CN112787645B - Reset control circuit and vehicle - Google Patents
Reset control circuit and vehicle Download PDFInfo
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- CN112787645B CN112787645B CN202110045013.0A CN202110045013A CN112787645B CN 112787645 B CN112787645 B CN 112787645B CN 202110045013 A CN202110045013 A CN 202110045013A CN 112787645 B CN112787645 B CN 112787645B
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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 cutting control signal output by the main control module through the cutting control port, the reset control circuit cuts off 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. The invention can independently reset the special functional module when the special functional module needs to be reset.
Description
Technical Field
The present invention relates to the field of chip design technologies, and in particular, to a reset control circuit and a vehicle.
Background
Along with the continuous progress of technological development, automobile electronic control occupies an increasingly important position in a whole automobile system, so that a chip reset circuit for ensuring timely reset of a controller is indispensable.
The current reset control circuit is a special function chip reset main control MCU, after receiving a reset signal, the reset control circuit resets the chip, and the chip loads configuration information according to the state of the reset signal. The main control MCU resets the special function chip because the reset pin of the special function chip is the reset pin of the main control MCU, and the main control MCU resets the special function chip, thereby causing the functional failure of the product, so the prior main control MCU can not independently reset the special function chip.
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 resetting the special function module, and solve the problem that the main control module cannot reset the special function module independently.
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 cutting control signal output by the main control module through the cutting control port, the reset control circuit cuts off 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: the control end of the first switching element is connected with the reset control port, the first passage end of the first switching element is connected with the second reset port, and the second passage 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 cutting unit is connected with the cutting control port, the first passage end of the reset cutting unit is connected with the first reset port, and the second passage end of the reset cutting 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 cutting unit includes: the first path end of the second switching element is connected with the first reset port, and the second path end of the second switching element is connected with the second reset port; and the first passage end of the third switching element is connected with the control end of the second switching element, the control end of the third switching element is connected with the cut-off control port, and the second passage end of the third switching element is grounded.
In an embodiment, the reset cutting 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 path 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 an embodiment, the reset cutting unit further includes: and one end of the fifth resistor is connected with the control end of the second switching element, and the other end of the fifth resistor is connected with the second path end of the second switching element.
In an embodiment, the reset cutting 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 an embodiment, the reset control circuit further includes: 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 switching element.
In an embodiment, the reset control circuit further includes: and one end of the eighth resistor is connected with the control end of the first switching element, and the other end of the eighth resistor is connected with the second path end of the first switching element.
In an embodiment, the reset control circuit further includes: 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, 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, when the reset trigger signal is received through the reset control port, 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 diagram of a reset control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a reset control circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a reset cut-off unit in a reset control circuit according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 invention comprises a reset control circuit 11, a main control module 12 and a special function module 13.
Wherein the reset control circuit 11 is connected with the main control module 12 and the special function module 13. The main control module 12 cuts off a reset signal line between the main control module 12 and the special function module 13 through the reset control circuit 11 to prevent the main control module 12 from resetting itself when resetting the special function module 13, thereby realizing that the main control module 12 can reset the special function module 13 alone when the special function module 13 needs to be reset.
Specifically, the main control module 12 includes a reset control port 121, a cut-off control port 122, and a first reset port 123. The dedicated functional module 13 comprises 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 special function module 13 through the second reset port 131, so as to control the special 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 cutting 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 path terminal T12 of the first switching element is connected to the second reset port 131, and the second path 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 lockout unit 21 is connected to the lockout control port 122, the first pass terminal 212 of the reset lockout unit 21 is connected to the first reset port 123, and the second pass terminal 213 of the reset lockout 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 cutting unit 21 includes: a second switching element T2, a third switching element T3. In an embodiment, the reset cutting unit 21 further includes: third resistor R3, fourth resistor R4, fifth resistor R5, and sixth resistor R6. The first pass terminal T22 of the second switching element T2 is connected to the first reset port 123, and the second pass 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-off control port 122, and the second path T33 of the third switching element T3 is grounded. 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 functional 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 supply the power supply voltage to the dedicated functional module 13 while supplying the pull-up voltage to the second reset port 131 of the dedicated functional module 13. The second reference power VCC2 may provide a supply voltage for the main control module 12 while providing a pull-up voltage for the first reset port 123 of the main control module 12.
In an embodiment, the first reference power VCC1 and the second reference power VCC2 may be the same power supply, or may be different power supplies, and in addition, the 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, NOMS transistors, or the like. The main control module 12 may be, but is not limited to, a micro control unit (Microcontroller Unit; MCU). The MCU 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), USB, A/D conversion, UART, PLC, DMA and the like, and even LCD driving circuits on a single chip to form a chip-level computer for different combination control for different application occasions. The special function module 13 may be, but not limited to, a special chip for an automobile body stabilization system or an automobile anti-lock braking system, the model number being SC900719CAF, or a chip having 12 valves, including 4 digital valve controls and 8 current valve controls, a high-side driving protection function of a valve control circuit, an interface circuit function supporting three wheel speed sensor types, a function with a freewheel loop having a frequency of 16Khz PWM motor driving, a function supporting an MCU core, an I/O port, an external 5V power supply, a function supporting a two-way high-speed CAN function, a watchdog function supporting a 32-bit SPI interface, and the like.
Specifically, in one embodiment, when receiving the low level output from the main control module 12 through the cut control port 122, the reset cut unit 21 cuts off the first reset port 123 and the second reset port 131, and the second reset port 123 outputs the high potential, so that the main control module 12 does not perform the 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 an 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. One end of the eighth resistor R8 is connected to the control terminal T11 of the first switching element T1, and the other end is connected to the second path terminal T13 of the first switching element T1. One end of the ninth resistor R9 is connected to the third reference power VCC3, and the other end is 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 resetting the special function module, so that when the special function module has a fault and needs to be reset, the main control module can independently reset the special function module.
The embodiment of the invention also provides a vehicle, which comprises the reset control circuit. Since the embodiments of the reset control circuit portion correspond to the embodiments of the vehicle portion, the embodiments of the vehicle portion are described with reference to the embodiments of the reset control circuit portion, and are not described herein.
According to the reset control circuit and the vehicle, when the reset control circuit 11 receives the cut-off control signal output by the main control module 12 through the cut-off control port 122, the first reset port 123 and the second reset port 131 are disconnected, when the reset trigger signal is received through the reset control port 121, the non-reset control signal is fed back to the main control module 12 through the first reset port 123, and the reset control signal is output to the special function module 13 through the second reset port 131, so that the special function module 13 is controlled to reset, and the main control module 12 is controlled not to reset, so that when the special function module 13 has a fault and needs to reset, the main control module 12 can independently reset the special function module 13.
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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It will be appreciated by those of ordinary skill in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or a program implemented by a program to instruct related hardware may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The present invention is not limited to the above embodiments, but is capable of modification and variation in all aspects, including those of ordinary skill in the art, without departing from the spirit and scope of the present invention.
Claims (9)
1. The reset control circuit is characterized by being connected with the main control module and the 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;
the reset control circuit disconnects 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, 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 so as to control the special function module to reset and control the main control module not to reset;
the reset control circuit further includes:
the control end of the first switching element is connected with the reset control port, the first passage end of the first switching element is connected with the second reset port, and the second passage 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 cutting unit is connected with the cutting control port, the first passage end of the reset cutting unit is connected with the first reset port, and the second passage end of the reset cutting 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.
2. The reset control circuit of claim 1, wherein the reset cut-off unit includes:
the first path end of the second switching element is connected with the first reset port, and the second path end of the second switching element is connected with the second reset port;
and the first passage end of the third switching element is connected with the control end of the second switching element, the control end of the third switching element is connected with the cut-off control port, and the second passage end of the third switching element is grounded.
3. The reset control circuit of claim 2, wherein the reset cut-off 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 path 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.
4. The reset control circuit of claim 3, wherein the reset cut-off unit further comprises:
and one end of the fifth resistor is connected with the control end of the second switching element, and the other end of the fifth resistor is connected with the second path end of the second switching element.
5. The reset control circuit of claim 3, wherein the reset cut-off 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.
6. The reset control circuit of any one of claims 1-5, further comprising:
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 switching element.
7. The reset control circuit of claim 6, wherein the reset control circuit further comprises:
and one end of the eighth resistor is connected with the control end of the first switching element, and the other end of the eighth resistor is connected with the second path end of the first switching element.
8. The reset control circuit of claim 3, 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.
9. A vehicle comprising the reset control circuit of any one of claims 1 to 8.
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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| Publication Number | Publication Date |
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| CN112787645A CN112787645A (en) | 2021-05-11 |
| CN112787645B true CN112787645B (en) | 2023-05-02 |
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| CN202110045013.0A Active CN112787645B (en) | 2021-01-13 | 2021-01-13 | Reset control circuit and vehicle |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2998804B2 (en) * | 1990-01-26 | 2000-01-17 | 株式会社東芝 | Multi-microprocessor system |
| CN100396127C (en) * | 2005-07-21 | 2008-06-18 | 上海华为技术有限公司 | Method and system for resetting radio zoom-out module |
| CN201114149Y (en) * | 2007-03-23 | 2008-09-10 | 北京网新易尚科技有限公司 | Ethernet network switch capable of clearing away forwarding table within 50 millisecond |
| CN102508533B (en) * | 2011-09-21 | 2014-07-09 | 迈普通信技术股份有限公司 | Reset control device and method |
| CN104142726B (en) * | 2013-05-09 | 2020-04-14 | 中国科学院微电子研究所 | Chip reset protection method and chip |
| CN105573209A (en) * | 2015-12-30 | 2016-05-11 | 惠州市德赛西威汽车电子股份有限公司 | Function module monitoring and resetting method in vehicle electronic system |
| CN109709963B (en) * | 2018-12-29 | 2022-05-13 | 阿波罗智能技术(北京)有限公司 | Unmanned controller and unmanned vehicle |
| CN209402489U (en) * | 2019-01-25 | 2019-09-17 | 深圳市拓普泰克电子有限公司 | Reset circuit and control system |
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