A test fixture for testing power-up timing
By testing the power-on timing test module and main control module of the power-on timing fixture, parallel and rapid testing of multiple signals from the camera chip was achieved, solving the problems of low testing efficiency and inability to synchronously monitor timing in existing technologies, and improving the automation and accuracy of testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNSHANSHAN TITANIUM ZHIXING ZHIYUAN TECHNOLOGY CO LTD
- Filing Date
- 2026-04-02
- Publication Date
- 2026-05-29
Smart Images
Figure CN122109791A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of power-on testing technology, and specifically relates to a fixture for testing power-on timing. Background Technology
[0002] Currently, camera chips require multiple power supplies and signals to be powered on sequentially at strict time intervals to ensure proper chip initialization. In existing technology, test engineers must verify the power-on timing sequence of the configured fixture using an oscilloscope: for each fixture, the test environment must be manually set up, probes connected, and waveforms captured one by one using an oscilloscope. However, this method cannot achieve rapid parallel verification when multiple fixtures require timing testing simultaneously, and it is difficult to simultaneously monitor all critical power and signal timings in a single test, resulting in low testing efficiency, cumbersome operation, and an inability to meet the demands of efficient production testing. Summary of the Invention
[0003] In view of the above problems, embodiments of this application provide a fixture for testing power-on timing, so as to overcome the above problems or at least partially solve the above problems.
[0004] In a first aspect, this application provides a fixture for testing power-on timing, comprising: a power-on timing test module and a main control module, wherein the main control module and the power-on timing test module are electrically connected; the power-on timing test module is configured to be electrically connected to a fixture under test (DUT) and to receive multiple test signals from the DUT; the main control module is configured to, in response to a test start command, send a first reference voltage signal and a second reference voltage signal corresponding to each test signal to the power-on timing test module; wherein the voltage value of the first reference voltage signal is greater than the voltage value of the second reference voltage signal; the power-on timing test module is further configured to compare the voltage value of each test signal with the voltage values of the corresponding first reference voltage signal and the second reference voltage signal, and output the comparison result to the main control module; the main control module is further configured to record the time point of level transition of each test signal according to the comparison result, and generate the power-on timing of the multiple test signals of the DUT.
[0005] In some embodiments, the power-on timing test module includes multiple sets of comparison channels, each set of comparison channels corresponding to one test signal, and each set of comparison channels includes a high-level comparison unit and a low-level comparison unit; wherein, the first input and output terminals of the high-level comparison unit are electrically connected to the main control module, and the second input terminal of the high-level comparison unit is configured to be electrically connected to the output terminal of the corresponding test signal in the fixture under test; the first input and output terminals of the low-level comparison unit are electrically connected to the main control module, and the second input terminal of the low-level comparison unit is configured to be electrically connected to the output terminal of the corresponding test signal in the fixture under test; the high-level comparison unit is configured to connect the fixture under test to the test signal. The first voltage value of one output test signal is compared with the second voltage value of the corresponding first reference voltage signal. When the first voltage value is greater than or equal to the second voltage value, a high-level valid signal is output to the main control module. The low-level comparison unit is configured to compare the first voltage value of one output test signal of the fixture under test with the third voltage value of the corresponding second reference voltage signal. When the first voltage value is less than or equal to the third voltage value, a low-level valid signal is output to the main control module. The main control module is configured to determine the time point of the level transition of the multiple test signals based on the high-level valid signal and the low-level valid signal, and generate the power-on timing sequence.
[0006] In some embodiments, there are more than four comparison channels.
[0007] In some embodiments, the main control module is further configured to match the comparison result with the preset level transition direction corresponding to each of the multiple test signals; wherein the preset level transition direction includes a direction from low level to high level or a direction from high level to low level; and when the comparison result is consistent with the preset level transition direction, the time point when the level transition of the test signal occurs is recorded.
[0008] In some embodiments, the main control module is further configured to detect whether the multiple test signals undergo a level transition within a preset time period. If any test signal does not undergo a level transition, the test signal that did not undergo a level transition is determined to have failed to power on, and the test is terminated.
[0009] In some embodiments, the fixture further includes a test button and an interrupt button, the test button and the interrupt button being electrically connected to the main control module respectively; wherein, the test button is configured to issue the test start command in response to a user's trigger operation; the interrupt button is configured to issue an interrupt test command in response to a user's interrupt operation; the main control module is also configured to terminate the test in response to the interrupt test command.
[0010] In some embodiments, the fixture further includes a setting button; the setting button is configured to adjust the setting values of the first reference voltage signal and the second reference voltage signal corresponding to each of the multiple test signals in response to a user's adjustment operation, and transmit the setting values to the main control module; the main control module is further configured to receive and store the adjusted setting values, and output the adjusted setting values to the power-on timing test module during the test.
[0011] In some embodiments, the fixture for testing the power-on sequence further includes: a power-on indicator light, electrically connected to the main control module, wherein the main control module is further configured to control the power-on indicator light to illuminate in response to a user's trigger operation; and a setting indicator light, electrically connected to the main control module, wherein the main control module is further configured to control the setting indicator light to illuminate in response to a user's adjustment operation.
[0012] In some embodiments, the fixture for testing the power-on sequence further includes a tooling display screen electrically connected to the main control module, wherein the main control module is further configured to control the tooling display screen to display the power-on sequence.
[0013] In some embodiments, the fixture for testing the power-on sequence further includes a sound module electrically connected to the main control module; the main control module is further configured to control the sound module to emit a prompt sound when the test fixture is completed.
[0014] The power-on timing test fixture provided in this embodiment includes a power-on timing test module and a main control module, which are electrically connected. The power-on timing test module is configured to be electrically connected to the fixture under test (DUT) and receive multiple test signals from the DUT. In response to a test start command, the main control module sends a first reference voltage signal and a second reference voltage signal corresponding to each test signal to the power-on timing test module, wherein the voltage value of the first reference voltage signal is greater than the voltage value of the second reference voltage signal. The power-on timing test module can also compare the voltage value of each test signal with the voltage value of the corresponding first reference voltage signal and the voltage value of the second reference voltage signal. The voltage value of the reference voltage signal is compared, and the comparison result is output to the main control module. The main control module then records the time point of the level transition of each test signal according to the comparison result, and generates the power-on timing sequence of the multiple test signals of the fixture under test. Therefore, based on the above configuration, the fixture does not need to repeatedly build a complex test environment for each fixture, and can realize parallel and rapid testing of multiple test signals. At the same time, since the level transition is directly captured by comparing the reference voltage, it is not limited by the number of signal channels, and can simultaneously monitor the timing relationship of all power supply and control signals at one time, thereby effectively solving the problems of low test efficiency and inability to comprehensively monitor the timing sequence of multiple signals in the prior art. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a functional block diagram of a fixture for testing power-on timing provided in an embodiment of this application; Figure 2 This is a schematic diagram of a power-on timing test module provided in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the determination of the power-on timing of DOVDD according to an embodiment of this application; Figure 4 This is a schematic diagram illustrating how to determine the power-on timing of an SCL according to an embodiment of this application; Figure 5 This is a functional block diagram of another fixture for testing power-on timing provided in the embodiments of this application; Figure 6 This is a schematic diagram of a fixture provided in an embodiment of this application; Figure 7 This is a schematic diagram of an interface without a second voltage value and a third voltage value provided in an embodiment of this application; Figure 8 It is aimed at Figure 7 A schematic diagram of an interface for setting a second voltage value and a third voltage value is provided; Figure 9 This is a power-on timing diagram of a tooling display screen provided in an embodiment of this application. Detailed Implementation
[0017] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.
[0018] Figure 1 This is a functional block diagram of a fixture for testing power-on timing provided in an embodiment of this application. Figure 1It is known that the fixture for testing the power-on timing includes: a power-on timing test module and a main control module, the main control module and the power-on timing test module being electrically connected; the power-on timing test module is configured to be electrically connected to the fixture under test and receive multiple test signals from the fixture under test; the main control module is configured to, in response to a test start command, send a first reference voltage signal and a second reference voltage signal corresponding to each test signal to the power-on timing test module; wherein, the voltage value of the first reference voltage signal is greater than the voltage value of the second reference voltage signal; the power-on timing test module is further configured to compare the voltage value of each test signal with the voltage values of the corresponding first reference voltage signal and the second reference voltage signal, and output the comparison result to the main control module; the main control module is further configured to record the time point when the level of each test signal changes according to the comparison result, and generate the power-on timing of the multiple test signals of the fixture under test.
[0019] In this embodiment, the fixture under test is a camera module test box. Camera modules require multiple different voltages (such as core voltage, analog voltage, and I / O voltage) to function properly. The test box has a built-in power management circuit that can provide a precise power-on environment for the camera module according to the timing and voltage values required by the camera module's datasheet.
[0020] The power-on timing test module is an interface module for direct interaction with the fixture under test (DUT), receiving multiple test signals output by the DUT. These multiple test signals can include various power supply voltage signals, clock signals, reset signals, enable signals, and I2C communication signals output by the DUT during startup, reflecting the actual power-on behavior of the DUT. The power-on timing test module and the DUT can be connected via a connecting cable. A connecting cable is a flexible or flat cable used for signal transmission within or between electronic devices, typically composed of multiple parallel conductors. These conductors can respectively transmit various power supply voltage signals, clock signals, reset signals, enable signals, and I2C communication signals, ensuring that the fixture can synchronously receive all critical signals output by the DUT.
[0021] The power supply voltage signal is used to monitor the power-on sequence and stabilization time of each power supply rail; the clock signal is used to verify the setup time of the module's working clock; the reset signal and enable signal reflect the control timing of the module initialization process; and the I2C communication signal can be used to confirm whether the register configuration is completed within the correct timing window. By synchronously monitoring the above data test signals, the power-on timing test module can comprehensively monitor the complete power-on behavior of the fixture under test output to the camera module, ensuring that the power-on timing relationship of each signal meets the requirements of the module specification. Furthermore, the power-on timing test module integrates multiple sets of comparators, which can synchronously detect the power-on timing of multiple test signals. Each comparator is responsible for one test signal, outputting the corresponding level change by comparing the signal voltage with preset first and second reference voltages in real time. Based on these comparison results, the main control module can simultaneously record the transition time of each signal, thereby accurately generating the overall power-on timing relationship of multiple signals. During the specific testing process, the power-on timing test module compares the real-time acquired test signal voltage values with the corresponding first and second reference voltage values, and outputs the comparison results to the main control module in real time. In this embodiment, the first reference voltage signal can be used as the threshold for determining whether the test signal transitions from low to high. When the voltage value of the test signal is greater than or equal to the voltage value corresponding to the first reference voltage signal, it can be determined that the test signal is in a high-level state. The second reference voltage signal can be used as the threshold for determining whether the test signal transitions from high to low. When the voltage value of the test signal is less than or equal to the voltage value corresponding to the second reference voltage signal, it can be determined that the test signal is in a low-level state.
[0022] The comparison result refers to the real-time level status signal output by each comparison channel in the power-on timing test module. For a test signal, the high-level comparison unit compares its voltage value with the first reference voltage. When the test signal voltage value is greater than or equal to the first reference voltage, it outputs a high-level valid signal; otherwise, it outputs a low-level signal. The low-level comparison unit compares its voltage value with the second reference voltage. When the test signal voltage value is less than or equal to the second reference voltage, it outputs a low-level valid signal; otherwise, it outputs a high-level signal. By receiving these two comparison results in real time and combining them with the preset valid level polarity (high-level valid or low-level valid) of the signal, the main control module can accurately determine the moment when the valid level transition of the test signal occurs, thus providing a basis for the subsequent generation of the power-on timing sequence. The main control module, as the control core of the test fixture, is responsible for providing the reference voltage threshold corresponding to each test signal to the power-on timing test module. Specifically, in response to the test start command, the main control module configures a first reference voltage signal and a second reference voltage signal for each test signal. The voltage value of the first reference voltage signal is greater than the voltage value of the second reference voltage signal, which is used to define the level transition judgment range of the test signal. Based on the comparison results returned by the power-on timing test module, the main control module, combined with the preset effective level polarity (high level effective or low level effective) of each signal, can accurately determine the time when the level transition of each test signal occurs and record the corresponding time point. Level transition is a rapid switching process of a digital signal between a low voltage representing 0 and a high voltage representing 1. For example, the rising edge is the transition from low level (0) to high level (1), and the falling edge is the transition from high level (1) to low level (0).
[0023] Similarly, the determination of power-down or reset timing is based on the opposite direction of the level transition. The main control module has a built-in unified timing reference. Based on the changes in the received comparison results and the effective level polarity of each signal, it records the specific time point when the effective level transition of each test signal occurs. By summarizing the transition time points of each test signal, the main control module can generate a complete multi-channel test signal power-on sequence for the fixture under test, thereby achieving automated and parallel verification of the power-on sequence of the camera module test box and ensuring that its output power-on environment meets the requirements of the module specification.
[0024] Figure 2 This is a schematic diagram of a power-on timing test module provided in an embodiment of this application. Figure 2It is known that the power-on timing test module includes multiple sets of comparison channels, each set of comparison channels corresponding to one test signal, and each set of comparison channels includes a high-level comparison unit and a low-level comparison unit; wherein, the first input and output terminals of the high-level comparison unit are electrically connected to the main control module, and the second input terminal of the high-level comparison unit is configured to be electrically connected to the output terminal of the corresponding test signal in the fixture under test; the first input and output terminals of the low-level comparison unit are electrically connected to the main control module, and the second input terminal of the low-level comparison unit is configured to be electrically connected to the output terminal of the corresponding test signal in the fixture under test; the high-level comparison unit is configured to compare the test signal with the output terminal of the corresponding test signal in the fixture under test. The first voltage value of one test signal output by the fixture is compared with the second voltage value of the corresponding first reference voltage signal. When the first voltage value is greater than or equal to the second voltage value, a high-level valid signal is output to the main control module. The low-level comparison unit is configured to compare the first voltage value of one test signal output by the fixture under test with the third voltage value of the corresponding second reference voltage signal. When the first voltage value is less than or equal to the third voltage value, a low-level valid signal is output to the main control module. The main control module is configured to determine the time point of level transition of multiple test signals based on the high-level valid signal and the low-level valid signal, and generate a power-on sequence.
[0025] In this embodiment, multiple comparison channels are configured for the power-on timing test module, and each comparison channel independently has a high-level comparison unit and a low-level comparison unit. The high-level comparison unit and the low-level comparison unit simultaneously detect the level state of one test signal. Specifically, the high-level comparison unit is responsible for monitoring whether the test signal reaches or exceeds a first reference voltage (high threshold). When the test signal voltage value meets this condition, the high-level comparison unit outputs a high-level valid signal to the main control module, indicating that the signal has crossed the set high threshold. The low-level comparison unit is responsible for monitoring whether the test signal drops to or falls below a second reference voltage (low threshold). When the test signal voltage value meets this condition, the low-level comparison unit outputs a low-level valid signal to the main control module, indicating that the signal has crossed the set low threshold.
[0026] The main control module performs logical judgment on the comparison results based on the preset valid level polarity of each signal: for a high-level valid signal, the main control module takes the time when the high-level comparison unit outputs a valid signal as the time when the signal is powered on; for a low-level valid signal, the main control module takes the time when the low-level comparison unit outputs a valid signal as the time when the signal is powered on. If it is necessary to monitor the falling edge or power-down timing of the signal, the opposite is true.
[0027] Therefore, the main control module can accurately capture the moment when each test signal crosses the threshold boundary, and combine this with the effective level characteristics of the signal to accurately determine the actual power-on state change point of each signal, thereby generating a power-on sequence of multiple test signals that conforms to actual logic. This circuit structure realizes parallel monitoring of multiple signals and can flexibly adapt to signal types with different effective levels.
[0028] For example, the following will Figure 3 and Figure 4 right Figure 2 Taking DOVDD (Digital I / O Voltage) and SCL (Serial Clock Line) as examples, this embodiment will be used to illustrate the detection of multiple signals.
[0029] Figure 3 This is a schematic diagram illustrating the determination of the power-on timing of DOVDD according to an embodiment of this application. Figure 3 It can be seen that DOVDD is initially at a low level and is at a high level when powered on. The second voltage value of the first reference voltage signal corresponding to DOVDD is 1.96V, and the third voltage value of the second reference voltage signal is 0.84V. The power-on time of DOVDD can be taken as the level transition time of the high-level valid signal output by the high-voltage comparator unit, which is 2.721s.
[0030] Figure 4 This is a schematic diagram illustrating the determination of the power-on timing of the SCL according to an embodiment of this application. Figure 4 It can be seen that SCL is initially high level and low level when powered on. The second voltage value of the first reference voltage signal corresponding to SCL is 1.26V, and the third voltage value of the second reference voltage signal is 0.3V. The power-on time of DOVDD is taken as the level transition time of the low-level valid signal output by the low-voltage comparator unit, which is 3.389s.
[0031] from Figure 3 and Figure 4As can be seen, the fixture for testing power-on timing provided in this embodiment can automatically select the output result of the corresponding comparison unit as the basis for judging the power-on time based on the actual effective level polarity of each test signal. For high-level effective signals such as DOVDD, which are initially low and become high after power-on, the main control module uses the occurrence time of the high-level effective signal output by the high-level comparison unit as its power-on time point; for low-level effective signals such as SCL, which are initially high and become low after power-on, the main control module uses the occurrence time of the low-level effective signal output by the low-level comparison unit as its power-on time point. In this way, the fixture does not need to be additionally configured for different signal types or manually interpreted, and can complete the accurate timing capture of multiple mixed polarity signals in parallel in one test. This effectively solves the problem in traditional solutions that require separate measurements or manual conversion due to differences in the effective level of signals, further improving the automation and accuracy of power-on timing testing.
[0032] also, Figure 2 The test signals may also include AVDD (Analog Voltage): initial low level, power-on high level; DVDD (Digital Core Voltage): initial low level, power-on high level; XSHUTDOWN (Shutdown / Reset): initial low level, power-on high level; XVCLK (Crystal / External Clock): initial low level, power-on high level; SDA (Serial DataLine): initial high level, power-on low level. To obtain the power-on timing of AVDD, DVDD, XSHUTDOWN, XVCLK, and SDA, refer to... Figure 3 and Figure 4 The explanation will not be repeated in this embodiment. In addition, if the power-on timing test module is used, it is also necessary to test whether the initial state of the tool under test meets the requirements. The judgment feedback of the multiple test signals should be as follows: DOVDD is low, AVDD is low; DVDD is low, XSHUTDOWN is low; XVCLK is low; SDA is high; SCL is high. If the requirements are met, proceed to the next step; if the requirements are not met, the test ends and an alarm signal is issued.
[0033] In some embodiments, there are more than four comparison channels.
[0034] In this embodiment, by setting more than four comparison channels in the power-on timing test module, the fixture can simultaneously monitor the level transitions of more than four test signals. Compared to the limitation of traditional solutions where oscilloscopes can only capture four signals simultaneously, this fixture can flexibly configure the number of comparison channels according to actual test requirements, realizing parallel synchronous monitoring of all key signals output by the camera module test box, including multiple power supply voltage signals, clock signals, reset signals, enable signals, and I2C communication signals. Each comparison channel works independently without interference. The main control module uniformly receives the comparison results of all channels and records the time points, thereby completely capturing the global power-on timing of the fixture under test in one test. This effectively solves the problem of traditional methods requiring multiple measurements due to insufficient channel numbers, which cannot truly reflect the synchronous timing relationship of each signal.
[0035] In some embodiments, the main control module is further configured to match the comparison result with the preset level transition direction corresponding to each of the multiple test signals; wherein, the preset level transition direction includes the direction of transition from low level to high level or the direction of transition from high level to low level; when the comparison result is consistent with the preset level transition direction, the time point when the level transition of the test signal occurs is recorded.
[0036] In this embodiment, the main control module matches the comparison results with the preset level transition directions of each test signal, achieving precise selection of valid transition moments. Specifically, the main control module pre-configures the transition direction required for each test signal during its actual operation—for example, for a high-level active enable signal, the preset transition direction is from low to high; for a low-level active reset signal, the preset transition direction is from high to low. During the test, the main control module receives the comparison results returned by the power-on timing test module in real time. Only when the detected actual transition direction matches the preset direction is the time point when the level transition of the test signal occurs; transitions opposite to the preset direction (such as signal jitter or non-target edges) are not recorded. This configuration effectively avoids false triggering caused by signal glitches or irrelevant edge interference, ensuring that the main control module only captures valid transition moments that truly reflect the power-on or reset action, thereby improving the accuracy and reliability of the power-on timing test.
[0037] For example, combined Figure 3Taking the DOVDD test signal output from the camera module test box as an example, DOVDD initially starts at a low level and becomes high upon power-up. Its preset level transition direction is from low to high, meaning the effective power-up moment corresponds to the rising edge. During testing, the power-up timing test module monitors the DOVDD voltage value in real time and compares it with preset first reference voltage (1.96V) and second reference voltage (0.84V) through high-level and low-level comparison units, respectively. After receiving the comparison results, when the main control module detects that the DOVDD voltage value rises from below 0.84V and stabilizes above 1.96V, meaning the actual transition direction is consistent with the preset low-to-high direction, the main control module uses the level transition time of the high-level valid signal output by the high-level comparison unit (2.721s) as the DOVDD power-up time. Through this method, the main control module accurately captures the effective transition moment when the DOVDD signal truly completes power-up, ensuring that the final generated power-up timing accurately reflects the actual stable establishment time of the voltage.
[0038] In some embodiments, the main control module is further configured to detect whether multiple test signals have undergone level transitions within a preset time period. If any test signal does not undergo a level transition, the test signal that did not undergo a level transition is determined to have failed to power on, and the test is terminated.
[0039] In this embodiment, the preset time period can be pre-set according to the specifications of the tooling under test, typically covering the maximum power-on time window defined in the module specification. After the test starts, the main control module begins timing and monitors the comparison results returned by the power-on timing test module in real time. If, within the preset time period, a certain test signal fails to show a level transition consistent with its preset transition direction, the main control module determines that the signal has failed to power on and immediately terminates the current test process. This effectively avoids the problem of infinite test waiting caused by abnormalities or poor connections of the tooling under test, and also prevents misjudgments or equipment damage that may occur if subsequent tests are continued when some signals have failed to power on.
[0040] For example, combined Figure 3 Taking the DOVDD test signal output from the camera module test box as an example. Assume the module specification defines a maximum power-on time window of 3.0 seconds for DOVDD, meaning DOVDD must complete the transition from low to high level within 3.0 seconds of test initiation. The main control module starts timing after test initiation and monitors the DOVDD comparison result returned by the power-on timing test module in real time. For example... Figure 3As shown, the actual transition time of DOVDD is 2.721 seconds, which is within the preset time period (3.0 seconds). The main control module detects that the transition direction is consistent with the preset low-to-high direction, determines that the circuit is successfully powered on, and records the time. If, during the test, due to an abnormal fixture under test or poor contact of the connecting cable, the DOVDD signal fails to show a valid low-to-high transition within 3.0 seconds, the main control module determines that the DOVDD power-on has failed and immediately terminates the current test process, no longer waiting for or monitoring other signals. Through this configuration, this fixture can quickly locate the signal of power-on failure and terminate the test in a timely manner, avoiding misjudgments or equipment damage that may be caused by abnormal fixtures occupying test resources for a long time or continuing to test when some signals are abnormal, effectively improving test efficiency and safety.
[0041] In some embodiments, Figure 5 This is a functional block diagram of another fixture for testing power-on timing provided in the embodiments of this application. Figure 5 It is known that the fixture also includes a test button and an interrupt button, which are electrically connected to the main control module. The test button is configured to issue a test start command in response to a user's trigger operation; the interrupt button is configured to issue an interrupt test command in response to a user's interrupt operation; the main control module is also configured to terminate the test in response to the interrupt test command.
[0042] In this embodiment, Figure 6 This is a schematic diagram of a fixture provided in an embodiment of this application, combined with... Figure 5 and Figure 6 It is known that the fixture includes a main control board and external modules electrically connected to the main control board. The main control board integrates a main control module, a power-on timing test module, a power supply module, a button driver module, an indicator light driver module, a sound driver module, and a fixture display screen driver module. The main control module, as the core control unit, is electrically connected to each driver module and the power-on timing test module. The power-on timing test module is electrically connected to the fixture under test (DUT) via a connecting cable and is used to receive multiple test signals output by the DUT.
[0043] The button driver module is electrically connected to the test button, interrupt button, and setting button, respectively, and is used to collect user button operations and transmit them to the main control module. For example... Figure 6As shown, the test button, interrupt button, and setting button are all mechanical buttons located on the fixture panel and triggered by physical pressing. In other implementations, these buttons can also be virtual buttons implemented through a graphical interface of the host computer software. The indicator light driver module is electrically connected to the power-on indicator light and the setting indicator light, and is used to control the indicator lights to turn on and off according to the instructions of the main control module. The sound driver module is electrically connected to the sound module, and is used to emit a prompt tone when the test is completed. The fixture display screen driver module is electrically connected to the fixture display screen, and is used to drive the display screen to display the test results of the power-on sequence. The power supply module is electrically connected to an external power supply, providing working power to each module of the fixture. With the above structure, the fixture realizes automated testing and result display of the power-on sequence of the camera module test box.
[0044] Continue to refer to Figure 5 and Figure 6 The fixture also includes a setting button; the setting button is configured to respond to the user's adjustment operation, adjust the setting values of the first reference voltage signal and the second reference voltage signal corresponding to each of the multiple test signals, and transmit the setting values to the main control module; the main control module is also configured to receive and store the adjusted setting values, and output the adjusted setting values to the power-on timing test module during the test.
[0045] In this embodiment, the setting button can be a mechanical button or a virtual button, used to flexibly configure the reference voltage threshold. By operating the setting button, the user can independently adjust the set values of the corresponding first and second reference voltage signals for each test signal to adapt to the threshold requirements in different camera module specifications or the judgment needs of different signal types. After adjustment, the set values are transmitted to the main control module, which receives and stores these adjusted set values and outputs them to the power-on timing test module during subsequent testing as a basis for comparison and judgment. For example, Figure 6The tooling display screen has the following buttons: ○ button: Press and hold for 3 seconds to enter the setting state; a short press in the setting state confirms the selection of the second and third voltage values to be modified and saves the modified values; < button: Moves the cursor to the left in the setting state, selecting the position to the left when setting the second and third voltage values; > button: Moves the cursor to the right in the setting state, selecting the position to the right when setting the second and third voltage values; ∨ button: Moves the cursor down in the setting state, adjusting the value downwards when setting the second and third voltage values; ∧ button: Moves the cursor up in the setting state, adjusting the value upwards when setting the judgment voltage. Power / Signal: Displays the name of the power / signal; the cursor cannot select. The third voltage value displays the corresponding power / signal low-level detection voltage. Move the cursor to the corresponding voltage and press the ○ button to modify it. The second voltage value displays the corresponding power / signal high-level detection voltage. Move the cursor to the corresponding voltage and press the ○ button to modify it. Test Required: Displays whether the corresponding power / signal needs to be tested. Move the cursor to the corresponding position and press the ○ button to modify it. Save Settings: Move the cursor to
Save Settings
[0046] Figure 7 This is a schematic diagram of an interface without a second voltage value and a third voltage value provided in an embodiment of this application. Figure 8 It is aimed at Figure 7 A schematic diagram of an interface for setting a second voltage value and a third voltage value is provided. Figure 7 and Figure 8 As can be seen, by setting the buttons, users can independently configure the corresponding first reference voltage (high-level threshold) and second reference voltage (low-level threshold) for each test signal in the graphical interface. For example... Figure 8 As shown, the user set a low-level threshold of 0.300V and a high-level threshold of 1.260V for DOVDD; a low-level threshold of 0.840V and a high-level threshold of 1.960V for AVDD; a low-level threshold of 0.360V and a high-level threshold of 0.840V for DVDD; and corresponding thresholds for XSHUTDOWN, XVCLK, and SDA. The user also selected the signals to be tested using the "Whether to Test" option. After configuration, the user clicked "Save Settings," and the settings were transmitted to the main control module for storage and used as a basis for comparison in subsequent tests. Through this interface, users can quickly adapt to different camera modules without modifying the firmware, achieving flexible configuration of the reference voltage thresholds.
[0047] Continue to refer to Figure 5 and Figure 6The fixture for testing the power-on sequence also includes: a power-on indicator light, electrically connected to the main control module, which is also configured to control the power-on indicator light to illuminate in response to a user's trigger operation; and a setting indicator light, electrically connected to the main control module, which is also configured to control the setting indicator light to illuminate in response to a user's adjustment operation.
[0048] In this embodiment, the power-on indicator and the setting indicator are used to provide the user with intuitive feedback on the fixture's working status. The power-on indicator is electrically connected to the main control module. When the user triggers the test start command via the test button, the main control module responds to the command by controlling the power-on indicator to light up while starting the power-on sequence test process, indicating to the user that the fixture has entered the test working state. The setting indicator is also electrically connected to the main control module. When the user adjusts the reference voltage setting value via the setting button and completes the parameter configuration, the main control module responds to the adjustment operation by controlling the setting indicator to light up, indicating that the setting value has been successfully received and stored.
[0049] By setting power-on and setting indicator lights, users can monitor the fixture's current operating status in real time. A lit power-on indicator light indicates that testing has started, while a lit setting indicator light indicates that parameters are being configured. This effectively avoids misoperation or repeated triggering due to unclear status, enhancing the fixture's usability in production line debugging and R&D testing scenarios. Indicator lights can be implemented using physical LEDs or virtual icons in the host computer interface to adapt to the interaction needs of different usage environments.
[0050] Continue to refer to Figure 5 The fixture for testing the power-on sequence also includes a tooling display screen, which is electrically connected to the main control module. The main control module is also configured to control the tooling display screen to display the power-on sequence.
[0051] In this embodiment, the fixture display screen is electrically connected to the main control module and is used to intuitively display the test results of the power-on timing sequence to the user. After the main control module records the level transition times of multiple test signals and generates the power-on timing sequence, it controls the fixture display screen to present the timing data in a visual manner. The content that the display screen can display includes, but is not limited to: the name of each test signal, the preset effective level polarity, the actual transition time (absolute time or offset time relative to the trigger point), the time difference between each signal, and the pass / fail judgment result for whether it meets the specifications. Furthermore, the fixture display screen can also graphically present the timing relationship of each signal in waveform form, making it easy for testers to quickly identify whether the power-on sequence and time interval meet expectations.
[0052] By configuring the tooling display screen, users can directly obtain power-on timing test results on-site without connecting to a host computer or using an oscilloscope. Figure 9 This is a power-on timing diagram displayed on a tooling display screen according to an embodiment of this application. From Figure 9 As can be seen, the tooling display screen clearly presents the configuration parameters and test results of each test signal in a table format. The display screen lists seven signals: DOVDD, AVDD, DVDD, XSHUTDOWN, XVCLK, SDA, and SCL. Each signal displays the set low-level threshold (second reference voltage) and high-level threshold (first reference voltage), and the "Test Status" column indicates whether the signal participates in the timing test. At the same time, the display screen directly displays the power-on time points of each signal recorded by the main control module, such as DOVDD 2.721s, AVDD 2.581s, DVDD 2.916s, XSHUTDOWN 3.056s, XVCLK 3.201s, SDA 4.389s, and SCL 5.389s. This interface allows users to intuitively obtain the actual power-on time of each signal, enabling them to quickly determine the power-on sequence (e.g., AVDD powering on before DOVDD) without the need for an oscilloscope. Furthermore, testers can compare the power-on time intervals of each power supply / signal with the specifications to confirm whether the current fixture power-on meets the requirements. If it does, the fixture power-on timing configuration is correct; if it does not, testers can adjust the fixture power-on timing and quickly test the new timing for comparison.
[0053] Continue to refer to Figure 5 The fixture for testing the power-on sequence also includes a sound module, which is electrically connected to the main control module; the main control module is also configured to control the sound module to emit a prompt sound when the test fixture is completed.
[0054] In this embodiment, the sound module is electrically connected to the main control module and is used to provide auditory feedback to the user upon completion of the test. After the main control module completes the generation and determination of the power-on sequence, i.e., when the test process of the fixture under test ends, it controls the sound module to emit a preset prompt tone, such as a buzzer or voice broadcast. This prompt tone can distinguish the test results; for example, a short single tone is emitted when the test is passed, and a continuous alarm tone is emitted when the test is failed, so that the user can know the test conclusion without looking at the display screen.
[0055] By configuring the sound module, users can be informed of the test status immediately after the test ends without constantly watching the display screen or waiting for feedback from the host computer. This is particularly suitable for scenarios where multiple fixtures are operated simultaneously in a production line environment, effectively freeing up operators' visual attention and improving operational efficiency. Simultaneously, the sound prompts can also serve as an alarm mechanism. When abnormal situations such as power-on failure or timeout occur during the test, the main control module can control the sound module to emit an alarm sound distinct from the normal completion alarm, reminding operators to handle the situation promptly.
[0056] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0057] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods and apparatus according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0058] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.
[0059] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.
[0060] The above provides a detailed description of a fixture for testing power-on timing provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A fixture for testing power-on timing, characterized in that, include: The power-on timing test module and the main control module are electrically connected; The power-on timing test module is configured to be electrically connected to the tooling under test and to receive multiple test signals from the tooling under test. The main control module is configured to send a first reference voltage signal and a second reference voltage signal corresponding to each test signal to the power-on timing test module in response to a test start command; wherein the voltage value of the first reference voltage signal is greater than the voltage value of the second reference voltage signal. The power-on timing test module is further configured to compare the voltage value of each test signal with the voltage value of the corresponding first reference voltage signal and the voltage value of the second reference voltage signal, and output the comparison result to the main control module. The main control module is also configured to record the time point when the level of each test signal changes according to the comparison result, and generate the power-on timing sequence of the multiple test signals of the tool under test.
2. The fixture for testing power-on timing according to claim 1, characterized in that, The power-on timing test module includes multiple comparison channels, each comparison channel corresponding to one test signal, and each comparison channel includes a high-level comparison unit and a low-level comparison unit; wherein, The first input and output terminals of the high-level comparison unit are electrically connected to the main control module, and the second input terminal of the high-level comparison unit is configured to be electrically connected to the output terminal of a corresponding test signal in the fixture under test; the first input and output terminals of the low-level comparison unit are electrically connected to the main control module, and the second input terminal of the low-level comparison unit is configured to be electrically connected to the output terminal of a corresponding test signal in the fixture under test. The high-level comparison unit is configured to compare the first voltage value of a test signal output by the fixture under test with the second voltage value of the corresponding first reference voltage signal. When the first voltage value is greater than or equal to the second voltage value, a high-level valid signal is output to the main control module. The low-level comparison unit is configured to compare the first voltage value of a test signal output by the fixture under test with the third voltage value of the corresponding second reference voltage signal, and output a low-level valid signal to the main control module when the first voltage value is less than or equal to the third voltage value. The main control module is configured to determine the time point when the level transition of the multi-channel test signals occurs based on the high-level active signal and the low-level active signal, and generate the power-on timing sequence.
3. The fixture for testing power-on timing according to claim 2, characterized in that, The number of comparison channels is greater than 4.
4. The fixture for testing power-on timing according to claim 1, characterized in that, The main control module is further configured to match the comparison result with the preset level transition direction corresponding to each of the multiple test signals; wherein, the preset level transition direction includes a direction from low level to high level or a direction from high level to low level; If the comparison result is consistent with the preset level transition direction, record the time point when the level transition of the test signal occurs.
5. The fixture for testing power-on timing according to claim 1, characterized in that, The main control module is also configured to detect whether the multi-channel test signals have undergone level transitions within a preset time period. If any test signal does not undergo a level transition, the test signal that did not undergo a level transition is determined to have failed to power on, and the test is terminated.
6. The fixture for testing power-on timing according to claim 1, characterized in that, The fixture further includes a test button and an interrupt button, which are electrically connected to the main control module, respectively; wherein... The test button is configured to respond to a user's trigger operation and issue the test start command; The interrupt button is configured to issue an interrupt test command in response to a user's interrupt operation; The main control module is also configured to terminate the test in response to the interrupt test command.
7. The fixture for testing power-on timing according to claim 6, characterized in that, The fixture also includes a button; The setting button is configured to respond to the user's adjustment operation, adjust the setting values of the first reference voltage signal and the second reference voltage signal corresponding to each of the multiple test signals, and transmit the setting values to the main control module; The main control module is also configured to receive and store the adjusted setting value, and output the adjusted setting value to the power-on timing test module during the test.
8. The fixture for testing power-on timing according to claim 7, characterized in that, Also includes: The power indicator light is electrically connected to the main control module, which is also configured to control the power indicator light to illuminate in response to a user's trigger operation. A setting indicator light is electrically connected to the main control module, which is also configured to control the setting indicator light to illuminate in response to user adjustment operations.
9. The fixture for testing power-on timing according to claim 1, characterized in that, Also includes: The tooling display screen is electrically connected to the main control module, and the main control module is also configured to control the tooling display screen to display the power-on sequence.
10. The fixture for testing power-on timing according to claim 1, characterized in that, Also includes: The sound module is electrically connected to the main control module; The main control module is also configured to control the sound module to emit a prompt tone when the test of the tooling under test ends.