CN113721744A - Mainboard and signal connection system thereof - Google Patents
Mainboard and signal connection system thereof Download PDFInfo
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- CN113721744A CN113721744A CN202110858066.4A CN202110858066A CN113721744A CN 113721744 A CN113721744 A CN 113721744A CN 202110858066 A CN202110858066 A CN 202110858066A CN 113721744 A CN113721744 A CN 113721744A
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- control switch
- signal connection
- power supply
- connection system
- processor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/32—Monitoring with visual or acoustical indication of the functioning of the machine
- G06F11/324—Display of status information
- G06F11/327—Alarm or error message display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/61—Installation
- G06F8/63—Image based installation; Cloning; Build to order
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Power Engineering (AREA)
- Quality & Reliability (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
本发明公开了一种信号连接系统，考虑到一旦将烧录器的接地端连接至JTAG连接器的供电端子便可能对烧录器以及电源造成损坏，因此本申请中通过在回路中设置第一熔断装置，以便在烧录器的接地端连接至JTAG连接器的供电端子时自动实现断路，在此基础上，本申请还额外通过处理器在监测到电源的电压异常时控制第一控制开关断开从而实现断路控制，防止第一熔断装置未正常断开，由于本申请中具有双重断路保护机制，大大提高了断路保护的可靠性，从而最大程度上防止接线错误对对烧录器乃至电源造成损害，降低了维修成本且提高了工作效率。本发明还公开了一种主板，具有如上信号连接系统相同的有益效果。
The invention discloses a signal connection system. Considering that once the ground terminal of the programmer is connected to the power supply terminal of the JTAG connector, the programmer and the power supply may be damaged. The fuse device is used to automatically realize the circuit breaker when the ground end of the programmer is connected to the power supply terminal of the JTAG connector. On this basis, the present application additionally controls the first control switch to cut off the first control switch when the abnormal voltage of the power supply is monitored by the processor. Open to realize open circuit control and prevent the first fuse device from being disconnected normally. Since the application has a double circuit break protection mechanism, the reliability of circuit break protection is greatly improved, thereby preventing wiring errors to the greatest extent. damage, reduce maintenance costs and improve work efficiency. The invention also discloses a mainboard, which has the same beneficial effects as the above signal connection system.
Description
Technical Field
The invention relates to the field of signal connection, in particular to a signal connection system and a mainboard.
Background
In the using process of a chip (for example, a Complex Programmable Logic Device (CPLD)), due to reasons such as program update, an internal program may often need to be burned, and a burner is inevitably used for program burning, but a mature signal connection system is lacking in the prior art to help the burner and a chip to be burned to perform signal connection, and once a worker connects a cable incorrectly, the burner and even the chip to be burned may be damaged, so that the maintenance cost is increased, and the working efficiency is poor.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a signal connection system which has a double open-circuit protection mechanism and greatly improves the reliability of open-circuit protection, thereby preventing a connection error from damaging a burner and even a power supply to the greatest extent, reducing the maintenance cost and improving the working efficiency; another objective of the present invention is to provide a motherboard including the signal connection system, which has a dual open-circuit protection mechanism, so as to greatly improve the reliability of open-circuit protection, thereby preventing the damage of the connection error to the recorder and even the power supply to the greatest extent, reducing the maintenance cost and improving the working efficiency.
In order to solve the technical problem, the invention provides a signal connection system, which comprises a joint test group (JTAG) connector, a power supply, a first protection circuit and a processor, wherein the first protection circuit is formed by connecting a first fusing device and a first control switch in series;
the output end of the power supply is respectively connected with one end of the first protection circuit and the first monitoring end of the processor, the other end of the first protection circuit is connected with the first end of the power supply terminal of the JTAG connector, the second end of the power supply terminal of the JTAG connector is used for being connected with the power supply end of the burner, the first end of the signal terminal of the JTAG connector is connected with the chip to be burned, and the second end of the signal terminal of the JTAG connector is used for being connected with the signal output end of the burner;
the JTAG connector is used for realizing JTAG signal connection between the chip to be burned and the burner through the JTAG connector;
the processor is connected with the first control switch and used for controlling the first control switch to be switched off when the voltage of the power supply is monitored to be abnormal through the first monitoring end;
the first fusing device is used for forming an open circuit when the current value of the current flowing through the first fusing device is larger than a preset threshold value;
wherein the default state of the first control switch is a closed state.
Preferably, the signal connection system further comprises a second protection circuit formed by connecting a second fusing device and a second control switch in series;
the first end of the grounding terminal of the JTAG connector is connected with one end of the second protection circuit, the other end of the second protection circuit is grounded with the second monitoring end of the processor respectively, the second end of the grounding terminal of the JTAG connector is used for being connected with the grounding port of the burner, the processor is also connected with the control end of the second control switch, and the second control switch is connected with the processor;
the processor is further used for controlling the second control switch to be switched off when the voltage pulse of the second monitoring end is monitored;
the second fusing device is used for forming an open circuit when the current value of the current flowing through the second fusing device is larger than the preset threshold value;
wherein the default state of the second control switch is a closed state.
Preferably, the first fusing device and the second fusing device are electronic fuses.
Preferably, the first control switch and the second control switch are both MOS transistors.
Preferably, the chip to be burned is a complex programmable logic device CPLD.
Preferably, the processor is the chip to be burned.
Preferably, the power supply is a voltage conversion chip on a mainboard where the chip to be burned is located.
Preferably, the signal connection system further comprises an alarm;
the processor is further configured to control the alarm to alarm when the voltage on the power pin of the chip to be burned is monitored to be abnormal.
Preferably, the alarm is a buzzer.
In order to solve the above technical problem, the present invention further provides a motherboard including the signal connection system described above.
The invention provides a signal connection system, and considering that a grounding end of a burner is connected to a power supply terminal of a JTAG connector to possibly damage the burner and a power supply, a first fusing device is arranged in a loop so as to automatically realize open circuit when the grounding end of the burner is connected to the power supply terminal of the JTAG connector.
The invention also provides a mainboard which has the same beneficial effects as the signal connection system.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a signal connection system according to the present invention;
fig. 2 is a schematic structural diagram of another signal connection system provided by the present invention.
Detailed Description
The core of the invention is to provide a signal connection system which has a double open circuit protection mechanism and greatly improves the reliability of open circuit protection, thereby preventing the damage of wiring errors to a burner and even a power supply to the maximum extent, reducing the maintenance cost and improving the working efficiency; the other core of the invention is to provide a mainboard comprising the signal connection system, which has a double open circuit protection mechanism and greatly improves the reliability of open circuit protection, thereby preventing the damage of a connection error to a burner and even a power supply to the greatest extent, reducing the maintenance cost and improving the working efficiency.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a signal connection system provided by the present invention, where the signal connection system includes a JTAG (Joint Test Action Group) connector, a power supply 2, a first protection circuit 3 formed by connecting a first fuse device 31 and a first control switch 32 in series, and a processor 4;
the output end of the power supply 2 is respectively connected with one end of a first protection circuit 3 and a first monitoring end of the processor 4, the other end of the first protection circuit 3 is connected with a first end of a power supply terminal of the JTAG connector 1, a second end of the power supply terminal of the JTAG connector 1 is used for being connected with the power supply 2 end of the burner, a first end of a signal terminal of the JTAG connector 1 is connected with a chip to be burned, and a second end of the signal terminal of the JTAG connector 1 is used for being connected with a signal output end of the burner;
the JTAG connector 1 is used for realizing JTAG signal connection between the chip to be burned and the burner through the JTAG connector;
the processor 4 is connected with the first control switch 32 and is used for controlling the first control switch 32 to be switched off when the voltage of the power supply 2 is monitored to be abnormal through the first monitoring end;
a first fuse device 31 for forming an open circuit by itself when a current value of a current flowing through itself is greater than a preset threshold value;
wherein the default state of the first control switch 32 is a closed state.
Specifically, considering the technical problems in the background art as described above, in combination with considering that there is a possibility of a wiring error when the burner is connected to the JTAG connector 1 through a cable, and once the ground terminal of the burner is connected to the power supply terminal of the JTAG connector 1, the burner and the power supply 2 may be damaged, in this application, the first fuse device 31 is disposed in the loop so as to automatically realize a circuit break when the ground terminal of the burner is connected to the power supply terminal of the JTAG connector 1, on this basis, the application further controls the first control switch 32 to be disconnected when the voltage of the power supply 2 is monitored by the processor 4 so as to realize a circuit break control, thereby preventing the first fuse device 31 from being abnormally disconnected, and because the application has a double circuit break protection mechanism, the reliability of the circuit break protection is greatly improved, thereby preventing the burner and even the power supply 2 from being damaged by the wiring error to the greatest extent, the maintenance cost is reduced and the working efficiency is improved.
Specifically, the JTAG connector 1 is used because the writer needs to communicate with the chip to be burned through the JTAG interface under normal conditions, and the JTAG connector 1 can provide the JTAG interface for both the writer and the chip to be burned and realize data communication between the two.
Of course, besides the JTAG connector 1, connectors with other interface forms may be provided based on the burner with different interface requirements, and the embodiment of the present invention is not limited herein.
Specifically, the first fuse device 31 may form an open circuit on itself when the current value of the current flowing through itself is greater than the preset threshold, and may automatically open the circuit due to the large current generated when the ground terminal of the writer is connected to the power supply terminal of the JTAG connector 1, thereby protecting the related devices.
In the embodiment of the present invention, the first control switch 32 is additionally disposed in the loop where the pin of the power supply 2 is located, and the processor 4 may monitor whether the voltage of the power supply 2 is normal through the first detection end to determine whether to disconnect the first control switch 32, where the voltage value should be a standard value (e.g., 3.3V) under normal conditions, and if the processor 4 finds that the deviation is large, for example, when the power supply 2 is grounded due to a wiring error and an instantaneous high voltage is generated (which may damage related devices), the first control switch 32 may be controlled to be disconnected, so as to implement open-circuit protection.
The series connection sequence of the first fuse device 31 and the first control switch 32 in the loop can be arbitrarily selected, and the embodiment of the invention is not limited herein.
The invention provides a signal connection system, and considering that a grounding end of a burner is connected to a power supply terminal of a JTAG connector to possibly damage the burner and a power supply, a first fusing device is arranged in a loop so as to automatically realize open circuit when the grounding end of the burner is connected to the power supply terminal of the JTAG connector.
For better explaining the embodiment of the present invention, please refer to fig. 2, fig. 2 is a schematic structural diagram of another signal connection system provided by the present invention, and on the basis of the above embodiment:
as a preferred embodiment, the signal connection system further includes a second protection circuit 5 formed by connecting a second fuse device 51 and a second control switch 52 in series;
a first end of a ground terminal of the JTAG connector 1 is connected with one end of a second protection circuit 5, the other end of the second protection circuit 5 is grounded with a second monitoring end of the processor 4, a second end of the ground terminal of the JTAG connector 1 is used for being connected with a ground port of a burner, the processor 4 is also connected with a control end of a second control switch 52, and the second control switch 52 is connected with the processor 4;
the processor 4 is further configured to control the second control switch 52 to turn off when the voltage pulse at the second monitoring terminal is monitored;
a second fuse device 51 for forming an open circuit by itself when a current value of a current flowing through itself is greater than a preset threshold value;
wherein the default state of the second control switch 52 is the closed state.
Specifically, considering that in some recorders, the power supply 2 end may also be designed to be externally powered, for example, 3.3V voltage may be output externally, in this case, if the power supply 2 end of the recorder is connected to the ground terminal of the JTAG connector 1 by mistake, a large current may be generated between the recorder and the ground, which may damage the recorder, in order to prevent this situation, in the embodiment of the present invention, two protection mechanisms are provided in the ground loop of the JTAG connector 1 (the second protection circuit 5 is provided between the ground terminal and the ground), which are the second fuse device 51 and the second control switch 52, respectively, the working principle of the second fuse device 51 is not described herein again, and after the second control switch 52 is added, as long as the processor 4 in this application monitors that the second monitoring end has a voltage pulse (approximately, it represents that the power supply 2 end of the recorder is grounded), the second control switch 52 can be controlled to be turned off, further improving safety.
In a preferred embodiment, the first fuse device 31 and the second fuse device 51 are electronic fuses.
Specifically, the electronic fuse has recoverability, can restore the self path when the current does not flow through the electronic fuse, so that the electronic fuse can be automatically restored after the wiring is restored to be correct, and has the advantages of simple structure and long service life.
Of course, the first fuse device 31 and the second fuse device 51 may be ordinary fuses besides the electronic fuses, and the embodiment of the present invention is not limited herein.
In a preferred embodiment, the first control switch 32 and the second control switch 52 are MOS transistors (Metal-Oxide-Semiconductor Field-Effect transistors).
Specifically, the MOS transistor has the advantages of simple structure, low cost, long life, and the like.
Of course, besides MOS transistors, the first control switch 32 and the second control switch 52 may be of other types, such as relays, and the like, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the chip to be burned is a complex programmable logic device CPLD.
Specifically, the CPLD has the advantages of wide application range, high maturity and the like.
Of course, the chip to be burned may be of other types besides the CPLD, and the embodiment of the present invention is not limited herein.
In a preferred embodiment, the processor 4 is a chip to be burned.
Specifically, the cost can be reduced by using the chip to be burned as the processor 4.
Of course, the processor 4 may be a processor 4 that is additionally disposed to be different from the chip to be burned, except for the chip to be burned, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the power supply 2 is a voltage conversion chip on the motherboard where the chip to be burned is located.
Specifically, the cost can be reduced by using the voltage conversion chip on the main board as the power supply 2, and the circuit structure can be simplified.
Of course, besides, the power supply 2 may also be an additional power supply 2 disposed on the motherboard, and the embodiment of the present invention is not limited herein.
As a preferred embodiment, the signal connection system further comprises an alarm 6;
the processor 4 is further configured to control the alarm 6 to alarm when the voltage on the pin of the power supply 2 of the chip to be burned is monitored to be abnormal.
Specifically, in order to facilitate the working personnel to know the abnormal voltage condition in time and carry out corresponding maintenance, the alarm 6 is further arranged in the embodiment of the invention, and the processor 4 can control the alarm 6 to give an alarm when monitoring that the voltage on the pin of the power supply 2 of the chip to be burned is abnormal, so that the maintenance efficiency is improved.
As a preferred embodiment, the alarm 6 is a buzzer.
Specifically, the buzzer has the advantages of small volume, low cost, long service life and the like.
Of course, the alarm 6 may be of various types other than a buzzer, and the embodiment of the present invention is not limited herein.
The invention also provides a mainboard comprising the signal connection system in the embodiment.
For the introduction of the motherboard provided by the embodiment of the present invention, reference is made to the foregoing embodiment of the signal connection system, and the embodiment of the present invention is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "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.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A signal connection system is characterized by comprising a joint test group (JTAG) connector, a power supply, a first protection circuit and a processor, wherein the first protection circuit is formed by connecting a first fusing device and a first control switch in series;
the output end of the power supply is respectively connected with one end of the first protection circuit and the first monitoring end of the processor, the other end of the first protection circuit is connected with the first end of the power supply terminal of the JTAG connector, the second end of the power supply terminal of the JTAG connector is used for being connected with the power supply end of the burner, the first end of the signal terminal of the JTAG connector is connected with the chip to be burned, and the second end of the signal terminal of the JTAG connector is used for being connected with the signal output end of the burner;
the JTAG connector is used for realizing JTAG signal connection between the chip to be burned and the burner through the JTAG connector;
the processor is connected with the first control switch and used for controlling the first control switch to be switched off when the voltage of the power supply is monitored to be abnormal through the first monitoring end;
the first fusing device is used for forming an open circuit when the current value of the current flowing through the first fusing device is larger than a preset threshold value;
wherein the default state of the first control switch is a closed state.
2. The signal connection system of claim 1, further comprising a second protection circuit formed by a second fuse device and a second control switch connected in series;
the first end of the grounding terminal of the JTAG connector is connected with one end of the second protection circuit, the other end of the second protection circuit is grounded with the second monitoring end of the processor respectively, the second end of the grounding terminal of the JTAG connector is used for being connected with the grounding port of the burner, the processor is also connected with the control end of the second control switch, and the second control switch is connected with the processor;
the processor is further used for controlling the second control switch to be switched off when the voltage pulse of the second monitoring end is monitored;
the second fusing device is used for forming an open circuit when the current value of the current flowing through the second fusing device is larger than the preset threshold value;
wherein the default state of the second control switch is a closed state.
3. The signal connection system of claim 2, wherein the first fuse device and the second fuse device are electronic fuses.
4. The signal connection system according to claim 2, wherein the first control switch and the second control switch are both MOS transistors.
5. The signal connection system according to claim 1, wherein the chip to be burned is a Complex Programmable Logic Device (CPLD).
6. The signal connection system of claim 1, wherein the processor is the chip to be burned.
7. The signal connection system of claim 1, wherein the power source is a voltage conversion chip on a motherboard where the chip to be burned is located.
8. The signal connection system according to any one of claims 1 to 7, further comprising an alarm;
the processor is further configured to control the alarm to alarm when the voltage on the power pin of the chip to be burned is monitored to be abnormal.
9. The signal connection system of claim 8, wherein the alarm is a buzzer.
10. A motherboard comprising a signal connection system as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858066.4A CN113721744B (en) | 2021-07-28 | 2021-07-28 | A motherboard and its signal connection system |
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| CN202110858066.4A CN113721744B (en) | 2021-07-28 | 2021-07-28 | A motherboard and its signal connection system |
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| CN113721744A true CN113721744A (en) | 2021-11-30 |
| CN113721744B CN113721744B (en) | 2023-07-21 |
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| CN113721744B (en) | 2023-07-21 |
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