edge wakeup. And when the rising edge is used for awakening, the pull-down resistor is connected to keep stable level, and similarly, when the falling edge is used for awakening, the pull-up resistor is needed. Since some applications cannot guarantee the occurrence time of the external wake-up signal, it is possible to perform external wake-up during the time when the sleep instruction is just performed, which may cause the micro control unit to fail to wake-up normally. According to the application, before the micro control unit enters into sleep, an initial signal of the micro control unit is set to be in a high-resistance state, then a sleep instruction is executed, the charge of the first capacitor is released through the second resistor until the voltage provided by the first capacitor is lower than the starting voltage of the MOSFET, the MOSFET is turned off, finally an external wake-up signal is input to the micro control unit, the micro control unit receives the external wake-up signal and is waken, the process can enable the micro control unit to sleep for a period of time, the time of the external wake-up signal reaching the micro control unit is adjusted until the chip completely enters into the sleep mode of the micro control unit, so that the internal state signal is ensured to be normal, and the circuit can be used as an MCU sleep wake-up peripheral circuit, so that the cost is low and the reliability is high.
Example 2
The present embodiment provides a vehicle-mounted electronic device, including the sleep wakeup circuit provided in embodiment 1, where the sleep wakeup circuit includes: the device comprises a micro control unit, an external wake-up module and a control module; the external wake-up module is respectively and electrically connected with the micro control unit and the control module and is used for receiving an external wake-up signal from external equipment; the micro control unit is also electrically connected with the control module; the control module includes: the device comprises a current limiting unit, an energy storage unit, a discharge unit and a switch tube; the switching tube includes: a control end, an input end and an output end; the first end of the current limiting unit is electrically connected with the micro control unit; the second end of the current limiting unit is electrically connected with the first end of the energy storage unit, the first end of the discharging unit and the control end of the switching tube respectively; the second end of the energy storage unit, the second end of the discharge unit and the input end of the switching tube are electrically connected to a common end, and the common end is grounded; the micro control unit is used for setting an initial signal of the micro control unit into a high-resistance state before entering into dormancy so as to execute a dormancy instruction; the charge of the energy storage unit is released through the discharging unit until the voltage provided by the energy storage unit is lower than the starting voltage of the switching tube, so that the switching tube is turned off, and the external wake-up signal is input to the micro-control unit; the micro control unit is used for receiving the external wake-up signal and entering a wake-up state.
In one embodiment, the external wake module includes: a first resistor;
The input end of the external wake-up module is electrically connected with the first end of the first resistor;
The wake-up pin end of the external wake-up module is electrically connected with the micro control unit;
And a connection point between the wake-up pin end of the external wake-up module and the second end of the first resistor is electrically connected with the input end of the switching tube.
In an embodiment, when the micro control unit works normally, the initial signal is output high level, the switch tube is turned on, and the voltage on the wake-up pin terminal of the external wake-up module is low level.
In one embodiment, the switching tube is a MOS tube; the control end of the switching tube is the grid electrode of the MOS tube; the input end of the switching tube is the source electrode of the MOS tube; the output end of the switching tube is the drain electrode of the MOS tube; the grid electrode of the MOS tube is respectively and electrically connected with the first end of the discharge unit, the first end of the energy storage unit and the second end of the current limiting unit; the source electrode of the MOS tube is electrically connected with the second end of the energy storage unit and the second end of the discharge unit respectively and is connected with the public end.
In one embodiment, the current limiting unit is a third resistor; the first end of the third resistor is the first end of the current limiting unit; the second end of the third resistor is the second end of the current limiting unit; the first end of the third resistor is electrically connected with the micro control unit; the second end of the third resistor is electrically connected with the first end of the energy storage unit, the first end of the discharge unit and the control end of the switching tube respectively.
In an embodiment, the energy storage unit is a first capacitor; a first end of the first capacitor is a first end of the energy storage unit; the second end of the first capacitor is the second end of the energy storage unit; the connection point of the first end of the first capacitor and the second end of the third resistor is electrically connected with the first end of the energy storage unit; the second end of the first capacitor is electrically connected with the second end of the discharge unit and the input end of the switching tube respectively and is connected with the common end.
In one embodiment, the discharge unit is a second resistor; the first end of the second resistor is the first end of the discharge unit; the second end of the second resistor is the second end of the discharge unit; the first end of the second resistor is electrically connected with the second end of the third resistor; the second end of the second resistor is electrically connected with the common end.
In one embodiment, the switching tube is an N-channel MOSFET or a P-channel MOSFET.
The automobile provided in this embodiment may implement the sleep wake-up circuit provided in embodiment 1, and in order to avoid repetition, details are not repeated here.
Example 3
In addition, the embodiment of the application provides an automobile, which comprises the dormancy wakeup circuit provided in the embodiment 1 and the vehicle-mounted electronic equipment provided in the embodiment 2.
The automobile provided in this embodiment may implement the sleep wake-up circuit provided in embodiment 1, and in order to avoid repetition, details are not repeated here.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. A sleep wakeup circuit, the sleep wakeup circuit comprising: the device comprises a micro control unit, an external wake-up module and a control module;
The external wake-up module is respectively and electrically connected with the micro control unit and the control module and is used for receiving an external wake-up signal from external equipment;
the micro control unit is also electrically connected with the control module;
the control module includes: the device comprises a current limiting unit, an energy storage unit, a discharge unit and a switch tube;
The switching tube includes: a control end, an input end and an output end;
The first end of the current limiting unit is electrically connected with the micro control unit;
The second end of the current limiting unit is electrically connected with the first end of the energy storage unit, the first end of the discharging unit and the control end of the switching tube respectively;
the second end of the energy storage unit, the second end of the discharge unit and the input end of the switching tube are electrically connected to a common end, and the common end is grounded;
The micro control unit is used for setting an initial signal of the micro control unit into a high-resistance state before entering into dormancy so as to execute a dormancy instruction;
The charge of the energy storage unit is released through the discharging unit until the voltage provided by the energy storage unit is lower than the starting voltage of the switching tube, so that the switching tube is turned off, and the external wake-up signal is input to the micro-control unit;
the micro control unit is used for receiving the external wake-up signal and entering a wake-up state.
2. The sleep wake-up circuit of claim 1, wherein the external wake-up module comprises: a first resistor;
The input end of the external wake-up module is electrically connected with the first end of the first resistor;
The wake-up pin end of the external wake-up module is electrically connected with the micro control unit;
And a connection point between the wake-up pin end of the external wake-up module and the second end of the first resistor is electrically connected with the input end of the switching tube.
3. The sleep-wake-up circuit of claim 2, wherein the initial signal is an output high level, the switching tube is turned on, and a voltage on a wake-up pin terminal of the external wake-up module is a low level when the micro-control unit is operating normally.
4. The sleep wake-up circuit of claim 1, wherein the switching tube is a MOS tube;
the control end of the switching tube is the grid electrode of the MOS tube;
the input end of the switching tube is the source electrode of the MOS tube;
The output end of the switching tube is the drain electrode of the MOS tube;
The grid electrode of the MOS tube is respectively and electrically connected with the first end of the discharge unit, the first end of the energy storage unit and the second end of the current limiting unit;
The source electrode of the MOS tube is electrically connected with the second end of the energy storage unit and the second end of the discharge unit respectively and is connected with the public end.
5. The sleep wake-up circuit according to claim 1, wherein the current limiting unit is a third resistor;
the first end of the third resistor is the first end of the current limiting unit;
The second end of the third resistor is the second end of the current limiting unit;
The first end of the third resistor is electrically connected with the micro control unit;
the second end of the third resistor is electrically connected with the first end of the energy storage unit, the first end of the discharge unit and the control end of the switching tube respectively.
6. The sleep wake-up circuit of claim 5, wherein the energy storage unit is a first capacitor;
A first end of the first capacitor is a first end of the energy storage unit;
The second end of the first capacitor is the second end of the energy storage unit;
The connection point of the first end of the first capacitor and the second end of the third resistor is electrically connected with the first end of the energy storage unit;
the second end of the first capacitor is electrically connected with the second end of the discharge unit and the input end of the switching tube respectively and is connected with the common end.
7. The sleep wake-up circuit as claimed in claim 6, characterized in that, said discharging unit is a second resistor;
the first end of the second resistor is the first end of the discharge unit;
The second end of the second resistor is the second end of the discharge unit;
the first end of the second resistor is electrically connected with the second end of the third resistor;
the second end of the second resistor is electrically connected with the common end.
8. The sleep wake-up circuit of claim 1, wherein the switching tube is an N-channel MOSFET or a P-channel MOSFET.
9. An in-vehicle electronic device comprising the sleep wake-up circuit of any one of claims 1 to 8.
10. An automobile comprising the sleep wake-up circuit of any one of claims 1 to 8 or the in-vehicle electronic device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322426721.6U CN220947579U (en) | 2023-09-06 | 2023-09-06 | Dormancy awakening circuit and automobile and vehicle-mounted electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322426721.6U CN220947579U (en) | 2023-09-06 | 2023-09-06 | Dormancy awakening circuit and automobile and vehicle-mounted electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220947579U true CN220947579U (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322426721.6U Active CN220947579U (en) | 2023-09-06 | 2023-09-06 | Dormancy awakening circuit and automobile and vehicle-mounted electronic equipment |
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| CN (1) | CN220947579U (en) |
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2023
- 2023-09-06 CN CN202322426721.6U patent/CN220947579U/en active Active
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