Key burning device and equipment

Abstract

The utility model discloses a secret key burning device and equipment, and relates to the technical field of data security, the secret key burning device comprises a power supply module, a current limiting module, a control module and a burning module; the power supply module is respectively connected with the current limiting module and the control module and is used for supplying power to the key burning device; the current limiting module is also connected with the control module and the burning module, and is used for carrying out current limiting protection when the current exceeds a preset current protection limit value, and outputting the controlled current after current limiting protection to the burning module; the control module is further connected with the burning module and used for controlling the current limiting module and the burning module to be started. And the burning module is used for accessing the controlled current provided by the current limiting module and carrying out key burning on the chip. According to the technical scheme provided by the utility model, the current limiting module is adopted to carry out current limiting protection on the circuit of the secret key burning device, and when the current of the circuit exceeds the preset current protection limit value, the current limiting protection is carried out on the circuit, so that the chip can be protected from being burnt out when the circuit is short-circuited.

Description

Technical Field

[0001] The utility model relates to the technical field of data security, and particularly relates to a key burning device and equipment. Background Art

[0002] In the semiconductor manufacturing process, chip burning is a key step, which involves writing program code or other data into the chip to achieve specific functions.

[0003] Currently, most semiconductor manufacturing plants use dedicated burning equipment to complete this task. These devices usually have the characteristics of high precision and high speed, and can achieve automated burning through software control. The burning equipment is connected to the chip to be burned, and programming data is sent to the internal memory of the chip through a specific interface (such as SPI, I2C, etc.).

[0004] However, in actual operation, when the burning device performs chip burning, burning anomalies may occur due to various factors. For example, a short circuit caused by improper operation of technicians. Once a burning anomaly occurs, it is very likely that the chip will be burned out and cannot be used, thus increasing the production cost and reducing the yield. Therefore, how to reduce burning anomalies and improve the burning success rate has become one of the technical problems to be solved urgently. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a key burning device and equipment, aiming to solve the problem of how to reduce burning anomalies and improve the burning success rate.

[0006] To achieve the above purpose, the key burning device proposed by the utility model includes: a power supply module, a current limiting module, a control module, and a burning module;

[0007] The power supply module is respectively connected to the current limiting module and the control module, and is used to supply power to the key burning device;

[0008] The current limiting module is also connected to the control module and the burning module, and is used to perform current limiting protection when the current exceeds a preset current protection limit value, and output the controlled current after current limiting protection to the burning module;

[0009] The control module is also connected to the burning module, and is used to control the start of the current limiting module and the burning module;

[0010] The burning module is used to access the controlled current provided by the current limiting module and perform key burning on the chip.

[0011] In one embodiment, the power supply module includes: an adapter, an adapter interface, a level conversion unit, and a buck unit. The adapter, the adapter interface, the level conversion unit, and the buck unit are connected in sequence. The buck unit is further connected to the current limiting module and the control module;

[0012] The adapter is used to convert the mains power into low-voltage direct current and transmit the low-voltage direct current to the adapter interface;

[0013] The adapter interface is used to access the low-voltage direct current to the level conversion unit;

[0014] The level conversion unit is used to step down the low-voltage direct current to a first level;

[0015] The buck unit is used to step down the low-voltage direct current at the first level to a second level.

[0016] In one embodiment, the power supply module further includes: a data line, a Type-c interface, and a USB to serial port unit. The data line, the Type-c interface, and the USB to serial port unit are connected in sequence. The Type-c interface is further connected to the buck unit, and the USB to serial port unit is further connected to the control module;

[0017] The data line is used to connect to a power source and provide USB communication;

[0018] The Type-c interface is used to access current and transmit the current to the buck unit;

[0019] The USB to serial port unit is used to convert USB communication into UART communication.

[0020] In one embodiment, the control module includes: an MCU;

[0021] The MCU is used to control the enable signal of the current limiting module and is also used to control the communication of the programming module.

[0022] In one embodiment, the control module further includes: a display screen;

[0023] The display screen is connected to the MCU and is used to display the programming status of the programming module and the name of the key program version under the control of the MCU.

[0024] In one embodiment, the control module further includes: a programming button;

[0025] The programming button is connected to the MCU and is used to trigger the MCU to turn on the enable of the current limiting module and execute the programming command when pressed.

[0026] In one embodiment, the programming module includes: at least one first programming socket in a target package form and at least one expansion interface;

[0027] Each of the first programming sockets is connected to the control module, and each first programming socket is correspondingly connected to one of the expansion interfaces;

[0028] The first programming socket is used to program the key chip in the target package form and is also used to program external devices through the expansion interface.

[0029] In one embodiment, the key programming device includes a plurality of current limiting modules;

[0030] Each of the current limiting modules is correspondingly connected to one of the first programming sockets, and each of the current limiting modules is connected to a pin of the MCU, or each of the current limiting modules is respectively correspondingly connected to a pin of the MCU;

[0031] The current limiting module is used to disconnect the first programming socket corresponding to the current limiting module when it detects that the current exceeds a preset current protection limit value.

[0032] In one embodiment, the programming module further includes: at least one indicator light, and each indicator light is correspondingly connected to one of the first programming sockets;

[0033] The indicator light is used to display a first color when the programming is successful, display a second color when the programming is in progress, and display a third color when the programming is unsuccessful.

[0034] The present utility model also provides a key programming device. The key programming device includes the key programming device as described above. The key programming device is connected to the mains power or an external power supply, and is also connected to a test fixture and / or a second programming socket in a different package form.

[0035] The technical solution of the present utility model uses a current limiting module to perform current limiting protection on the circuit of the key programming device. When the current in the circuit exceeds the preset current protection limit value, current limiting protection is performed on the circuit, so that the chip can be protected from being burned when the circuit is short-circuited. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0037] Figure 1Schematic diagram of the module structure of an embodiment of the key burning device provided by the present utility model;

[0038] Figure 2 Schematic diagram of the partial circuit structure of an embodiment of the key burning device provided by the present utility model;

[0039] Figure 3 Schematic diagram of the partial circuit structure of another embodiment of the key burning device provided by the present utility model;

[0040] Figure 4 Schematic diagram of the partial circuit structure of yet another embodiment of the key burning device provided by the present utility model;

[0041] Figure 5 Schematic diagram of the overall circuit structure of yet another embodiment of the key burning device provided by the present utility model;

[0042] Figure 6 Schematic diagram of the connection of the partial structure of yet another embodiment of the key burning device provided by the present utility model;

[0043] Figure 7 Schematic diagram of the structure of an embodiment of the key burning device provided by the present utility model.

[0044] Explanation of the reference numerals in the drawings:

[0045] A, power supply module; 210, current limiting module; B, control module; C, burning module;

[0046] 101, mains power; 102, PC; 103, key burning device; 104, first burning socket; 105, key chip; 106, burning expansion interface (multi-channel); 107, PCBA test tooling; 108, I2C or single-bus key chips of various package forms on the PCBA board; 109, second burning sockets of various package forms; 110, I2C or single-bus key chips of various package forms;

[0047] 201, adapter; 202, data cable; 203, adapter interface; 204, Type-C interface; 205, DC-DC; 206, USB to serial port unit; 207, 3.3V LDO; 208, MCU; 209, display screen; 211, burning button; 212, indicating LED.

[0048] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0050] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0052] The present utility model provides a key burning device 103.

[0053] Please refer to Figure 1 , in an embodiment of the present utility model, the key burning device 103 includes: a power supply module A, a current limiting module 210, a control module B, and a burning module C;

[0054] The power supply module A is respectively connected to the current limiting module 210 and the control module B, and is used to supply power to the key burning device 103;

[0055] The current limiting module 210 is further connected to the control module B and the burning module C, and is used to perform current limiting protection when the current exceeds a preset current protection limit value, and output the controlled current after current limiting protection to the burning module C;

[0056] The control module B is further connected to the burning module C, and is used to control the start of the current limiting module 210 and the burning module C;

[0057] The programming module C is used to access the controlled current provided by the current limiting module 210 and program the key into the chip.

[0058] In this embodiment, the key programming device 103 includes a power supply module A, a current limiting module 210, a control module B, and a programming module C; the power supply module A is connected to the current limiting module 210 and the control module B to ensure that these two modules can obtain the required power. The current limiting module 210 is connected to the power supply module A, the control module B, and the programming module C. The control module B is connected to the power supply module A, the current limiting module 210, and the programming module C. The programming module C is connected to the control module B and the chip; the power supply module A is the energy source of the entire key programming device 103, responsible for providing a stable power supply for other modules, ensuring sufficient power support during the key programming process, and maintaining the stable operation of the system. The main function of the current limiting module 210 is to perform current limiting protection when the current exceeds a predetermined safety limit value, preventing excessive current from damaging the chip or other circuit components. By monitoring the current in the circuit, when the detected current exceeds the safe range, the current intensity is automatically reduced to protect the circuit from damage. The control module B is the control center of the entire system, responsible for coordinating the work of each module to ensure that the programming process is executed according to a predetermined process. The control module B controls the start and stop of the current limiting module 210 and the programming module C according to the set program instructions to ensure the precise execution of the programming process. The programming module C is the part that directly interacts with the chip and is responsible for writing the key data into the chip. Under the instruction of the control module B, the programming module C writes the key data into the specified area of the chip through a specific interface (such as SPI, I2C, etc.) to achieve key programming.

[0059] Specifically, the power supply module A supplies power to the entire system. The control module B initializes the states of each module and ensures that the current limiting module 210 is in a standby state. The control module B checks whether the power supply voltage is normal and whether the current limiting module 210 is ready. The control module B triggers the programming module C to start working and writes the key data into the chip. During the entire programming process, the current limiting module 210 continuously monitors the current situation. Once it is found that the current exceeds the preset protection limit value, current limiting measures are immediately taken to protect the circuit safety. After the programming is completed, the control module B turns off the programming module C, and the entire programming process ends.

[0060] The technical solution of the present invention uses the current limiting module 210 to perform current limiting protection on the circuit of the key programming device 103. When the current in the circuit exceeds the preset current protection limit value, current limiting protection is performed on the circuit, so that the chip can be protected from being burned when the circuit is short-circuited.

[0061] Based on the first embodiment of the key programming device 103 of the present invention, a second embodiment of the key programming device 103 of the present invention is proposed. The same content as in the above embodiment will not be repeated in this embodiment.

[0062] In the second embodiment of the key burning device 103 of the present utility model, specifically, please refer to Figure 2 , the power supply module A includes: an adapter 201, an adapter interface 203, a level conversion unit 205, and a step-down unit 207. The adapter 201, the adapter interface 203, the level conversion unit 205, and the step-down unit 207 are connected in sequence, and the step-down unit 207 is also connected to a current limiting module 210 and a control module B;

[0063] The adapter 201 is used to convert the commercial power 101 into low-voltage direct current and transmit the low-voltage direct current to the adapter interface 203;

[0064] The adapter interface 203 is used to access the low-voltage direct current to the level conversion unit 205;

[0065] The level conversion unit 205 is used to step down the low-voltage direct current to the first level;

[0066] The step-down unit 207 is used to step down the low-voltage direct current at the first level to the second level.

[0067] In this embodiment, the adapter 201, the adapter interface 203, the level conversion unit 205, and the step-down unit 207 are connected in sequence, and the step-down unit 207 is also connected to the current limiting module 210 and the control module B; the adapter 201 is the first part of the power supply module A, and its main function is to convert the external commercial power 101 (usually alternating current) into low-voltage direct current suitable for use by the key burning device 103, convert the commercial power 101 into direct current of 8-28V. The adapter interface 203 is used for physically connecting the adapter 201 and the level conversion unit 205 to ensure that the low-voltage direct current can be smoothly transmitted from the adapter 201 to the level conversion unit 205. The level conversion unit 205 (DC-DC205) is used to convert the level of 8-28V into a level of 5V, and then the step-down unit 207 is suitable for stepping down the voltage of 5V to 3.3V.

[0068] Furthermore, the power supply module A further includes: a data line 202, a Type-C interface 204, and a USB to serial port unit 206. The data line 202, the Type-C interface 204, and the USB to serial port unit 206 are connected in sequence. The Type-C interface 204 is also connected to the step-down unit 207, and the USB to serial port unit 206 is also connected to the control module B;

[0069] The data line 202 is used to connect to the power supply and provide USB communication;

[0070] The Type-C interface 204 is used to access the current and transmit the current to the step-down unit 207;

[0071] The USB-to-serial port unit 206 is used to convert USB communication into UART communication.

[0072] In this embodiment, the data line 202, the Type-C interface 204, and the USB-to-serial port unit 206 are connected in sequence. The Type-C interface 204 is also connected to the buck unit 207, and the USB-to-serial port unit 206 is also connected to the control module B.

[0073] The data line 202 is used to connect to an external power supply. The external power supply can be the PC 102 terminal, a mobile power supply, etc., and at the same time provides USB communication function. The Type-C interface 204 is the physical connection point between the data line 202 and the power supply module A, and supports the reversible plug design, which is convenient to use. The USB-to-serial port unit 206 is used to convert the USB communication protocol into the UART (Universal Asynchronous Receiver-Transmitter) communication protocol. Specifically, the external power supply powers the power supply module A through the data line 202, and the current enters the buck unit 207 through the Type-C interface 204. The buck unit 207 further steps down the current to a voltage level suitable for the current limiting module 210 and the control module B to work. The data line 202 provides USB communication capability for the USB-to-serial port unit 206 through the Type-C interface 204. The USB-to-serial port unit 206 converts USB communication into UART communication, which is convenient for the control module B to receive and process.

[0074] In this embodiment, the power supply method of the key burning device 103 is diverse, and it can directly obtain power from the mains 101 or the PC 102 terminal, making its usability stronger and operation more convenient.

[0075] Based on the first embodiment and / or the second embodiment of the key burning device 103 of the present utility model, a third embodiment of the key burning device 103 of the present utility model is proposed. The same content as in the above embodiments will not be repeated in this embodiment.

[0076] In the third embodiment of the key burning device 103 of the present utility model, specifically, please refer to Figure 3 , the control module B includes: an MCU 208;

[0077] The MCU 208 is used to control the enable signal of the current limiting module 210 and is also used to control the communication of the burning module C.

[0078] In this embodiment, the MCU 208 serves as the total control chip of the device, is used to control the communication between the various modules in the device, and controls the various modules through instruction signals.

[0079] Furthermore, the control module B further includes: a display screen 209;

[0080] The display screen 209 is connected to the MCU 208 and is used to display the burning status of the burning module C and the name of the key program version under the control of the MCU 208.

[0081] In this embodiment, the display screen 209 is used to display the burning status of the chip, the name and version of the key program, and provide visual information for the burning of the key.

[0082] Further, the control module B further includes: a burning button 211;

[0083] The burning button 211 is connected to the MCU 208 and is used to trigger the MCU 208 to enable the current limiting module 210 and execute the burning command when pressed.

[0084] In this embodiment, the burning button 211 is a physical control for performing burning. After pressing the burning button 211, the MCU 208 enables the current limiting module 210 and executes the burning command.

[0085] Based on the first to third embodiments of the key burning device 103 of the present utility model described above, a fourth embodiment of the key burning device 103 of the present utility model is proposed. The same content as in the above embodiments will not be repeated in this embodiment.

[0086] In the fourth embodiment of the key burning device 103 of the present utility model, specifically, please refer to Figure 4 , the burning module C includes: at least one first burning seat 104 in a target package form and at least one expansion interface 106;

[0087] Each first burning seat 104 is connected to the control module B, and each first burning seat 104 is correspondingly connected to an expansion interface 106;

[0088] The first burning seat 104 is used to burn the key chip 105 of the first specification and is also used to burn external devices through the expansion interface 106.

[0089] In this embodiment, the first burning seat 104 is a burning seat in SOIC-8 package. The device may include multiple first burning seats 104, that is, multi-channel burning is performed, and the number of channels is limited by requirements and the pin resources of the MCU 208. The expansion interface 106 corresponds to the first burning seat 104 one by one. The expansion interface 106 parallels signals such as power supply, ground, and bus of each burning seat to the wire-to-board connector, and can externally connect a PCBA test tooling 107 to burn the PCBA of the key chip 105 of each package form on the board through the I2C bus or the single bus, or can externally connect burning seats 109 of each package form to burn the key chip 105 of each package form through the I2C bus or the single bus.

[0090] As an example, please refer toFigure 5 , Figure 5 This is a schematic diagram of the overall circuit principle of the key burning device of the present utility model. Specifically, the burning device 103 inputs power through the adapter interface 203 or the Type-C interface 204, and only one of the two can be selected. The adapter 201 draws power from the mains, and the power input range is wide, and most adapters can meet this application; the data cable 202 draws power from the PC, and the Type-C data cable has a high penetration rate. These two power input methods make it convenient for the burning device 103 to obtain power, with stronger usability and more convenient operation.

[0091] In any power supply mode, after the burning device 103 obtains power, it is finally stepped down to 3.3V through the 3.3V LDO 207. One path of this 3.3V supplies power to the MCU 208, and the other path will be supplied to the SOIC-8 package multi-channel first burning seat 104 and the multi-channel burning expansion interface 106 after passing through the current limiting module 210.

[0092] The MCU 208 is responsible for enabling the current limiting module 210. When the burning button 211 is pressed, the MCU 208 first enables the current limiting module 210 and then executes the burning command. When the burning button 211 is not pressed, each burning seat and expansion interface is not powered, and the current protection limit value of the current limiting module 210 can be configured. When the key chip in the subsequent burning seat or expansion interface is placed in reverse, offset, or there is a short circuit due to human error such as a tweezer operation error, the current limiting protection will be triggered; this current limiting protection measure can effectively prevent device damage or key chip damage and improve the safety and reliability of the burning device.

[0093] In each SOIC-8 package multi-channel first burning seat 104, a single SOIC-8 package I2C bus key chip 105 can be placed for burning; it can also be connected to another PCBA test tooling 107 through the multi-channel burning expansion interface 106 by lead wire. The spring probe of the PCBA test tooling 107 contacts the test points of the relevant PCBA board-mounted key chip. Therefore, key chip board-mounted burning can be carried out, and other burning seats in other package forms can also be extended and connected for key burning. When burning the I2C bus key chip of each SOIC-8 package multi-channel first burning seat 104, the power supply, ground, SDA, and SCL signals are enabled simultaneously. When burning the single bus key chip, the power supply, ground, and SDA signals are enabled. And our burning device is multi-channel (the quantity is limited by requirements and the pin resources of the MCU), which can significantly improve the efficiency of the burning operation, and is expandable in interface design, and the flexibility of use is also improved.

[0094] The display screen 209 can display the name and version of the key program as well as the burning status. When the burning is successful, it will display "XX channel OK", otherwise it will display "XX channel NG". After connecting to the PC for flashing through the data cable 202, the name and version of the key program will be permanently displayed to prevent errors in the key burning operation. In necessary cases, secondary flashing can be performed through the PC side to change the key program or name type, etc., making the device more flexible and practical.

[0095] In one embodiment, the burning module further includes: at least one indicator light LED212, and each indicator light LED212 is correspondingly connected to a first burning seat 104;

[0096] The indicator light LED212 is used to display a first color when the burning is successful, a second color when the burning is in progress, and a third color when the burning is unsuccessful.

[0097] The LED is a three-color RGB. Red indicates that the burning is unsuccessful, blue indicates that the burning process is in progress, and green indicates that the burning is completed;

[0098] After the key chip burning is completed, the MCU208 turns off the enable of the current limiting module 210. At this time, each SOIC-8 package multi-channel first burning seat 104 and the multi-channel burning expansion interface 106 are no longer powered on, and at this time, the key chip that has been burned OK can be safely taken out.

[0099] In this embodiment, the key burning of the key burning device 103 is multi-channel, which can improve the efficiency of the key burning operation, and the burning interface is expandable. It can perform key burning for I2C or single-bus key chips 105 in various package forms through leads to other burning seats or PCBA test fixtures 107. The burning method can be single-chip burning or on-board burning, with high flexibility.

[0100] In addition, in a feasible implementation manner, please refer to Figure 6 , the key burning device includes a plurality of current limiting modules 210;

[0101] Each current limiting module 210 is correspondingly connected to a first burning seat 104, and each current limiting module 210 is connected to a pin of the MCU208, or each current limiting module 210 is respectively connected to a pin of the MCU208;

[0102] The current limiting module 210 is used to disconnect the first burning seat 104 corresponding to the current limiting module 210 when it detects that the current exceeds the preset current protection limit value.

[0103] In this embodiment, as Figure 6 shown, Figure 6Only the connection relationship between the current limiting module, each first burning socket and the MCU is shown, and other components and connection relationships that are the same as those in the above embodiment are not repeated here. The current limiting module 210 in the device can also be multiple current limiting modules 210, and each first burning socket 104 is connected to a current limiting module 210. All current limiting modules 210 can be connected to the same pin of MCU208 and controlled by the same pin of MCU208, or they can be connected to a pin of MCU208 respectively, and each pin controls a current limiting module 210. When a current limiting module 210 detects that the current of the connected first burning socket 104 is too large due to operation, the current limiting module 210 controls the corresponding first burning socket 104 to disconnect, so that when the first burning socket 104 is disconnected, other burning sockets can work normally.

[0104] The utility model also proposes a key burning device, which includes a key burning device 103. The specific structure of the key burning device 103 refers to the above embodiment. Since the key burning device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the key burning device is connected to the mains 101 or an external power supply, and is also connected to a test tool and / or a burning seat in different packaging forms.

[0105] As an example, see Figure 7 , either of the two power supply modes, the mains 101 and the PC 102, can satisfy the working power supply conditions of the key burning device 103 in the key burning equipment. The SOIC-8 package multi-channel first burning seat 104 of the key burning device 103 itself can perform key burning for the SOIC-8 package I2C bus key chip 105, and the multi-channels can be operated serially. The multi-channel burning extension interface 106 is connected to the PCBA test fixture 107 by means of leads, and the PCBA 108 with various package forms of I2C or single bus key chips on the board designed in a matching manner is placed therein, so that key burning can be performed for various PCBAs that have been welded and have reserved burning test points. In addition, the multi-channel burning extension interface 106 can also be connected to the burning seats 109 of various package forms by means of leads, so that key burning can be performed for various package forms of I2C or single bus key chips 110. Therefore, the utility model can be compatible with I2C bus and single bus key chip using single chip burning or onboard burning, and can directly draw power from the mains or PC end, making it more usable and more convenient to operate. In addition, the burning seat and the burning expansion interface of the utility model are multi-channel, which can significantly improve the efficiency of the burning operation. The expandable design of the burning interface improves the flexibility of the use of the burning device.

[0106] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A key burning device, characterized in that: The key burning device comprises: a power supply module, a current limiting module, a control module and a burning module; The power supply module is connected to the current limiting module and the control module respectively, and is used to supply power to the key burning device; The current limiting module is also connected to the control module and the programming module, and is used to perform current limiting protection when the current exceeds a preset current protection limit, and output the controlled current after current limiting protection to the programming module; The control module is also connected to the burning module, and is used to control the start-up of the current limiting module and the burning module; The burning module is used to access the controlled current provided by the current limiting module and burn the key to the chip.

2. The key burning device according to claim 1, characterized in that: The power supply module includes: an adapter, an adapter interface, a level conversion unit and a voltage reduction unit, wherein the adapter, the adapter interface, the level conversion unit and the voltage reduction unit are connected in sequence, and the voltage reduction unit is also connected to the current limiting module and the control module; The adapter is used to convert the mains power into low-voltage direct current power and transmit the low-voltage direct current power to the adapter interface; The adapter interface is used to connect the low voltage direct current to the level conversion unit; The level conversion unit is used to step down the low voltage direct current to a first level; The step-down unit is used to step down the low-voltage direct current of the first level to a second level.

3. The key burning device as claimed in claim 2, characterized in that: The power supply module further includes: a data line, a Type-c interface and a USB to serial port unit, wherein the data line, the Type-c interface and the USB to serial port unit are connected in sequence, the Type-c interface is also connected to the step-down unit, and the USB to serial port unit is also connected to the control module; The data line is used to connect the power supply and provide USB communication; The Type-c interface is used to access current and transmit the current to the step-down unit; The USB to serial port unit is used to convert USB communication into UART communication.

4. The key burning device as claimed in claim 1, characterized in that: The control module includes: MCU; The MCU is used to control the enable signal of the current limiting module and also to control the communication of the burning module.

5. The key burning device as claimed in claim 4, characterized in that: The control module also includes: a display screen; The display screen is connected to the MCU and is used for displaying the burning status of the burning module and the key program version name under the control of the MCU.

6. The key burning device as claimed in claim 5, characterized in that: The control module also includes: a burning button; The burning button is connected to the MCU and is used to trigger the MCU to enable the current limiting module and execute the burning command when being pressed.

7. The key burning device as claimed in claim 4, characterized in that: The burning module comprises: at least one first burning seat in a target packaging form and at least one expansion interface; Each of the first burning sockets is connected to the control module, and each of the first burning sockets is correspondingly connected to one of the expansion interfaces; The first burning seat is used to burn the key chip in the target packaging form, and is also used to burn the external device through the expansion interface.

8. The key burning device as claimed in claim 7, characterized in that: The key burning device includes a plurality of current limiting modules; Each of the current limiting modules is connected to one of the first burning sockets, and each of the current limiting modules is connected to one pin of the MCU, or each of the current limiting modules is connected to one pin of the MCU; The current limiting module is used to disconnect the first burning socket corresponding to the current limiting module when detecting that the current exceeds the preset current protection limit value.

9. The key burning device according to claim 1, characterized in that: The burning module further comprises: at least one indicator light, each of which is connected to a corresponding first burning socket; The indicator light is used to display a first color when the burning is successful, a second color when the burning is in progress, and a third color when the burning is unsuccessful.

10. A key burning device, characterized in that: The key burning device comprises the key burning apparatus according to any one of claims 1 to 8; The key burning device is connected to the mains or an external power supply, and is also connected to a test tool and / or a second burning socket in a different packaging form.

Images