A calibration aid

Abstract

The application provides a calibration auxiliary device applied to the computer technology field, which comprises a substrate, a chip base and a resistance adjusting module arranged on the substrate. The chip base is adapted to the pin of a chip to be calibrated and is used for mounting the chip to be calibrated. The resistance adjusting module comprises a main control module and a calibration resistance module. The calibration resistance module is connected between the calibration pin of the chip to be calibrated and the ground. The first control end of the main control module is connected with the controlled end of the calibration resistance module. The main control module can adjust the resistance value of the calibration resistance module to a target resistance value. When the internal resistance of the chip to be calibrated is calibrated, the actual resistance value of the calibration resistance module can be adjusted through the control module, so that different calibration resistance values are provided to the chip to be calibrated, the calibration resistance does not need to be replaced, manual welding of the calibration resistance and errors caused by the manual welding are avoided, and therefore the internal resistance calibration efficiency and reliability of the chip are effectively improved.

Description

Technical Field

[0001] This application relates to the field of computer technology, and more specifically, to a calibration aid device. Background Technology

[0002] With the continuous development of computer technology, the signal transmission rate of high-speed chip interfaces is getting higher and higher. The impact of chip internal resistance (hereinafter referred to as internal resistance) on high-speed signal transmission is becoming increasingly obvious. Therefore, the chip internal resistance needs to be calibrated before the chip is put on the market.

[0003] The process of calibrating the internal resistance of a chip usually involves connecting a high-precision calibration resistor with a preset resistance value to the calibration pin of the chip. The chip enables the internal reference current source to generate a calibration voltage across the calibration resistor. The internal comparator compares the magnitude of the calibration voltage with the reference voltage and continuously adjusts the internal resistance configuration value until the output of the internal comparator flips, confirming that the internal resistance is equal to the resistance value of the calibration resistor, thus completing one calibration cycle.

[0004] However, chips often require multiple internal resistance calibrations during the debugging phase. The relevant technology involves manually soldering to replace the calibration resistor, which is not only inefficient but also prone to introducing large errors, thus affecting the reliability of the chip's internal resistance calibration. Utility Model Content

[0005] The purpose of this application is to provide a calibration auxiliary device to improve the efficiency and reliability of chip internal resistance calibration and meet practical application needs.

[0006] Based on the above, this application provides a calibration auxiliary device, comprising: a substrate, a chip mount disposed on the substrate, and a resistance adjustment module, wherein,

[0007] The chip base is pin-adapted to the chip to be calibrated and is used to mount the chip to be calibrated.

[0008] The resistance adjustment module includes: a main control module and a calibration resistor module, wherein...

[0009] The first end of the calibration resistor module is connected to the calibration pin of the chip to be calibrated via the chip base, and the second end of the calibration resistor module is grounded.

[0010] The first control terminal of the main control module is connected to the controlled terminal of the calibration resistor module, and outputs a first control signal to the calibration resistor module. The first control signal is used to adjust the resistance value of the calibration resistor module to the target resistance value.

[0011] The calibration auxiliary device provided in this application includes a substrate and a chip base and a resistance adjustment module disposed on the substrate. The chip base is adapted to the pins of the chip to be calibrated for mounting the chip. The resistance adjustment module includes a main control module and a calibration resistor module. The calibration resistor module is connected between the calibration pin of the chip to be calibrated and ground. The first control terminal of the main control module is connected to the controlled terminal of the calibration resistor module. The main control module can adjust the resistance value of the calibration resistor module to the target resistance value. When performing internal resistance calibration on the chip to be calibrated, the actual resistance value of the calibration resistor module can be adjusted through the control module to provide different calibration resistance values ​​to the chip to be calibrated. Moreover, it is not necessary to replace the calibration resistor, avoiding manual soldering of the calibration resistor and the errors introduced therefrom, thereby effectively improving the efficiency and reliability of chip internal resistance calibration.

[0012] In one optional implementation, the resistance adjustment module further includes an auxiliary calibration module, wherein,

[0013] The output terminal of the auxiliary calibration module is connected to the first terminal of the calibration resistor module;

[0014] The second control terminal of the main control module is connected to the controlled terminal of the auxiliary calibration module, and outputs a second control signal to the auxiliary calibration module. The second control signal is used to control the auxiliary calibration module to output a calibration electrical signal.

[0015] The calibration resistor module generates a feedback voltage in response to the calibration electrical signal;

[0016] The sampling terminal of the main control module is connected to the first terminal of the calibration resistor module to collect the feedback voltage;

[0017] The first control signal is determined based on the deviation between the feedback voltage and the target voltage, and the target voltage is determined based on the calibration electrical signal and the target resistance value.

[0018] In the calibration auxiliary device provided in this application, an auxiliary calibration module is added. The auxiliary calibration module can calibrate the actual resistance value of the calibration resistor module to ensure that the actual resistance value of the calibration resistor module is the target resistance value, thereby ensuring the reliability and accuracy of the chip internal resistance calibration.

[0019] In one optional implementation, the auxiliary calibration module includes: a constant current source module and a controllable switch, wherein,

[0020] The output terminal of the constant current source module is connected to the input terminal of the controllable switch;

[0021] The output terminal of the controllable switch serves as the output terminal of the auxiliary calibration module.

[0022] The controlled terminal of the controllable switch serves as the controlled terminal of the auxiliary calibration module;

[0023] The controllable switch is turned on in response to the second control signal to output the calibration current provided by the constant current source module;

[0024] The calibration resistor module generates the feedback voltage in response to the calibration current, and the target voltage is the product of the calibration current and the target resistance value.

[0025] In the calibration auxiliary device provided in this application, the auxiliary calibration module includes a constant current source module and a controllable switch. The main control module controls the constant current source module to provide calibration current by controlling the conduction state of the controllable switch. By utilizing the stable and constant output current of the constant current source module, the reliability of the calibration current is ensured, which helps to improve the reliability and accuracy of calibrating the actual resistance value of the calibration resistor module.

[0026] In one optional implementation, the auxiliary calibration module includes: a constant voltage source module, a standard resistor, and a controllable switch, wherein,

[0027] The output terminal of the constant voltage source module is connected to one end of the standard resistor, and the other end of the standard resistor is connected to the input terminal of the controllable switch.

[0028] The output terminal of the controllable switch serves as the output terminal of the auxiliary calibration module.

[0029] The controlled terminal of the controllable switch serves as the controlled terminal of the auxiliary calibration module;

[0030] The controllable switch is turned on in response to the second control signal to output the calibration current provided by the constant voltage source module;

[0031] The calibration resistor module generates the feedback voltage in response to the calibration current. The target voltage is the product of the target voltage division ratio and the output voltage of the constant voltage source module. The target voltage division ratio is determined based on the resistance value of the standard resistor and the target resistance value.

[0032] In the calibration auxiliary device provided in this application, the auxiliary calibration module includes a constant voltage source module, a standard resistor, and a controllable switch. The constant voltage source module provides a stable calibration current, and the calibration resistor module and the standard resistor divide the voltage to generate a feedback voltage. By utilizing the stable output voltage provided by the constant voltage source module, the stability of the feedback voltage is ensured, which helps to improve the reliability and accuracy of calibrating the actual resistance value of the calibration resistor module.

[0033] In one optional embodiment, the resistance adjustment module further includes an analog-to-digital conversion module, wherein,

[0034] The input terminal of the analog-to-digital converter module is connected to the first terminal of the calibration resistor module, and the output terminal of the analog-to-digital converter module is connected to the sampling terminal of the main control module.

[0035] The analog-to-digital converter module is used to convert the analog feedback voltage into a digital feedback voltage.

[0036] In the calibration auxiliary device provided in this application, an analog-to-digital conversion module is added. The analog feedback voltage is converted into a digital feedback voltage through the analog-to-digital conversion module, which ensures that the main control module can reliably identify the feedback voltage. Furthermore, by setting up an independent analog-to-digital conversion module, the structure of the main control module can be simplified and the implementation difficulty of the main control module can be reduced.

[0037] In an optional embodiment, the calibration auxiliary device provided in the first aspect of this application further includes: a clock module disposed on the substrate, wherein,

[0038] The first output terminal of the clock module is connected to the clock pin of the chip to be calibrated via the chip base;

[0039] The second output terminal of the clock module shown is connected to the clock input terminal of the main control module, so as to provide a clock signal to the main control module through the second output terminal;

[0040] The third control terminal of the main control module is connected to the controlled terminal of the clock module and outputs a clock enable signal to the clock module. The clock enable signal is used to enable the clock module to provide a clock signal to the chip to be calibrated through the first output terminal.

[0041] In the calibration auxiliary device provided in this application, a dedicated clock module is added. The clock module provides the clock signal required for operation to the chip to be calibrated and the main control module. This setting can improve the applicability of the calibration auxiliary device. Even without the support of an external clock signal, the clock signal can still be provided by its own clock module, thereby ensuring the smooth progress of the chip internal resistance calibration process and reducing the dependence of the calibration process on the external environment.

[0042] In an optional embodiment, the calibration auxiliary device provided in the first aspect of this application further includes: a power supply module disposed on the substrate, wherein...

[0043] The input terminal of the power supply module is used to receive the power supply voltage;

[0044] The first output terminal of the power supply module is connected to the power pin of the chip to be calibrated via the chip base;

[0045] The second output terminal of the power supply module is connected to the power supply terminals of the resistor adjustment module and the clock module, respectively.

[0046] The power supply module is used to convert the power supply voltage into an operating voltage that is compatible with the chip to be calibrated, the clock module, and the resistor adjustment module.

[0047] In the calibration auxiliary device provided in this application, a dedicated power supply module is added. The power supply module provides the operating voltage required for operation to the chip to be calibrated, the clock module, and the resistance adjustment module. This setting can improve the applicability of the calibration auxiliary device. Even without the support of a matching external power supply, it can still use its own power supply module to provide the operating voltage, thereby ensuring the smooth progress of the chip internal resistance calibration process and reducing the dependence of the calibration process on the external environment.

[0048] In one optional implementation, the fourth control terminal of the main control module is connected to the controlled terminal of the power supply module, and outputs a power supply enable signal to the power supply module. The power supply enable signal is used to enable the power supply module to output a working voltage to the chip to be calibrated through the first output terminal.

[0049] In the calibration auxiliary device provided in this application, the fourth control terminal of the main control module is connected to the controlled terminal of the power supply module. The main control module can control the working state of the power supply module and control whether the power supply module provides working voltage to the chip to be calibrated. This setting can further improve the automation level of the calibration auxiliary device and help improve the chip internal resistance calibration efficiency.

[0050] In an optional embodiment, the calibration auxiliary device provided in the first aspect of this application further includes: a test interface disposed on the substrate, wherein...

[0051] The input terminal of the test interface is connected to the signal pin of the chip to be calibrated via the chip base;

[0052] The output of the test interface is used to connect to a waveform display device, which is used to display the signal waveform of the signal pin when the chip to be calibrated is in test mode.

[0053] The calibration auxiliary device provided in this application includes a test interface that can be connected to a waveform display device. This waveform display device can display the signal waveform of the signal pins of the chip to be calibrated when it is in test mode. Testers can visually observe the signal waveform of the signal pins through the waveform display device, thereby monitoring the calibration process and helping to improve the calibration effect and the reliability of the calibration results.

[0054] In one alternative implementation, the calibration resistor module includes a digital potentiometer.

[0055] In the calibration auxiliary device provided in this application, the calibration resistor module is based on a digital potentiometer. Taking advantage of its ability to control the resistance value through digital signals, high precision, and long lifespan, the efficiency and accuracy of the calibration resistor module in adjusting its own resistance value are improved, thereby improving the efficiency and reliability of chip internal resistance calibration. At the same time, the implementation process of the calibration resistor module can be simplified. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a structural block diagram of the first calibration auxiliary device provided in the embodiments of this application.

[0058] Figure 2 This is a structural block diagram of a second calibration auxiliary device provided in an embodiment of this application.

[0059] Figure 3 This is a structural block diagram of a third calibration auxiliary device provided in an embodiment of this application.

[0060] Figure 4 This is a structural block diagram of the fourth calibration auxiliary device provided in the embodiments of this application.

[0061] Figure 5 This is a structural block diagram of the fifth calibration auxiliary device provided in the embodiments of this application.

[0062] Figure 6 This is a structural block diagram of the sixth calibration auxiliary device provided in the embodiments of this application. Detailed Implementation

[0063] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0064] To address the problems of low efficiency and significant errors introduced by manual soldering when replacing calibration resistors in related technologies, which affect the reliability of chip internal resistance calibration, this application provides a calibration auxiliary device. When calibrating the internal resistance of a chip, different calibration resistance values ​​can be provided to the chip by adjusting the actual resistance value of the calibration resistor module, without having to replace the calibration resistor. This avoids the manual soldering of the calibration resistor and the errors introduced therefrom, thereby effectively improving the efficiency and reliability of chip internal resistance calibration.

[0065] Based on the above, see Figure 1 The calibration auxiliary device provided in this application includes: a substrate 10, a chip base 20 disposed on the substrate 10, and a resistance adjustment module 30, wherein the resistance adjustment module 30 includes a main control module 31 and a calibration resistance module 32.

[0066] Combination Figure 1 As shown, the substrate 10 is used to support the chip base 20 and the resistance adjustment module 30. In an optional embodiment, the substrate 10 can be implemented based on a PCB (Printed Circuit Board). Correspondingly, the connection between the chip base 20 and the resistance adjustment module 30 can be achieved by laying copper wires on the PCB. Of course, in practical applications, the substrate 10 can also be implemented in other ways. Any method that can be used to mount the chip base 20, the resistance adjustment module 30, and other components described in subsequent embodiments, and establish the interconnection relationship between the various components, is optional and falls within the scope of protection of this application as long as it does not exceed the core concept of this application.

[0067] The chip mount 20 is pin-adapted with the chip 40 to be calibrated for mounting the chip 40. In practical applications, the chip 40 to be calibrated can be a CPU (Central Processing Unit) chip, or other chips that require internal resistance calibration. In an optional embodiment, the chip mount 20 and the pins of the chip 40 to be calibrated are connected by plugging or pressing. In this case, the contacts between the chip mount 20 and the chip 40 to be calibrated need to be set according to the pin configuration of the chip 40 to ensure that the chip 40 to be calibrated can reliably connect to each pin of the chip 40 when mounted on the chip mount 20. When performing internal resistance calibration on the chip 40, simply plug the chip 40 into the chip mount 20. Of course, in practical applications, chip mounts that adapt to multiple chip models can also be provided to improve the versatility of the calibration auxiliary device. As for the specific implementation of the chip mount, refer to relevant technologies and the specific pin arrangement of the chip to be calibrated, which will not be detailed here.

[0068] Combination Figure 1 As shown, the first end of the calibration resistor module 32 in the resistance adjustment module 30 is connected to the calibration pin S1 of the chip to be calibrated 40 via the chip base 20. The second end of the calibration resistor module 32 is grounded. The first control terminal C1 of the main control module 31 is connected to the controlled terminal of the calibration resistor module 32. In practical applications, the main control module 31 can output a first control signal to the calibration resistor module 32. This first control signal is used to adjust the resistance value of the calibration resistor module 32 to the target resistance value. It can be understood that the target resistance value mentioned in the embodiments of this application refers to the reference resistance value when the chip to be calibrated 40 is calibrated for internal resistance. In practical applications, it can be determined according to the performance parameters of the chip to be calibrated 40 and the specific internal resistance calibration requirements. This application does not limit the specific value of the target resistance value.

[0069] To meet testing requirements in different scenarios, the resistance value of the calibration resistor module 32 can be adjusted according to the first control signal from the main control module 31. In one optional implementation, the calibration resistor module 32 is implemented using a digital potentiometer. Utilizing the advantages of digital potentiometers—high precision and long lifespan—which allow for resistance value control via digital signals, improves the efficiency and accuracy of the calibration resistor module in adjusting its own resistance value, thereby enhancing the efficiency and reliability of chip internal resistance calibration. Simultaneously, it simplifies the implementation process of the calibration resistor module. The specific process of the digital potentiometer adjusting its resistance value in response to the first control signal can be found in relevant technologies and will not be detailed here.

[0070] It should be noted that, in order to facilitate the demonstration of the relationship between the pins of the chip 40 to be calibrated and the chip base 20, the relevant pins of the chip 40 to be calibrated are shown in the following embodiments: Figure 1 The center mark is placed between the chip to be calibrated 40 and the chip base 20. This setting will be used in subsequent embodiments and will not be repeated.

[0071] It should also be noted that after adjusting the resistance value of the calibration resistor module 32 to the target resistance value, the chip 40 to be calibrated can perform internal resistance calibration based on the target resistance value provided by the calibration resistor module 32. This means that the internal reference current source can generate a calibration voltage on the calibration resistor module 32. The internal comparator compares the magnitude of the calibration voltage with the reference voltage and continuously adjusts the internal resistance configuration value until the output of the internal comparator flips, confirming that the internal resistance is equal to the target resistance value, thus completing one calibration process.

[0072] In summary, the calibration auxiliary device provided in this application allows the main control module to adjust the resistance value of the calibration resistor module to the target resistance value. When calibrating the internal resistance of the chip to be calibrated, the actual resistance value of the calibration resistor module can be adjusted by the control module to provide different calibration resistance values ​​to the chip. Moreover, it is not necessary to replace the calibration resistor, avoiding manual soldering of the calibration resistor and the errors introduced therefrom, thereby effectively improving the efficiency and reliability of chip internal resistance calibration.

[0073] This application also provides another calibration auxiliary device, see [link to documentation]. Figure 2 As shown, compared to Figure 1 In the embodiment shown, the calibration auxiliary device provided in this embodiment further includes an auxiliary calibration module 33 in the resistance adjustment module 30.

[0074] Combination Figure 2 As shown, the output terminal D1 of the auxiliary calibration module 33 is connected to the first terminal of the calibration resistor module 32, and the second control terminal C2 of the main control module 31 is connected to the controlled terminal D2 of the auxiliary calibration module 33, outputting a second control signal to the auxiliary calibration module 33. The auxiliary calibration module 33 outputs a calibration electrical signal through the second control signal. In practical applications, the calibration electrical signal output by the auxiliary calibration module 33 can be a calibration current. The optional implementation methods of the auxiliary calibration module 33 will be discussed in subsequent embodiments and will not be detailed here.

[0075] The calibration resistor module 32 responds to the calibration electrical signal and generates a feedback voltage at its input terminal. The sampling terminal C3 of the main control module 31 is connected to the first terminal of the calibration resistor module 32 to acquire this feedback voltage. Simultaneously, the main control module 31 can determine the target voltage based on the calibration electrical signal and the aforementioned target resistance value. Based on the deviation between the obtained feedback voltage and the target voltage, it determines and generates the aforementioned first control signal. It can be understood that the target voltage corresponds to the voltage when the resistance of the calibration resistor module 32 is the target resistance value, while the feedback voltage corresponds to the voltage corresponding to the actual resistance value of the calibration resistor module 32. Ideally, the target voltage and the feedback voltage are equal, indicating that the actual resistance value of the calibration resistor module 32 is the target resistance value, meeting the calibration requirements of the chip 40 to be calibrated. If the target voltage and the feedback voltage are not equal, it indicates that the actual resistance value of the calibration resistor module 32 is not the target resistance value. In this case, the main control module 31 needs to output the first control signal to adjust the actual resistance value of the calibration resistor module 32 to the target resistance value. The main control module 31 compares the voltage deviation between the target voltage and the feedback voltage, and outputs a first control signal based on the voltage deviation. This process can be implemented with reference to relevant technologies and is not a key improvement point of this application. This application does not limit the specific implementation process of the main control module 31 outputting the first control signal based on the target voltage and the feedback voltage.

[0076] As for the connections and functions of the other components in the calibration auxiliary device, please refer to the relevant content of the foregoing embodiments, which will not be repeated here.

[0077] In summary, based on the foregoing embodiments, the calibration auxiliary device provided in this embodiment can calibrate the actual resistance value of the calibration resistor module 32 through the auxiliary calibration module 33 before calibrating the internal resistance of the chip 40 to be calibrated, ensuring that the resistance value of the calibration resistor module 32 is the target resistance value, thereby ensuring the reliability and accuracy of subsequent chip internal resistance calibration.

[0078] It is understandable that in the aforementioned embodiment, the sampling terminal of the main control module is connected to the first terminal of the calibration resistor module to directly obtain the feedback voltage of the calibration resistor module. However, the feedback voltage of the calibration resistor module is an analog quantity. The main control module needs to integrate an analog-to-digital conversion function internally to convert the analog feedback voltage into a digital feedback voltage. This will undoubtedly increase the design difficulty and cost of the main control module, and at the same time make the overall function of the main control module more complex, placing higher demands on the operational stability and reliability of the main control module.

[0079] To address the aforementioned issues, embodiments of this application also provide another calibration auxiliary device, see [link to relevant documentation]. Figure 3 As shown, in Figure 2 Based on the embodiment shown, in the calibration auxiliary device provided in this embodiment, the resistance adjustment module 30 is supplemented with an analog-to-digital conversion (ADC) module 34.

[0080] Combination Figure 3 As shown, the input terminal of the ADC module 34 is connected to the first terminal of the calibration resistor module 32, and the output terminal of the ADC module 34 is connected to the sampling terminal C3 of the main control module 31. The ADC module 34 converts the collected analog feedback voltage into a digital feedback voltage and finally sends the digital feedback voltage to the main control module 31 so that the main control module 31 can accurately read the feedback voltage. By setting up an independent ADC module, the composition and overall function of the main control module 31 can be simplified, the requirements for the operational stability and reliability of the main control module 31 can be reduced, and the design difficulty and cost of the main control module 31 can be reduced.

[0081] Furthermore, the calibration auxiliary device provided in this embodiment also includes a clock module 50 disposed on the substrate 10, combined with... Figure 3As shown, the first output terminal B1 of the clock module 50 is connected to the clock pin S2 of the chip to be calibrated 40 via the chip base 20. The second output terminal B2 of the clock module 50 is connected to the clock input terminal C4 of the main control module 31. The third control terminal C5 of the main control module 31 is connected to the controlled terminal B3 of the clock module 50. Based on the aforementioned connection relationship, after the clock module 50 is running, it can directly provide a clock signal to the main control module 31 through the second output terminal B2, ensuring that the main control module 31 can operate normally. In other words, in practical applications, the clock module 50 starts before the main control module 31, providing the clock signal required for normal operation to the main control module 31. After the main control module 31 starts, it can control the clock module 50 to provide a clock signal to the chip 40 to be calibrated via the third control terminal C5, thereby controlling the calibration process of the chip 40. For example, if it is determined that the chip 40 to be calibrated will undergo internal resistance calibration, the main control module 31 outputs a clock enable signal to the clock module 50 via the third control terminal C5, and controls the clock module 50 to provide a clock signal to the chip 40 to be calibrated via the first output terminal B1, so that the chip 40 to be calibrated can operate based on the obtained clock signal, thereby completing the internal resistance calibration. The specific implementation of the main control module 31 controlling the internal resistance calibration process of the chip 40 to be calibrated based on the clock enable signal will be discussed in subsequent content and will not be detailed here.

[0082] As for the connections and functions of the other components in the calibration auxiliary device, please refer to the relevant content of the foregoing embodiments, which will not be repeated here.

[0083] In the calibration auxiliary device provided in this application embodiment, a dedicated clock module for the calibration auxiliary device is added. The clock module provides the clock signal required for operation to the chip to be calibrated and the main control module. This setting can improve the applicability of the calibration auxiliary device. Even without the support of an external clock signal, the clock signal can still be provided by its own clock module, thereby ensuring the smooth progress of the chip internal resistance calibration process and reducing the dependence of the calibration process on the external environment.

[0084] This application also provides another calibration auxiliary device, see [link to documentation]. Figure 4 As shown, in Figure 3 Based on the illustrated embodiment, the calibration auxiliary device provided in this application embodiment also includes a power supply module 60 and a test interface 70 disposed on the substrate 10.

[0085] Specifically, the input terminal of the power supply module 60 is used to receive the power supply voltage (not shown in the figure) and convert the obtained power supply voltage into an operating voltage that is compatible with the chip 40 to be calibrated, the clock module 50 and the resistor adjustment module 30. In practical applications, a power interface can also be set on the substrate 10, and the input terminal of the power supply module 60 is connected to the power interface. An external power supply is connected through the power interface to receive the power supply voltage provided by the external power supply.

[0086] Combination Figure 4 As shown, the first output terminal A1 of the power supply module 60 is connected to the power pin S3 of the chip to be calibrated 40 via the chip base 20. The second output terminal A2 of the power supply module 60 is connected to the power terminal B4 of the clock module and the power terminal of the resistance adjustment module 30, respectively. In this embodiment, the power terminal C6 of the main control module 31 and the power terminal D3 of the auxiliary calibration module 33 are used together as the power terminal of the resistance adjustment module 30. Therefore, the power terminal C6 of the main control module 31 and the power terminal D3 of the auxiliary calibration module 33 are connected to the second output terminal A2 of the power supply module 60, respectively. After the power supply module 60 is started, it can directly provide working voltage to the main control module 31 and the auxiliary calibration module 33 through the second output terminal A2, so that the two can be powered on and run normally.

[0087] It should be noted that when the calibration resistor module 32 is implemented using a digital potentiometer, the second output terminal A2 of the power supply module 60 can be further connected to the power supply terminal of the digital potentiometer. Figure 4 (Not shown in the image) is connected to a power supply module 60, which provides the operating voltage required for the digital potentiometer to operate.

[0088] It should also be noted that if the operating voltages of the calibration resistor module 32, the main control module 31, the constant voltage source module 331, and the clock module 50 (including the constant current source module 332 described in subsequent embodiments) are different, the power supply module 60 can be configured with different output terminals to provide operating voltages to the calibration resistor module 32, the main control module 31, the constant voltage source module 331, and the clock module 50 respectively. This is also feasible and falls within the scope of protection of this application. As for the specific implementation of the power supply module 60, please refer to relevant technologies, which will not be detailed here.

[0089] In the calibration auxiliary device provided in this application embodiment, a dedicated power supply module is added. The power supply module provides the operating voltage required for operation to the chip to be calibrated, the clock module, and the resistance adjustment module. This setting can improve the applicability of the calibration auxiliary device. Even without matching external power supply support, it can still use its own power supply module to provide operating voltage, thereby ensuring the smooth progress of the chip internal resistance calibration process and reducing the dependence of the calibration process on the external environment.

[0090] Furthermore, in combination Figure 4As shown, in one optional implementation, the power supply module 60 is provided with a controlled terminal A3. The fourth control terminal C7 of the main control module 31 is connected to the controlled terminal A3 of the power supply module 60. The main control module 31 can output a power supply enable signal to the power supply module 60, thereby controlling the power supply module 60 to supply power to the chip 40 to be calibrated, and thus controlling the internal resistance calibration process of the chip 40 to be calibrated. Specifically, when the main control module 31 outputs the power supply enable signal, the power supply module 60 is enabled to provide the working voltage to the chip 40 to be calibrated through the first output terminal A1. Correspondingly, when the main control module 31 does not output the power supply enable signal, the power supply module 60 will not provide the working voltage to the chip 40 to be calibrated. Of course, the power supply process of the power supply module 60 to the clock module 50 and the resistance adjustment module 30 is not affected by the power supply enable signal; the power supply module 60 provides the working voltage to both immediately after startup. This configuration allows the main control module 31 to control the working state of the power supply module 60, that is, to control the power supply module 60 to provide the working voltage, thereby further improving the automation level of the calibration auxiliary device and helping to improve the efficiency of chip internal resistance calibration.

[0091] Furthermore, Figure 4 The calibration auxiliary device provided in the embodiment shown also includes a test interface 70 disposed on the substrate 10. The input end of the test interface 70 is connected to the signal pin S4 of the chip to be calibrated 40 via the chip base 20. The output end of the test interface 70 is used to connect to a waveform display device (not shown in the figure) to display the signal waveform of the signal pin S4 when the chip to be calibrated 40 is in test mode.

[0092] As described above, after adjusting the resistance value of the calibration resistor module 32 to the target resistance value, the chip 40 to be calibrated can undergo internal resistance calibration. The calibration process mainly relies on the voltage flipping recognition of the internal comparator. It can be understood that if the internal resistance calibration is successful, each signal pin of the chip 40 to be calibrated will transmit communication signals according to the expected signal waveform. Conversely, if the internal resistance calibration fails, the signal waveform of the signal pins of the chip 40 to be calibrated when transmitting communication signals will inevitably be different from the ideal signal waveform. In other words, the success of the internal resistance calibration can be intuitively determined based on the signal waveform of the signal pins of the chip 40 to be calibrated. Based on this, the calibration auxiliary device provided in this embodiment also includes a test interface 70, which is connected to a waveform display device, such as an oscilloscope. When performing internal resistance calibration of the chip 40 to be calibrated, the chip 40 outputs a communication signal through signal pin S4. The tester can then intuitively observe the signal waveform of the signal pin through the waveform display device, thereby monitoring the calibration process and helping to improve the calibration effect and the reliability of the calibration results.

[0093] The following is based on Figure 4Based on the calibration auxiliary device provided in the illustrated embodiment, two optional implementation methods for auxiliary calibration modules are provided, and the specific working process of internal resistance calibration using the corresponding calibration auxiliary device is described in detail.

[0094] See Figure 5 As shown, the auxiliary calibration module 33 provided in this embodiment includes: a constant voltage source module 331, a standard resistor R0, and a controllable switch K1.

[0095] Specifically, the output terminal of the constant voltage source module 331 is connected to one end of the standard resistor R0, and the other end of the standard resistor R0 is connected to the input terminal of the controllable switch K1. The output terminal of the controllable switch K1 serves as the output terminal of the auxiliary calibration module 33 and is connected to the first terminal of the calibration resistor module 32. Based on the aforementioned connection relationship, it can be seen that the constant voltage source module 331, the standard resistor R0, the controllable switch K1, and the calibration resistor module 32 are connected in series, and finally the second terminal of the calibration resistor module 32 is grounded. The controlled terminal of the controllable switch K1 serves as the controlled terminal of the auxiliary calibration module 33 and is connected to the second control terminal C2 of the main control module. Furthermore, the power supply terminal of the constant voltage source module 331 serves as the power supply terminal D3 of the auxiliary calibration module and is connected to the second output terminal A2 of the power supply module 60. The power supply module 60 provides the operating voltage required for the operation of the constant voltage source module 331, and the calibration current provided by the constant voltage source module 331 serves as the calibration electrical signal for the auxiliary calibration module 33.

[0096] Based on the above connection relationship, when calibrating the resistance of the calibration resistor module 32, the main control module 31 outputs a second control signal. The controllable switch K1 responds to the second control signal and conducts, outputting the calibration current provided by the constant voltage source module 331. As mentioned above, the standard resistor R0 and the calibration resistor module 32 are connected in series to form a voltage divider circuit. The voltage division ratio of this circuit is determined by the resistance value of the standard resistor R0 and the actual resistance value of the calibration resistor module 32. Therefore, the target voltage division ratio can be determined based on the ratio of the resistance value of the standard resistor to the target resistance value. Specifically, assuming the resistance value of the standard resistor R0 is Rb and the target resistance value is Rs, then the target voltage division ratio Ks = Rs / (Rb + Rs). Furthermore, the product of the output voltage of the constant voltage source module 331 and the target voltage division ratio is the target voltage. In practical applications, the output voltage of the constant voltage source module 331 and the resistance value of the standard resistor R0 are known. After determining the target resistance value of the calibration resistor module 32, the main control module 31 can determine and store the target voltage based on the above voltage division ratio and the output voltage of the constant voltage source module 331.

[0097] The calibration resistor module 32 generates a feedback voltage in response to the calibration current output by the auxiliary calibration module 33, which corresponds to the actual resistance value of the calibration resistor module 32. Based on this, the main control module 31 obtains the feedback voltage through the ADC module 34. If the feedback voltage is consistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be the target resistance value. Conversely, if the feedback voltage is inconsistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be different from the target resistance value, and a first control signal needs to be output to adjust the actual resistance value of the calibration resistor module 32 to the target resistance value.

[0098] As for the connections and functions of the other components in the calibration auxiliary device, please refer to the relevant content of the foregoing embodiments, which will not be repeated here.

[0099] The following details the use of Figure 5 The auxiliary calibration device provided in the illustrated embodiment is used to calibrate the internal resistance of the chip to be calibrated.

[0100] S11. Establish the connection between the power supply module 60 and the external power supply. The power supply module 60 starts running, converting the power supply voltage of the external power supply into the operating voltage that matches the relevant modules in the auxiliary calibration device. The clock module 50 and the main control module 31 and constant voltage source module 331 in the resistance adjustment module 30 are powered on. As mentioned earlier, when a digital potentiometer is selected for the calibration resistor module 32, the power supply terminal of the digital potentiometer is also connected to the second output terminal A2 of the power supply module 60, and it runs under the drive of the power supply module 60.

[0101] S12, the clock module 50 starts running in response to the working voltage provided by the power supply module 50, and directly provides a clock signal to the main control module 31 through the second output terminal B2, and the main control module 31 starts running.

[0102] S13. The main control module 31 outputs the first control signal according to the user configuration information and adjusts the resistance of the calibration resistor module 32 to the target resistance value (the actual resistance value of the calibration resistor module 32 may not reach the target resistance value).

[0103] S13. Use the auxiliary calibration module 33 to calibrate the resistance value of the calibration resistor module 32.

[0104] S131, the main control module 31 outputs a second control signal through the second control terminal C2. The controllable switch K1 is turned on in response to the second control signal. The constant voltage source module 331 outputs a calibration current through the standard resistor R0 and the controllable switch K1. The calibration resistor module 32 generates a feedback voltage in response to the calibration current. Based on the aforementioned content, it can be known that the output voltage of the constant voltage source module 32 will be divided by the voltage divider circuit formed by the standard resistor R0 and the calibration resistor module 32. The voltage at the first terminal of the calibration resistor module 32 is the feedback voltage. The main control module 31 obtains the feedback voltage through the ADC module 34 and the sampling terminal C3 and compares it with the target voltage (the process of determining the target voltage can be found in the aforementioned content and will not be repeated here). If the feedback voltage is consistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be the target resistance value. Conversely, if the feedback voltage is inconsistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be not the target resistance value, and a first control signal needs to be output to adjust the actual resistance value of the calibration resistor module 32 to the target resistance value.

[0105] S132. After calibration is completed, the main control module 31 controls the controllable switch K1 to turn off, bypassing the auxiliary calibration module 33 to avoid affecting the subsequent chip calibration process.

[0106] S14. Insert the chip 40 to be calibrated into the chip base 20.

[0107] S15, the main control module 31 outputs a power supply enable signal through the fourth control terminal C7, and controls the power supply module 60 to provide working voltage to the chip 40 to be calibrated through the first output terminal so that the chip 40 to be calibrated is powered on.

[0108] S16, the main control module 31 outputs a third control signal through the third control terminal C5, and the control clock module 50 provides a clock signal to the chip 40 to be calibrated through the first output terminal B1.

[0109] S17. The main control module 31 outputs a reset signal to the reset pin of the chip 40 to be calibrated via the fifth control terminal C8, so that the chip 40 to be calibrated performs a preset reset operation in response to the reset signal. The chip 40 to be calibrated operates based on a clock signal and can acquire the calibration voltage of the calibration resistor module 32 to perform the internal resistance calibration process described above.

[0110] As an optional operation, the main control module 31 sends a test signal to the test pin S6 of the chip to be calibrated 40 through the sixth control terminal C9, so that the chip to be calibrated 40 generates a test waveform. The tester can then visually observe the signal waveform of the signal pin through the waveform display device, thereby monitoring the calibration process and helping to improve the calibration effect and the reliability of the calibration results.

[0111] Further, see Figure 6As shown, the auxiliary calibration module 33 provided in this embodiment includes: a constant current source module 332 and a controllable switch K1.

[0112] Specifically, the output terminal of the constant current source module 332 is connected to the input terminal of the controllable switch K1. The output terminal of the controllable switch K1 serves as the output terminal of the auxiliary calibration module 33 and is connected to the first terminal of the calibration resistor module 32. Based on the aforementioned connection relationship, the constant current source module 332, the controllable switch K1, and the calibration resistor module 32 are connected in series, and finally the second terminal of the calibration resistor module 32 is grounded. The controlled terminal of the controllable switch K1 serves as the controlled terminal D2 of the auxiliary calibration module 33 and is connected to the second control terminal C2 of the main control module 31. Furthermore, the power supply terminal of the constant current source module 332 serves as the power supply terminal D3 of the auxiliary calibration module 33 and is connected to the second output terminal A2 of the power supply module 60. The power supply module 60 provides the operating voltage required for the operation of the constant current source module 332, and the calibration current provided by the constant current source module 332 serves as the calibration electrical signal for the auxiliary calibration module 33.

[0113] Based on the above connection relationship, when calibrating the resistance of the calibration resistor module 32, the main control module 31 outputs a second control signal. The controllable switch K1 responds to the second control signal and turns on, outputting the calibration current provided by the constant current source module 332. The calibration current flows through the calibration resistor module 32, and the calibration resistor module 32 generates a feedback voltage. Furthermore, the specific value of the calibration current output by the constant current source module 332 is known, the target resistance value of the calibration resistor module 32 is known, and the product of the calibration current and the target resistance value is the target voltage.

[0114] The calibration resistor module 32 responds to the feedback voltage generated by the calibration current, which corresponds to the actual resistance value of the calibration resistor module 32. Based on this, the main control module 31 obtains the feedback voltage through the ADC module 34. If the feedback voltage is consistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be the target resistance value. Conversely, if the feedback voltage is inconsistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be not the target resistance value, and a first control signal needs to be output to adjust the actual resistance value of the calibration resistor module 32 to the target resistance value.

[0115] As for the connections and functions of the other components in the calibration auxiliary device, please refer to the relevant content of the foregoing embodiments, which will not be repeated here.

[0116] The following details the use of Figure 6 The auxiliary calibration device provided in the illustrated embodiment is used to calibrate the internal resistance of the chip to be calibrated.

[0117] S21. Establish the connection between the power supply module 60 and the external power supply. The power supply module 60 starts running, converting the power supply voltage of the external power supply into the operating voltage matching the relevant modules in the auxiliary calibration device. The clock module 50 and the main control module 31 and constant current source module 332 in the resistance adjustment module 30 are powered on. As mentioned earlier, when a digital potentiometer is selected for the calibration resistor module 32, the power supply terminal of the digital potentiometer is also connected to the second output terminal A2 of the power supply module 60, and it runs under the drive of the power supply module 60.

[0118] S22, the clock module 50 starts running in response to the working voltage provided by the power supply module 60, and directly provides a clock signal to the main control module 31 through the second output terminal B2, and the main control module 31 starts running.

[0119] S23. The main control module 31 outputs the first control signal according to the user configuration information and adjusts the resistance of the calibration resistor module 32 to the target resistance value (the actual resistance value of the calibration resistor module 32 may not reach the target resistance value).

[0120] S23. Use the auxiliary calibration module 33 to calibrate the resistance value of the calibration resistor module 32.

[0121] S231, the main control module 31 outputs a second control signal through the second control terminal C2. The controllable switch K1 is turned on in response to the second control signal. The constant current source module 332 outputs a calibration current through the controllable switch K1. The calibration resistor module 32 generates a feedback voltage in response to the calibration current. The main control module 31 obtains the feedback voltage through the ADC module 34 and the sampling terminal C3 and compares it with the target voltage (the process of determining the target voltage can be found in the previous content and will not be repeated here). If the feedback voltage is consistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be the target resistance value. Conversely, if the feedback voltage is inconsistent with the target voltage, the actual resistance value of the calibration resistor module 32 is determined to be not the target resistance value. It is necessary to further output a first control signal to adjust the actual resistance value of the calibration resistor module 32 to the target resistance value.

[0122] S232. After calibration is completed, the main control module 31 controls the controllable switch K1 to turn off, bypassing the auxiliary calibration module 33 to avoid affecting the subsequent chip calibration process.

[0123] S24. Insert the chip 40 to be calibrated into the chip base 20.

[0124] S25, the main control module 31 outputs a power supply enable signal through the fourth control terminal C7, and controls the power supply module 60 to provide working voltage to the chip 40 to be calibrated through the first output terminal so that the chip 40 to be calibrated is powered on.

[0125] S26, the main control module 31 outputs a third control signal through the third control terminal C5, and the control clock module 50 provides a clock signal to the chip 40 to be calibrated through the first output terminal B1.

[0126] S27. The main control module 31 outputs a reset signal to the reset pin of the chip 40 to be calibrated via the fifth control terminal C8, so that the chip 40 to be calibrated performs a preset reset operation in response to the reset signal. The chip 40 to be calibrated operates based on a clock signal and can acquire the calibration voltage of the calibration resistor module 32 to perform the internal resistance calibration process described above.

[0127] As an optional operation, the main control module 31 sends a test signal to the test pin S6 of the chip to be calibrated 40 through the sixth control terminal C9, so that the chip to be calibrated 40 generates a test waveform. The tester can then visually observe the signal waveform of the signal pin through the waveform display device, thereby monitoring the calibration process and helping to improve the calibration effect and the reliability of the calibration results.

[0128] Those skilled in the art will understand that the contents disclosed herein can be varied and modified in many ways. For example, the various devices or components described above can be implemented in hardware, or in software, firmware, or a combination of some or all of the three.

[0129] Furthermore, while this disclosure makes various references to certain elements of systems according to embodiments of this disclosure, any number of different elements may be used and operated on clients and / or servers. Elements are merely illustrative, and different aspects of the system and method may use different elements.

[0130] Those skilled in the art will understand that all or part of the steps in the above methods can be executed by a computer program requesting relevant hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the above embodiments can be implemented in hardware or as a software functional module. This disclosure is not limited to any particular combination of hardware and software.

[0131] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0132] The foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present disclosure is defined by the claims and their equivalents.

Claims

1. A calibration auxiliary device, characterized in that, include: A substrate, a chip mount disposed on the substrate, and a resistance adjustment module, wherein, The chip base is pin-adapted to the chip to be calibrated and is used to mount the chip to be calibrated. The resistance adjustment module includes: a main control module and a calibration resistor module, wherein... The first end of the calibration resistor module is connected to the calibration pin of the chip to be calibrated via the chip base, and the second end of the calibration resistor module is grounded. The first control terminal of the main control module is connected to the controlled terminal of the calibration resistor module, and outputs a first control signal to the calibration resistor module. The first control signal is used to adjust the resistance value of the calibration resistor module to the target resistance value.

2. The calibration auxiliary device according to claim 1, characterized in that, The resistance adjustment module further includes an auxiliary calibration module, wherein... The output terminal of the auxiliary calibration module is connected to the first terminal of the calibration resistor module; The second control terminal of the main control module is connected to the controlled terminal of the auxiliary calibration module, and outputs a second control signal to the auxiliary calibration module. The second control signal is used to control the auxiliary calibration module to output a calibration electrical signal. The calibration resistor module generates a feedback voltage in response to the calibration electrical signal; The sampling terminal of the main control module is connected to the first terminal of the calibration resistor module to collect the feedback voltage; The first control signal is determined based on the deviation between the feedback voltage and the target voltage, and the target voltage is determined based on the calibration electrical signal and the target resistance value.

3. The calibration auxiliary device according to claim 2, characterized in that, The auxiliary calibration module includes: a constant current source module and a controllable switch, wherein, The output terminal of the constant current source module is connected to the input terminal of the controllable switch; The output terminal of the controllable switch serves as the output terminal of the auxiliary calibration module. The controlled terminal of the controllable switch serves as the controlled terminal of the auxiliary calibration module; The controllable switch is turned on in response to the second control signal to output the calibration current provided by the constant current source module; The calibration resistor module generates the feedback voltage in response to the calibration current, and the target voltage is the product of the calibration current and the target resistance value.

4. The calibration auxiliary device according to claim 2, characterized in that, The auxiliary calibration module includes: a constant voltage source module, a standard resistor, and a controllable switch, wherein, The output terminal of the constant voltage source module is connected to one end of the standard resistor, and the other end of the standard resistor is connected to the input terminal of the controllable switch. The output terminal of the controllable switch serves as the output terminal of the auxiliary calibration module. The controlled terminal of the controllable switch serves as the controlled terminal of the auxiliary calibration module; The controllable switch is turned on in response to the second control signal to output the calibration current provided by the constant voltage source module; The calibration resistor module generates the feedback voltage in response to the calibration current. The target voltage is the product of the target voltage division ratio and the output voltage of the constant voltage source module. The target voltage division ratio is determined based on the resistance value of the standard resistor and the target resistance value.

5. The calibration auxiliary device according to claim 2, characterized in that, The resistance adjustment module further includes: an analog-to-digital conversion module, wherein... The input terminal of the analog-to-digital converter module is connected to the first terminal of the calibration resistor module, and the output terminal of the analog-to-digital converter module is connected to the sampling terminal of the main control module. The analog-to-digital converter module is used to convert analog feedback voltage into digital feedback voltage.

6. The calibration auxiliary device according to claim 1, characterized in that, Also includes: The clock module is disposed on the substrate, wherein... The first output terminal of the clock module is connected to the clock pin of the chip to be calibrated via the chip base; The second output terminal of the clock module is connected to the clock input terminal of the main control module, so as to provide a clock signal to the main control module through the second output terminal; The third control terminal of the main control module is connected to the controlled terminal of the clock module and outputs a clock enable signal to the clock module. The clock enable signal is used to enable the clock module to provide a clock signal to the chip to be calibrated through the first output terminal.

7. The calibration auxiliary device according to claim 6, characterized in that, Also includes: The power supply module is disposed on the substrate, wherein... The input terminal of the power supply module is used to receive the power supply voltage; The first output terminal of the power supply module is connected to the power pin of the chip to be calibrated via the chip base; The second output terminal of the power supply module is connected to the power supply terminals of the resistor adjustment module and the clock module, respectively. The power supply module is used to convert the power supply voltage into an operating voltage that is compatible with the chip to be calibrated, the clock module, and the resistor adjustment module.

8. The calibration auxiliary device according to claim 7, characterized in that, The fourth control terminal of the main control module is connected to the controlled terminal of the power supply module, and outputs a power supply enable signal to the power supply module. The power supply enable signal is used to enable the power supply module to output a working voltage to the chip to be calibrated through the first output terminal.

9. The calibration auxiliary device according to claim 1, characterized in that, Also includes: The test interface is disposed on the substrate, wherein... The input end of the test interface is connected to the signal pin of the chip to be calibrated via the chip base, and the output end of the test interface is used to connect to a waveform display device, which is used to display the signal waveform of the signal pin when the chip to be calibrated is in test mode.

10. The calibration auxiliary device according to any one of claims 1 to 9, characterized in that, The calibration resistor module includes a digital potentiometer.

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