TWI809448B - Event recorder and method thereof - Google Patents

Abstract

The application provides an event recorder and method thereof for a power supply. The event record method includes selecting an event combination; based on the selected event combination, performing a setting step to set a trigger source combination and a record data combination, the setting step further including any combination of the following: setting a record data type combination, setting a trigger type combination, setting a resolution combination and setting a logic combination; and in response to a logic combination result of the trigger source combination, storing the record data combination in a storage unit.

Description

Event recorder and its methods

The invention relates to an event recorder and its method.

As it stands now, power supplies are configured with black boxes. When the power supply is unexpectedly shut down or crashed, by checking the data recorded in the black box, you can understand the cause of the failure.

The black box of the more advanced power supply can record the events that occurred within a period of time after the shutdown, but it still does not solve the problem of data synchronization in different chips.

In addition, the current trigger event is fixed, and the trigger event may be limited by machine crashes or input problems. In fact, even when the power supply is not shut down, there are still many problems (such as unstable current sharing) that will affect the system quality.

In addition, the current power supply cannot adjust/set the trigger source. In fact, adjusting/setting the trigger source is extremely helpful for different system applications.

What's more, the current power supply cannot adjust/set the recorded data, etc. Moreover, the current power supply cannot adjust/set the data resolution or the time resolution. In fact, the adjustment/setting of the data resolution or the time resolution is necessary to understand different fault conditions.

The invention relates to an event recorder and its method, which can set the trigger source and recorded data according to the selected event, so as to increase the analysis and understanding of the trigger event.

According to one aspect of this case, an event recorder is proposed, including: an adaptive event selection unit, which selects an event combination; a setting unit, which performs a setting according to the selected event combination, and the setting unit sets a trigger source combination and A combination of recorded data, and the setting unit executes any subsequent combination: setting a trigger source combination, setting a recorded data combination, setting a recorded data type combination, setting a trigger type combination, setting a resolution combination, setting a logical combination combination; and an event recording unit, which stores the recorded data combination in a storage unit in response to a logical combination result of the trigger source combination.

According to another aspect of this case, an event recording method is proposed, the method includes: selecting an event combination; according to the selected event combination, performing a setting to set a trigger source combination and a recorded data combination, the setting further includes subsequent Any combination: set a trigger source combination, set a recorded data combination, set a recorded data type combination, set a trigger type combination, set a resolution combination, set a logic combination; and respond to one of the trigger source combinations As a result of the logical combination, the recorded data combination is stored in a storage unit.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given in detail with the accompanying drawings as follows:

100: Power supply

70: Communication interface

50: system

110: Event recorder

210: Adaptive Event Selection Unit

220: trigger source setting unit

230: record data setting unit

240: data type setting unit

250: trigger type setting unit

260: resolution setting unit

270: logic unit

280:Event recording unit

290: data synchronization unit

295: storage unit

215: Setting unit

SC: System Chip

C1~CN: chip

410-465: Steps

510-580: Steps

CH1~CH9: channel

610:Diagnostic tools

FIG. 1 is a schematic diagram of a power supply with an event recorder according to an embodiment of the present invention.

FIG. 2 shows a functional block diagram of an event recorder according to an embodiment of the present invention.

FIG. 3A to FIG. 3C show the schematic diagrams of the operation of the embodiment of the present case under different events.

FIG. 4A and FIG. 4B are schematic diagrams showing data synchronization between different chips in the power supply according to an embodiment of the present invention.

FIG. 4C shows a flowchart of synchronizing different chip internal buffers in a power supply according to an embodiment of the present invention.

FIG. 4D shows a flow chart of achieving data synchronization between different chips according to an embodiment of the present invention.

FIG. 5 shows a flowchart of an event recording method according to an embodiment of the present invention.

FIG. 6 shows a utilization state diagram according to an embodiment of the present invention.

The technical terms in this specification refer to the customary terms in this technical field. If some terms are explained or defined in this specification, the explanations or definitions of these terms shall prevail. Each embodiment of the disclosure has one or more technical features. On the premise of possible implementation, those skilled in the art may selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.

FIG. 1 is a schematic diagram of a power supply with an event recorder according to an embodiment of the present invention. The electronic components shown in Figure 1, such as power supply The responder 100 includes an event recorder 110 and other elements (not shown). The power supply 100 communicates/couples to the system 50 through the communication interface 70 . The system 50 is, for example but not limited to, a cloud server, a server, a storage device, a network device, a power shelf, and the like. The power supply 100 is, for example but not limited to, an uninterruptible power supply system (Uninterruptible Power Supply, UPS), a battery backup power module (Backup Battery Unit, BBU) and the like.

FIG. 2 shows a functional block diagram of an event recorder according to an embodiment of the present invention. The event recorder 110 includes: an adaptive event selection unit 210, a trigger source setting unit 220, a record data setting unit 230, a data type setting unit 240, a trigger type setting unit 250, a resolution setting unit 260, a logic unit 270, and an event recording unit 280 . The data synchronization unit 290 and the storage unit 295 . In other possible examples of the present application, the storage unit 295 may be located outside the event recorder 110, which is also within the spirit of the present application. The storage unit 295 is, for example but not limited to, a hard disk.

In an embodiment of the present case, the trigger source setting unit 220 , the recording data setting unit 230 , the data type setting unit 240 , the trigger type setting unit 250 , the resolution setting unit 260 , and the logic unit 270 can also be collectively referred to as the setting unit 215 . Wherein, in other possible embodiments of this case, the setting unit 215 may include: a trigger source setting unit 220, a record data setting unit 230, a data type setting unit 240, a trigger type setting unit 250, a resolution setting unit 260 and a logic unit 270. Any combination is also within the spirit of this case.

In an embodiment of this case, the event recorder 110, the adaptive event The selection unit 210, the trigger source setting unit 220, the record data setting unit 230, the data type setting unit 240, the trigger type setting unit 250, the resolution setting unit 260, the logic unit 270, the event recording unit 280 and the data synchronization unit 290 can be, for example, Realized by using a chip, a circuit block in a chip, a firmware circuit, a circuit board containing several electronic components and wires, or a storage medium storing a plurality of sets of program codes, or by corresponding software or programs This is all within the scope of the spirit of this case.

The adaptive event selection unit 210 can select different event combinations according to the user's selection, such as but not limited to: current sharing instability, communication failure, input instability and other events or combinations thereof. Once the event combination is selected, the adaptive event selection unit 210 can suggest and set related data to improve the understanding of the cause of the failure.

The trigger source setting unit 220 can set/adjust the trigger source combination according to the event combination selected by the user. Combinations of trigger sources, such as but not limited to: trigger sources whose output voltage is higher than the first rated voltage, such as 12.6V; unstable error of current sharing greater than 10%, or a combination thereof. The trigger source setting unit 220 can achieve a system snapshot according to system requirements and system clock/time. For the situation that the power supply 100 is not shut down, adjusting the combination of trigger sources is helpful to understand and recognize these events. The situation that the power supply 100 is not shut down is, for example but not limited to: unstable current sharing, communication failure, unstable input and so on. In addition, the trigger source setting unit 220 can also support an event trigger portfolio. What's more, the trigger source setting unit 220 can support multiple combinations of trigger conditions, such as edge trigger, pulse trigger and so on.

The recorded data setting unit 230 can set/adjust the recorded data combination according to the requirement or the selected event combination. The combination of recorded data, such as but not limited to: input/output voltage, input/output current, communication interface, delay control, gate-source voltage of power transistor, internal flag and status, etc., or a combination thereof.

The data type setting unit 240 can set the recorded data type combination according to the selected event combination. Combinations of data types, such as but not limited to: Boolean (true, false), root-mean-square (RMS), peak-to-peak, max/min, mean (mean), duty cycle (duty cycle), frequency, instantaneous value and other data types or combinations thereof. The data type combination set by the data type setting unit 240 is related to the recorded data combination of the recorded data setting unit 230 . For example, when the combination of the recorded data of the recording data setting unit 230 is an input/output voltage, the combination of data types set by the data type setting unit 240 may be an instantaneous value.

The trigger type setting unit 250 can set/adjust (multiple) trigger type combinations according to the selected event combination, such as but not limited to: edge (edge) trigger, sequence (sequence) trigger, timeout (time out) trigger, pulse Trigger types such as pulse width triggers or combinations thereof.

The resolution setting unit 260 can set/adjust the resolution combination according to the selected event combination, and the resolution combination includes time resolution and/or data resolution. The resolution setting unit 260 can automatically set/adjust the time resolution according to the fault type. In addition, the resolution setting unit 260 can also set multiple time resolutions to provide different analysis viewpoints.

The logic unit 270 can logically combine the trigger source combination according to the selected event combination, such as but not limited to: logic and (AND), logic or (OR), logic exclusive or (XOR), etc., and then output a logic Combined results.

The event recording unit 280 can record data in the storage unit 295 in response to the output of the logic unit 270 .

If the power supply 100 includes a plurality of internal chips for recording data, the data synchronization unit 290 can synchronize the recording data among other internal chips of the power supply 100 to provide a better view of the cause of the failure. In addition, the data synchronization unit 290 can also achieve alignment of different time resolutions. The recorded data combination of the event recording unit 280 is stored in the storage unit 295 after being synchronized by the data synchronization unit 290 .

FIG. 3A to FIG. 3C show the schematic diagrams of the operation of the embodiment of the present case under different events. Figure 3A shows a schematic diagram of the operation of a current sharing instability event. Figure 3B shows a schematic diagram of operation in the event of a primary output failure. FIG. 3C shows a schematic diagram of the operation of a communication failure event.

In FIG. 3A , the user selects a current share instability event on the adaptive event selection unit 210 . In response to this, the trigger source setting unit 220 sets the trigger source combination as "the output voltage is greater than the first rated voltage, such as 12.6V (Vout>12.6V)" and "the current sharing error is greater than 10% (CS error>10%)". The recorded data setting unit 230 sets the recorded data combination as: output voltage (Vout), output current (Iout), current sharing command CSin, current sharing feedback CSout, input voltage (Vin), main body voltage (Vbulk), average Stream (Ishare), Internal Current sharing flag (internal CS flag); the data type combination set by the data type setting unit 240 is: the instantaneous value (instant) of the output voltage (Vout), the instantaneous value of the output current (Iout), and the instantaneous value of the current sharing command CSin Value, instantaneous value of current sharing feedback CSout, average value of input voltage (average), average value of main body voltage, root mean square value (RMS) of current sharing, Bollinger value (BOOL) of internal current sharing flag; trigger type setting The combination of trigger types set by the unit 250 is: edge trigger (that is, when the output voltage is greater than the first rated voltage, for example, greater than 12.6V, it will trigger) and edge trigger (that is, when the current sharing error When it is greater than 10%, it will trigger); the resolution combination set by the resolution setting unit 260 is: the resolution of the output voltage (Vout) is 0.5V/20μs, the resolution of the output current is 1A/20μs, the current sharing command CSin The resolution of CSout is 0.1V/20μs, the resolution of CSout is 0.1V/20μs, the resolution of input voltage is 1V/100μs, the resolution of main voltage is 1V/100μs, and the resolution of current sharing is 0.1 The resolution of V/20 μs and the internal current sharing flag is NA (none); the logical combination of the logic unit 270 is logical or (OR).

That is, in Figure 3A, when the output voltage is greater than 12.6V or when the current sharing error is greater than 10%, the logic unit 270 will output a logic high signal to the event recording unit 280 to combine the recorded data (output voltage, The output current, the current sharing command CSin, the current sharing feedback CSout, the input voltage, the main voltage, the current sharing, the internal current sharing flag, etc.) are synchronized by the data synchronization unit 290 and then recorded in the storage unit 295 .

In FIG. 3B , the user selects a main output failure event on the adaptive event selection unit 210 . In response to this, trigger The source setting unit 220 sets the combination of trigger sources as "the main output voltage is off (main output off)", "power good signal drops (power good signal drops)", "the output voltage is less than the second rated voltage, such as 11.4V (Vout< 11.4V)" and "input good signal (input good)"; the recorded data setting unit 230 sets the recorded data combination as: output voltage (Vout), output current (Iout), input voltage (Vin), main body voltage (Vbulk ), main body voltage good signal PFCOK, input voltage good signal ACOK, power good signal (POWERGOOD), current sharing (Ishare); the data type combination set by the data type setting unit 240 is: output voltage (Vout) instantaneous value (instant ), instantaneous value of output current (Iout), instantaneous value of input voltage (Vin), instantaneous value of bulk voltage (Vbulk), instantaneous value of main voltage good signal PFCOK, instantaneous value of input voltage good signal ACOK, power good signal The Bollinger value (BOOL) of (POWERGOOD) and the instantaneous value of current sharing (Ishare); the trigger type combination set by the trigger type setting unit 250 is: edge trigger (that is, when the main output voltage is closed, it will trigger ), edge-triggered (that is, triggers when the power-good signal falls), edge-triggered (that is, triggers when the output voltage is less than 11.4V), and edge-triggered (that is, when the input-good signal falls, will trigger); the resolution combination set by the resolution setting unit 260 is: the resolution of the output voltage (Vout) is 0.5V/20μs, the resolution of the output current (Iout) is 1A/20μs, and the resolution of the input voltage (Vin) The resolution is 1V/100μs, the resolution of the main body voltage (Vbulk) is 1V/100μs, the resolution of the main body voltage good signal PFCOK is 0.5V/20μs, the resolution of the input voltage good signal ACOK is 0.5V/20μs, the power is good The resolution of the signal (POWERGOOD) is NA (none), The resolution of the current sharing (Ishare) is 0.5V/20μs; the logic combination of the logic unit 270 is logic or (OR), logic or (OR), logic and (AND) (that is, the 4 trigger sources, two by two After performing a logical OR, perform a logical AND). When the logic unit 270 outputs a logic high signal to the event recording unit 280, the event recording unit 280 combines the recorded data (output voltage (Vout), output current (Iout), input voltage (Vin), body voltage (Vbulk), body The voltage good signal PFCOK, input voltage good signal ACOK, power good signal (POWERGOOD), current sharing (Ishare, etc.) are synchronized by the data synchronization unit 290 and then recorded in the storage unit 295 .

In FIG. 3C , the user selects a Communication Error event on the adaptive event selection unit 210 . In response to this, the trigger source setting unit 220 sets the combination of trigger sources as “I2C protocol error (I2C protocol error)” and “PMbus communication overtime (PMbus Communication Timeout)”; the record data setting unit 230 sets the combination of recorded data as : serial data line SDA, serial clock line SCL, output voltage (Vout), output current (Iout), internal I2C buffer (internal I2C buffer) and internal I2C state (internal I2C state); data type setting unit 240 The set data type combination is: the instantaneous value (instant) of the serial data line SDA, the instantaneous value (instant) of the serial clock line SCL, the instantaneous value (instant) of the output voltage (Vout), and the output current (Iout) The instantaneous value of the internal I2C buffer data bytes and the state data of the internal I2C state (internal I2C state); the trigger type combination set by the trigger type setting unit 250 is: sequence (that is, when the serial data line SDA and serial clock line SCL have a communication protocol error, which will trigger), timeout (that is, when the PMbus When the communication is overtime, it will be triggered); the resolution combination set by the resolution setting unit 260 is: the resolution of the serial data line SDA is 0.5V/20μs, and the resolution of the serial clock line SCL is 0.5V/20μs 20μs, the resolution of the output voltage (Vout) is 0.5V/20μs, the resolution of the output current (Iout) is 1A/20μs, the resolution of the internal I2C buffer is NA (none), the resolution of the internal I2C state is NA (none); the logic combination of the logic unit 270 is logic or (OR) (that is, when one of the I2C communication protocol failure or the PMbus communication timeout is triggered, the logic unit 270 outputs a logic high signal). When the logic unit 270 outputs a logic high signal to the event recording unit 280, the event recording unit 280 combines the recorded data (serial data line SDA, serial clock line SCL, output voltage (Vout), output current (Iout), The internal I2C buffer (internal I2C buffer) and the internal I2C state (internal I2C state, etc.) are synchronized by the data synchronization unit 290 and then recorded in the storage unit 295 .

FIG. 4A and FIG. 4B are schematic diagrams showing data synchronization between different chips in the power supply according to an embodiment of the present invention. In FIG. 4A, the system chip SC sends a trigger signal TS to a plurality of chips C1˜CN to achieve data synchronization among the plurality of chips C1˜CN. In Fig. 4B, a system chip SC of the power supply unit sends a trigger signal TS to a target chip of the plurality of chips C1~CN to achieve data synchronization among the chips C1~CN, wherein the target chip is Refers to the chip receiving the trigger signal TS, taking FIG. 4B as an example, chip C2 is the target chip. It may depend on the communication interface used as to achieve data synchronization according to Fig. 4A or Fig. 4B.

The details of data synchronization in the embodiment of this case will now be described.

When achieving data synchronization, if the system 50 needs to achieve time alignment with the power supply 100 , the system 50 can send the system time and system date to the power supply 100 .

In addition, if data synchronization and time alignment between different chips in the power supply 100 are to be achieved, it can be achieved through a general purpose input/output pin (General Purpose Input Output, GPIO) or a timestamp (timestamp). Stamps may be sent to the chips via the system clock of system 50 . In addition, in order to achieve time synchronization, the data transmission time can be estimated by calculating the transmission time of the communication protocol.

In addition, in an embodiment of the present invention, the synchronization of the multiple internal buffers of the multiple chips can be achieved, for example but not limited to: achieving synchronization through pointer mapping.

FIG. 4C shows a flowchart of synchronizing internal buffers of multiple chips in a power supply according to an embodiment of the present invention. In step 410, the system chip (such as the system chip SC in FIG. 4A and FIG. 4B ) sends a power enable signal or a time stamp signal to one or more chips of the plurality of chips C1˜CN. In step 420, a data synchronization signal is sent to the plurality of chips, as shown in FIG. 4A or FIG. 4B. In step 430, the buffer pointers in the dies are reset. The plurality of chips can achieve buffer synchronization through FIG. 4C.

FIG. 4D shows a flow chart of achieving data synchronization between a plurality of chips according to an embodiment of the present invention. In step 440, when logic unit 270 outputs When a logic high signal is sent to the event recording unit 280, for example, a fault occurs or a system triggers, a data recording signal appears at this time. In step 445, a first chip of the plurality of chips (such as but not limited to chip C1) sends its first buffer index to a second chip of the plurality of chips (such as but not limited to Constrained by, wafer C2). In step 450, the first chip continuously records data within a first predetermined time (for example, 100 ns).

In step 460, the second chip receives the first buffer pointer of the first chip. In step 465, according to the received first buffer index of the first chip, the second chip determines a data recording time, so that data synchronization between the first chip and the second chip can be achieved. FIG. 4D is an example for illustrating data synchronization between the first chip and the second chip (such as chips C1 and C2), and it should be applicable to data synchronization between other chips.

FIG. 5 shows a flowchart of an event recording method according to an embodiment of the present invention. In step 510 , the user selects an event combination through the adaptive event selection unit 210 . In step 520, the trigger source setting unit 220 can set/adjust the trigger source combination according to the event combination selected by the user. In step 530, the recorded data setting unit 230 can set/adjust the recorded data combination according to the event combination. In step 540, the data type setting unit 240 can set the recorded data type combination according to the selected event combination. In step 550, the trigger type setting unit 250 can set/adjust (multiple) trigger type combinations according to the selected event combination. In step 560 , the resolution setting unit 260 can set/adjust a resolution combination (such as time resolution and/or data resolution) according to the selected event combination. In step 570, The logic unit 270 can logically combine the trigger source combinations according to the selected event combinations. In step 580 , the event recording unit 280 may record data in the storage unit 295 in response to the output of the logic unit 270 (ie, in response to the logical combination result of the trigger source). In other possible embodiments of the present application, steps 520-570 may also be collectively referred to as a setting step, wherein the setting step includes any combination of steps 520-570.

In other possible embodiments of the present case, the execution order of steps 520-570 may not be limited to that in Figure 5, that is, the execution order of steps 520-570 may be changed; or, the execution order of steps 520-570 may be executed synchronously , which are all within the spirit of this case.

FIG. 6 shows a utilization state diagram according to an embodiment of the present invention. In Fig. 6, the channels CH1~CH5 are, for example, the data recorded by the first chip (for example, the chip C1), and the channels CH6~CH9 are, for example, the data recorded by the second chip (for example, the chip C2). The above-mentioned embodiment can make these chips achieve data synchronization, so the time of the channels CH1˜CH9 can be aligned. The data/content recorded by the event recorder 110 can be transmitted to the diagnostic tool 610 and the system 50 through the communication interface 70 . The diagnostic tool 610 is a stand-alone device used to simulate the communication protocol of the system 50 . That is to say, through the system 50 or the diagnostic tool 610 , the event recorder 110 of the power supply 100 can be read, so that it is more convenient for analysts to understand the cause of failure or abnormality. Therefore, the event recorder 110 of the embodiment of the present invention can be used to help in fault detection of power supplies, electronic components, etc., and understand the cause of the fault.

In an embodiment of the present case, the user (such as the user/operator of the system 50 Authors, etc.) can edit the adaptive event selection unit 210 through the communication interface 70 to add or modify event combinations.

In an embodiment of the present case, setting items (trigger source combination, recorded data combination, recorded data type combination, trigger type combination, resolution combination, logical combination, etc.) can be stored in the storage unit 295 .

To sum up, the event recorder of the embodiment of this case can improve the traceability, maintainability, reliability, etc. of the power supply and system products.

In an embodiment of the present case, when the power supply is shut down unexpectedly, the cause of the failure can be further understood through the event recorder.

In an embodiment of the present case, because different chips can achieve data synchronization, the performance of the power supply is further increased.

In one embodiment of the present case, since the trigger source can be adjusted/set, it is extremely helpful for different system applications.

In the first embodiment of the present case, since the recorded data and the resolution can be adjusted/set, it is more helpful to understand different fault conditions.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

510-580: Steps

Claims (13)

An event recorder applied to a power supply, the event recorder comprising: an adaptive event selection unit for selecting an event combination; a setting unit for performing a setting according to the selected event combination, the setting unit sets A combination of a trigger source and a combination of recorded data, and the setting unit executes any subsequent combination: setting a combination of recorded data type, setting a combination of trigger type, setting a combination of resolution, setting a combination of logic; and an event record The unit stores the recorded data combination in a storage unit in response to a logic combination result of the trigger source combination. The event recorder as described in Claim 1 further includes: a data synchronization unit, the recorded data combination of the event recording unit is synchronized by the data synchronization unit and then recorded in the storage unit. The event recorder as described in claim 2, wherein, the adaptive event selection unit, the setting unit, the event recording unit and the data synchronization unit are implemented by using a chip, a circuit block in the chip, a firmware It is realized by a body circuit, a circuit board containing several electronic components and wires, a storage medium storing multiple sets of program codes, a corresponding software or a program. The event recorder as described in claim item 1, wherein the setting unit includes any subsequent combination: a trigger source setting unit, a recording data setting unit, a data type setting unit, a trigger type setting unit, and a resolution setting unit and a logical unit. The event recorder as described in claim 2, wherein, when the data synchronization unit synchronizes a plurality of internal buffers of a plurality of chips: a system chip sends a power start signal or a time stamp signal to the plurality of chips one or more of the chips; sending a data synchronization signal to the plurality of chips; and resetting a plurality of buffer pointers in the plurality of chips. The event recorder as described in claim 2, wherein, when the data synchronization unit performs data synchronization: a data recording signal appears; a first chip of a plurality of chips sends a first buffer pointer to the plurality of chips a second chip of a chip; at a first predetermined time, the first chip continues to record data; the second chip receives the first buffer index of the first chip; and according to the received first buffer device indicator, the second chip determines a data recording time, so as to achieve data synchronization between the second chip and the first chip. The event recorder as described in Claim 1 further includes: a communication interface coupled to the event recorder for editing the adaptive event selection unit, adding or modifying the event combination. The event recorder according to claim 1, wherein the trigger source combination, the recorded data combination, the recorded data type combination, the trigger type combination, the resolution combination and the logical combination are stored in the storage unit . An event recording method applied to a power supply, the event recording method comprising: Select an event combination; according to the selected event combination, perform a setting to set a trigger source combination and a recorded data combination, and the setting includes any subsequent combination: set a recorded data type combination, set a trigger type Combining, setting a resolution combination, setting a logical combination; and storing the recorded data combination in a storage unit in response to a logical combination result of the trigger source combination. The event recording method as described in Claim 9 further includes: recording in the storage unit after performing data synchronization on the recorded data combination. The event recording method as described in Claim 10, wherein, when performing data synchronization on a plurality of internal buffers of a plurality of chips, a system chip sends a power-on signal or a time stamp signal to the plurality of chips one or more chips; sending a data synchronization signal to the plurality of chips; and resetting a plurality of buffer pointers in the plurality of chips. The event recording method as described in claim 10, wherein, when data synchronization is performed, a data recording signal appears; a first chip of a plurality of chips sends a first buffer pointer to a first chip of the plurality of chips Two chips; at a first predetermined time, the first chip continues to record data; the second chip receives the first buffer index of the first chip; and According to the received first buffer index, the second chip determines a data recording time, so as to achieve data synchronization between the second chip and the first chip. The event recording method described in Claim 9 further includes: adding or modifying the event combination through a communication interface.

Images