CN112787645A - Reset control circuit and vehicle - Google Patents
Reset control circuit and vehicle Download PDFInfo
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- CN112787645A CN112787645A CN202110045013.0A CN202110045013A CN112787645A CN 112787645 A CN112787645 A CN 112787645A CN 202110045013 A CN202110045013 A CN 202110045013A CN 112787645 A CN112787645 A CN 112787645A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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Abstract
The invention provides a reset control circuit, which is connected with a main control module and a special function module; the main control module comprises a reset control port, a cut-off control port and a first reset port; the special function module comprises a second reset port; the reset control circuit is respectively connected with the reset control port, the cut-off control port, the first reset port and the second reset port; when receiving a cut-off control signal output by the main control module through the cut-off control port, the reset control circuit disconnects the first reset port and the second reset port, feeds back a non-reset control signal to the main control module through the first reset port when receiving a reset trigger signal through the reset control port, and outputs a reset control signal to the special function module through the second reset port to control the special function module to reset and control the main control module not to reset. The invention can independently reset the special functional module when the special functional module needs to be reset.
Description
Technical Field
The invention relates to the technical field of chip design, in particular to a reset control circuit and a vehicle.
Background
Along with the continuous progress of science and technology development, automobile electronic control occupies more and more important position in whole car system, consequently, the chip reset circuit that guarantees that the controller resets in time is indispensable.
The current reset control circuit is a special functional chip reset master control MCU, the reset control circuit resets the chip after receiving a reset signal, and the chip loads configuration information according to the state of the reset signal. And the special function chip for resetting the main control MCU is characterized in that the reset pin of the special function chip is the reset pin of the main control MCU, and the main control MCU can reset the special function chip when the special function chip is reset, so that the function of a product is invalid, and the existing main control MCU cannot reset the special function chip independently.
Disclosure of Invention
The invention aims to provide a reset control circuit and a vehicle, which can cut off a reset signal line between a main control module and a special function module, prevent the main control module from resetting itself when the special function module is reset, and solve the problem that the main control module cannot independently reset the special function module.
The embodiment of the invention provides a reset control circuit, which is connected with a main control module and a special function module; the main control module comprises a reset control port, a cut-off control port and a first reset port; the special function module comprises a second reset port; the reset control circuit is respectively connected with the reset control port, the cut-off control port, the first reset port and the second reset port; when receiving a cut-off control signal output by the main control module through the cut-off control port, the reset control circuit disconnects the first reset port and the second reset port, and when receiving a reset trigger signal through the reset control port, feeds back a non-reset control signal to the main control module through the first reset port, and outputs a reset control signal to the special function module through the second reset port so as to control the special function module to reset and control the main control module not to reset.
In one embodiment, the reset control circuit includes: a control end of the first switching element is connected with the reset control port, a first path end of the first switching element is connected with the second reset port, and a second path end of the first switching element is grounded; one end of the first resistor is connected with a first reference power supply, and the other end of the first resistor is connected with the second reset port; the control end of the reset cut-off unit is connected with the cut-off control port, the first path end of the reset cut-off unit is connected with the first reset port, and the second path end of the reset cut-off unit is connected with the second reset port; and one end of the second resistor is connected with a second reference power supply, and the other end of the second resistor is connected with the first reset port.
In one embodiment, the reset cut-off unit includes: a second switching element, a first path end of which is connected to the first reset port, and a second path end of which is connected to the second reset port; and a first pass end of the third switching element is connected with a control end of the second switching element, a control end of the third switching element is connected with the cut-off control port, and a second pass end of the third switching element is grounded.
In one embodiment, the reset lockout unit further includes: one end of the third resistor is connected with the control end of the second switching element, and the other end of the third resistor is connected with the first pass end of the third switching element; and one end of the fourth resistor is connected with the cut-off control port, and the other end of the fourth resistor is connected with the control end of the third switching element.
In one embodiment, the reset lockout unit further includes: and one end of the fifth resistor is connected with the control end of the second switch element, and the other end of the fifth resistor is connected with the second path end of the second switch element.
In one embodiment, the reset lockout unit further includes: and one end of the sixth resistor is connected with the control end of the third switching element, and the other end of the sixth resistor is connected with the second path end of the third switching element.
In one embodiment, the reset control circuit further comprises: and one end of the seventh resistor is connected with the reset control port, and the other end of the seventh resistor is connected with the control end of the first switch element.
In one embodiment, the reset control circuit further comprises: and one end of the eighth resistor is connected with the control end of the first switch element, and the other end of the eighth resistor is connected with the second path end of the first switch element.
In one embodiment, the reset control circuit further comprises: and one end of the ninth resistor is connected with a third reference power supply, and the other end of the ninth resistor is connected with the cut-off control port.
The embodiment of the invention also provides a vehicle which comprises the reset control circuit.
According to the reset control circuit and the vehicle provided by the invention, when the reset control circuit receives the cut-off control signal output by the main control module through the cut-off control port, the first reset port and the second reset port are disconnected, and when the reset control port receives the reset trigger signal, the non-reset control signal is fed back to the main control module through the first reset port, and the reset control signal is output to the special function module through the second reset port, so that the special function module is controlled to reset, and the main control module is controlled not to reset, so that when the special function module has a fault and needs to reset, the main control module can independently reset the special function module.
Drawings
Fig. 1 is a schematic structural diagram of a reset control system according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a reset control circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a reset shutdown unit in the reset control circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a reset control system according to an embodiment of the present invention. As shown in fig. 1, the reset control system provided by the present invention includes a reset control circuit 11, a main control module 12, and a dedicated function module 13.
The reset control circuit 11 is connected to the main control module 12 and the dedicated function module 13. The main control module 12 cuts off the reset signal line between the main control module 12 and the dedicated function module 13 through the reset control circuit 11 to prevent the main control module 12 from resetting itself when the dedicated function module 13 is reset, thereby realizing that the main control module 12 can reset the dedicated function module 13 alone when the dedicated function module 13 needs to be reset.
Specifically, the main control module 12 includes a reset control port 121, a shut-off control port 122, and a first reset port 123. The dedicated function module 13 includes a second reset port 131. The reset control circuit 11 is connected to the reset control port 121, the cut-off control port 122, the first reset port 123, and the second reset port 131, respectively.
When receiving the cut-off control signal output by the main control module 12 through the cut-off control port 122, the reset control circuit 11 disconnects the first reset port 123 and the second reset port 131, and when receiving the reset trigger signal through the reset control port 121, feeds back a non-reset control signal to the main control module 12 through the first reset port 123, and outputs a reset control signal to the dedicated function module 13 through the second reset port 131, so as to control the dedicated function module 13 to reset and control the main control module 12 not to reset.
In one embodiment, as shown in fig. 2, the reset control circuit 11 includes a first switching element T1, a first resistor R1, a reset cut-off unit 21, and a second resistor R2. The control terminal T11 of the first switching element T1 is connected to the reset control port 121, the first pass terminal T12 of the first switching element is connected to the second reset port 131, and the second pass terminal T13 of the first switching element T1 is grounded. One end of the first resistor R1 is connected to the first reference power VCC1, and the other end of the first resistor R1 is connected to the second reset port 131. The control terminal 211 of the reset cut-off unit 21 is connected to the cut-off control port 122, the first path terminal 212 of the reset cut-off unit 21 is connected to the first reset port 123, and the second path terminal 213 of the reset cut-off unit 21 is connected to the second reset port 131. One end of the second resistor R2 is connected to the second reference power VCC2, and the other end of the second resistor R2 is connected to the first reset port 123. As shown in fig. 2 and 3, the reset cut-off unit 21 includes: a second switching element T2, and a third switching element T3. In one embodiment, the reset cut-off unit 21 further includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6. The first path terminal T22 of the second switching element T2 is connected to the first reset port 123, and the second path terminal T23 of the second switching element T2 is connected to the second reset port 131. The first path terminal T32 of the third switching element T3 is connected to the control terminal T21 of the second switching element T2, the control terminal T31 of the third switching element T3 is connected to the cut control port 122, and the second path terminal T33 of the third switching element T3 is connected to ground. One end of the third resistor R3 is connected to the control terminal T21 of the second switching element, and the other end is connected to the first path terminal T32 of the third switching element T3. One end of the fourth resistor R4 is connected to the cut-off control port 122, and the other end is connected to the control terminal T31 of the third switching element T3. One end of the fifth resistor R5 is connected to the control terminal T21 of the second switching element T2, and the other end is connected to the second path terminal T23 of the second switching element T2. One end of the sixth resistor R6 is connected to the control terminal T31 of the third switching element T3, and the other end is connected to the second path terminal T33 of the third switching element T3.
Specifically, in the above example, the first resistor R1 is a pull-up resistor of the second reset port 131 of the dedicated function module 13, and the second resistor R2 is a pull-up resistor of the first reset port 123 of the main control module 12. The first reference power VCC1 may provide a supply voltage for the dedicated function module 13 while providing a pull-up voltage for the second reset port 131 of the dedicated function module 13. The second reference power source VCC2 may provide a supply voltage to the host control module 12 while providing a pull-up voltage to the first reset port 123 of the host control module 12.
In an embodiment, the first reference power VCC1 and the second reference power VCC2 may be the same power supply or different power supplies, and output voltages of the first reference power VCC1 and the second reference power VCC2 may be the same. In the above example, the first switching element T1, the second switching element 21, and the third switching element T2 may be, but not limited to, transistors, and may also be NOMS transistors. The master control module 12 may be, but is not limited to, a Microcontroller Unit (MCU). The MCU is a computer with a chip level formed by properly reducing the frequency and specification of a Central Processing Unit (CPU) and integrating peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D converter, a UART, a PLC, a DMA, etc., and even an LCD driving circuit on a single chip, and is used for different combination control in different applications. The special function module 13 may be, but not limited to, a special chip with a model number SC900719CAF for an automobile body stabilization system or an automobile anti-lock system, or a chip with functions of controlling 12 valves, including 4 digital valves and 8 current valves, a high-side driving protection function of a valve control circuit, an interface circuit function supporting three types of wheel speed sensors, a function of driving a PWM motor with a freewheeling circuit with a frequency of 16Khz, a function supporting MCU core, I/O ports, external 5V power supply, a two-way high-speed CAN function, a watchdog function supporting a 32-bit SPI interface, and the like.
Specifically, in one embodiment, when the reset control circuit 11 receives a low level output from the main control module 12 through the off control port 122, the reset off unit 21 turns off the first reset port 123 from the second reset port 131, and the second reset port 123 outputs a high potential, so that the main control module 12 does not reset. When the reset control circuit 11 receives a high level through the reset control port 121, the voltage of the control terminal T11 of the first switching element T1 rises until the second reset port 131 outputs a low level after the first switching element T1 is turned on, so that the dedicated function module 13 is reset.
In one embodiment, the reset control circuit 11 further includes a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. One end of the seventh resistor R7 is connected to the reset control port 121, and the other end is connected to the control terminal T11 of the first switching element T1. The eighth resistor R8 has one end connected to the control terminal T11 of the first switching element T1 and the other end connected to the second path terminal T13 of the first switching element T1. The ninth resistor R9 has one terminal connected to the third reference power source VCC3 and the other terminal connected to the cut-off control port 122.
The reset control circuit provided by the embodiment can cut off the reset signal line between the main control module and the special function module, and prevent the main control module from resetting itself when the special function module is reset, so that the main control module can independently reset the special function module when the special function module has a fault and needs to be reset.
The embodiment of the invention also provides a vehicle which comprises the reset control circuit. Since the embodiment of the reset control circuit portion corresponds to the embodiment of the vehicle portion, please refer to the above embodiment of the reset control circuit portion for describing the embodiment of the vehicle portion, and no further description is provided herein.
The reset control circuit and the vehicle provided by the embodiment of the application can disconnect the first reset port 123 and the second reset port 131 when receiving the cut-off control signal output by the main control module 12 through the cut-off control port 122 through the reset control circuit 11, and when receiving the reset trigger signal through the reset control port 121, feed back the non-reset control signal to the main control module 12 through the first reset port 123, and output the reset control signal to the special function module 13 through the second reset port 131, reset the special function module 13 in order to control, and control the main control module 12 not to reset, thereby realizing that when the special function module 13 has a fault and needs to reset, the main control module 12 can reset the special function module 13 alone.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, and a program that can be implemented by the hardware and can be instructed by the program to be executed by the relevant hardware may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic or optical disk, and the like.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A reset control circuit is characterized in that the reset control circuit is connected with a main control module and a special function module;
the main control module comprises a reset control port, a cut-off control port and a first reset port;
the special function module comprises a second reset port;
the reset control circuit is respectively connected with the reset control port, the cut-off control port, the first reset port and the second reset port;
when receiving a cut-off control signal output by the main control module through the cut-off control port, the reset control circuit disconnects the first reset port and the second reset port, and when receiving a reset trigger signal through the reset control port, feeds back a non-reset control signal to the main control module through the first reset port, and outputs a reset control signal to the special function module through the second reset port so as to control the special function module to reset and control the main control module not to reset.
2. The reset control circuit of claim 1, wherein the reset control circuit comprises:
a control end of the first switching element is connected with the reset control port, a first path end of the first switching element is connected with the second reset port, and a second path end of the first switching element is grounded;
one end of the first resistor is connected with a first reference power supply, and the other end of the first resistor is connected with the second reset port;
the control end of the reset cut-off unit is connected with the cut-off control port, the first path end of the reset cut-off unit is connected with the first reset port, and the second path end of the reset cut-off unit is connected with the second reset port;
and one end of the second resistor is connected with a second reference power supply, and the other end of the second resistor is connected with the first reset port.
3. The reset control circuit according to claim 2, wherein the reset cutoff unit includes:
a second switching element, a first path end of which is connected to the first reset port, and a second path end of which is connected to the second reset port;
and a first pass end of the third switching element is connected with a control end of the second switching element, a control end of the third switching element is connected with the cut-off control port, and a second pass end of the third switching element is grounded.
4. The reset control circuit according to claim 3, wherein the reset cutoff unit further comprises:
one end of the third resistor is connected with the control end of the second switching element, and the other end of the third resistor is connected with the first pass end of the third switching element;
and one end of the fourth resistor is connected with the cut-off control port, and the other end of the fourth resistor is connected with the control end of the third switching element.
5. The reset control circuit according to claim 4, wherein the reset cutoff unit further comprises:
and one end of the fifth resistor is connected with the control end of the second switch element, and the other end of the fifth resistor is connected with the second path end of the second switch element.
6. The reset control circuit according to claim 4, wherein the reset cutoff unit further comprises:
and one end of the sixth resistor is connected with the control end of the third switching element, and the other end of the sixth resistor is connected with the second path end of the third switching element.
7. The reset control circuit according to any one of claims 2 to 6, wherein the reset control circuit further comprises:
and one end of the seventh resistor is connected with the reset control port, and the other end of the seventh resistor is connected with the control end of the first switch element.
8. The reset control circuit of claim 7, wherein the reset control circuit further comprises:
and one end of the eighth resistor is connected with the control end of the first switch element, and the other end of the eighth resistor is connected with the second path end of the first switch element.
9. The reset control circuit of claim 4, wherein the reset control circuit further comprises:
and one end of the ninth resistor is connected with a third reference power supply, and the other end of the ninth resistor is connected with the cut-off control port.
10. A vehicle characterized by comprising the reset control circuit of any one of 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045013.0A CN112787645B (en) | 2021-01-13 | 2021-01-13 | Reset control circuit and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045013.0A CN112787645B (en) | 2021-01-13 | 2021-01-13 | Reset control circuit and vehicle |
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| CN112787645A true CN112787645A (en) | 2021-05-11 |
| CN112787645B CN112787645B (en) | 2023-05-02 |
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