684 results about "Clock rate" patented technology

The invention relates to the technical field of synchronization in data communication, and provides a PTP protocol-based chip-level hardware timestamp generation method and system, and the method comprises the steps: 1, receiving a synchronization message and a delay request message from a main clock, carrying out the evaluation of a physical layer signal, and recording a first hardware timestamp; 2, responding to the received delay request message, generating and sending a delay response message, acquiring bidirectional transmission delay data by exchanging the delay request and the delay response message, and calculating clock skew in combination with the first hardware timestamp and the bidirectional transmission delay data; 3, adjusting the local clock frequency according to the clock skew; 4, after the synchronization is completed, associating the second hardware timestamp with the corresponding data message, and storing the associated data in a buffer area in the chip; and 5, generating standardized timestamp information, and outputting the standardized timestamp information through a chip interface. And high-precision time synchronization and timestamp generation are realized.

The invention discloses a single-chip microcomputer hierarchical dormancy control method based on dynamic power consumption prediction, and relates to the technical field of single-chip microcomputer low power consumption control, and the method specifically comprises the steps: building a mapping relation between a load current and a clock frequency; setting a dynamic dormancy threshold value; constructing a dynamic power consumption prediction model; a dormancy strategy is designed, module-level power consumption management and single-chip microcomputer function-based power consumption management are adopted, the callable frequency or the maximum operation duration of each function is distributed according to task priorities and battery residual energy consumption, and single-chip microcomputer peripherals are triggered through events and are independently awakened; and executing the sleep strategy, automatically awakening the single chip microcomputer according to a preset awakening condition, and realizing abnormity positioning and processing based on threshold comparison and power consumption monitoring in the process of executing the sleep strategy. According to the invention, module-level power consumption management and single-chip microcomputer function-based power consumption management are realized, the limitation of traditional global dormancy is broken, the need of overall reset during wakeup is avoided, and the response speed is improved while the energy consumption is reduced.

A circuit system includes a circuit board including a plurality of integrated circuit (IC) chips. The circuit board is configured to be immersed in a two-phase cooling fluid. The circuit system includes a controller. The controller is configured to, in a control process: obtain temperature data indicative of respective internal temperatures of the plurality of IC chips, predict respective future internal temperatures of the plurality of IC chips based on the respective internal temperatures, and adjust clock frequencies and power supply voltages of the plurality of the IC chips such that the predicted respective future internal temperatures are within a target temperature range. A clock frequency of a first IC chip of the plurality of IC chips is adjusted to be different from a clock frequency of a second IC chip of the plurality of IC chips.

The invention relates to the technical field of chip testing, and discloses a clock reset system-level verification method and device based on general verification methodology, and the method comprises the steps: firstly analyzing a clock topological relation defined in a system control unit architecture document, and generating a clock reset information table; on the basis of the information table, an executable verification environment component and a virtual interface component are automatically generated through a script, the verification environment component comprises an excitation forwarding and processing component and can generate clock and reset signals matched with framework definition, and the virtual interface component can generate actual clock and reset waveforms; and finally, constructing a verification platform based on the components, calling the excitation sequence in the parameterized test sequence library, and carrying out system-level clock reset verification on the digital chip. And meanwhile, the parameterized test sequence library supports flexible adjustment of a verification scene and ensures that a test case fits a clock frequency defined by an architecture document, and a reset mechanism can improve the efficiency, accuracy and reliability of digital chip clock reset system-level verification.

A retimer and a retiming method may employ dual path clock forwarding to drive a transmit clock generator. An illustrative integrated retimer circuit includes a sampling element configured to generate a digital receive signal by sampling an analog receive signal in accordance with a sampled signal; a timing error estimator configured to generate a timing error signal indicative of an estimated timing error of the sampled signal relative to the analog received signal; a clock recovery circuit configured to derive a sampled signal from the estimated timing error and a reference clock in part by determining the frequency signal; a transmitter configured to retransmit the digital reception signal according to a transmission clock; and a transmit clock generator configured to derive a transmit clock. The transmit clock generator operates based on each of: a reference clock; a frequency signal; and a phase error of the transmit clock with respect to the sampled signal.

According to the task scheduling and resource management system and method provided by the invention, full-link automatic management from peripheral event triggering to resource dynamic allocation and recovery is realized through close cooperation of the peripheral collaborative network, the dynamic power management module, the task scheduling module, the self-adaptive clock module and the exception monitoring unit. Compared with the prior art, the system not only can perform hardware-level scheduling in real time according to task priorities and system loads, but also can improve energy efficiency through regionalized power supply and clock frequency adjustment, supports rapid recovery and storage of task contexts, has a perfect fault monitoring and isolation mechanism, and is high in practicability. Therefore, the real-time performance, the energy consumption efficiency and the operation reliability of the system are obviously improved.

The invention relates to a method for awakening electronic equipment, which comprises the following steps that: when the electronic equipment is in a dormant state, a subsystem receives a first awakening event; in response to determining that the first wake-up event belongs to the subsystem external wake-up event, the subsystem sets the clock frequency of a first sub-module of the subsystem from a current first frequency value to a second frequency value, the first frequency value is the running frequency set when the subsystem is in a dormant state, and the second frequency value is the highest running frequency allowed by the subsystem; the first sub-module of the subsystem is configured to control the temporary operation frequency of the subsystem; the subsystem analyzes the first wake-up event and sends a related first message to the main system; in response to a response to the first message returned by the main system, the subsystem sets the clock frequency of the first sub-module as a first frequency value; and in response to determining that all clock frequencies of the first sub-module and other sub-modules of the subsystem are set as the first frequency value, the subsystem enters a dormant state.

The invention provides a processor chip with adjustable power consumption, which is integrated with a plurality of functional cores and a plurality of routers, all the routers are mutually connected to form an on-chip network, all the functional cores are mounted on the on-chip network to realize mutual communication, and the chip further comprises a power consumption management module, all the functional cores and all the routers are configured to be subjected to clock frequency adjustment by a power consumption management module, and the power consumption management module is used for adjusting the clock frequency of the processor chip based on a received frequency raising request from the functional cores and / or the routers; the clock frequency of the processor chip is adjusted based on a self-configured adjusting mechanism; wherein the power consumption management module is configured to support unified adjustment of clock frequencies of all the functional cores and / or all the routers, and independently adjust the clock frequencies of each functional core and each router; and the power consumption management module is mounted on the network-on-chip to realize communication with each router and each functional core.

The invention provides a universal serial bus (USB) 2.0 host speed reduction bridge based on bidirectional protocol handshake and a prototype verification or hardware simulation acceleration platform, which are characterized in that a slow-speed side module runs at a slow clock frequency, is responsible for realizing a protocol layer of a USB protocol and a physical link layer function of the USB protocol, and communicates with a USB2.0 host controller in a chip design (DUT) to be tested; the original speed side module works under the original clock frequency, logic of a protocol layer of a USB protocol and a physical link layer of the USB protocol is achieved, communication with an external real USB2.0 slave end device is achieved through a USB2.0 PHY, data caching and synchronization are achieved through a data caching RAM, and the bridge control module overall plans the whole situation and accurately regulates and controls independent handshake of the USB2.0 protocol layers on the two sides under the original clock frequency. Through bidirectional protocol handshake on the two sides of the speed reduction bridge, data communication between a low-speed to-be-tested chip design (DUT) in a chip prototype verification platform and external standard-speed real USB slave equipment is achieved through the speed reduction bridge.

The invention relates to the field of precise motion control, in particular to a precise motion control method and system for a multi-axis linkage direct-drive-force tool tower crane. Comprising the following steps: acquiring a processing track, dispersing the processing track into a plurality of spatial motion units, and determining a target displacement for each motion axis; receiving a completion signal; and after determining that the motion axis participating in the current space motion unit completes the corresponding target displacement according to the completion signal, obtaining the completion time of each motion axis, and issuing the target displacement corresponding to the next space motion unit to each motion axis by taking the completion time of the motion axis with the longest completion time as a time reference. Therefore, each motion shaft is started to move the next space motion unit. The technical problems that the machining precision is reduced and the product quality is unqualified due to clock frequency drift and movement shaft synchronization deviation accumulation caused by gradual change of microcosmic physical characteristics in a system of a multi-shaft linkage direct-driving-force tool tower crane are solved.

A phase lock loop includes a clock multiplier configured to receive a reference clock and output a multiplied clock; a phase detector configured to receive the multiplied clock and a divided clock and output a phase error signal; a loop filter configured to receive the phase error signal and output a control signal; a controllable oscillator configured to output an output clock in accordance with the control signal; and a clock divider configured to receive the output clock and output the divided clock, wherein the clock multiplier is either a frequency doubler or a frequency quadrupler, and a frequency response of the loop filter comprises a first notch at the frequency of the reference clock and a second notch at twice the frequency of the reference clock.

The invention provides a clock frequency adjusting method and device, an image processor, equipment and a medium, and relates to the technical field of computers. The method comprises the following steps: receiving current counting information corresponding to at least one preset monitoring event related to the running state of the GPU; constructing a feature vector based on the current counting information; the feature vector is input into a pre-trained prediction model, the load sudden increase probability is obtained, the prediction model is obtained through training based on historical counting information corresponding to a preset monitoring event and load sudden increase labeling data, and the load sudden increase probability represents the probability that the operation load of the GPU is to be suddenly increased; and adjusting the current clock frequency of the GPU based on the load sudden increase probability. According to the scheme, the feature vector can be constructed based on the monitoring event counting information, the load sudden increase probability is obtained through the prediction model, dynamic adjustment of the clock frequency is achieved, and then the response efficiency and the adjustment accuracy of GPU clock frequency adjustment are improved.

The invention relates to the technical field of integrated circuits, and provides a dynamic voltage frequency configuration method, device, equipment and program product of a chip, and the method comprises the steps: for each chip in a sample set comprising a plurality of chips, determining a performance index based on a chip parameter and a preset test frequency; comparing the performance index of each chip with a preset limit value to determine the number of chips passing the test; based on the number of the chips passing the test and the total number of the chips in the sample set, determining the actual yield under the preset test frequency; comparing the actual yield with a target yield, and iteratively adjusting the preset test frequency until the target yield is met so as to obtain an effective clock frequency; a voltage frequency table is generated based on the effective clock frequency and the corresponding voltage. According to the method, the relationship between the effective clock frequency and the yield is fully reflected, the generated voltage frequency table can provide the optimal working parameter combination for the chip under the condition of ensuring the yield, and the performance and efficiency of chip design are improved.

The invention belongs to the technical field of clock synchronization. The invention provides an unmanned aerial vehicle communication clock synchronization compensation device and method based on GPS / Beidou second pulse. According to the embodiment of the invention, a second pulse signal and a UTC timestamp are obtained; after several rounds of counting and sliding filtering are carried out on the second pulse signal interval time, the actual frequency and nominal value deviation of the crystal oscillator is calculated; the actual frequency and nominal value deviation of the crystal oscillator are stored, and the crystal oscillator drift model is updated; and dynamically adjusting the output clock frequency according to the nominal value deviation, and compensating the crystal oscillator error to obtain a compensated clock signal. And the second pulse loss duration is monitored, and the crystal oscillator drift model is updated according to the nominal value deviation in the storage module so as to predict the future clock deviation. And within the period of validity of the pulse per second, the clock synchronization error is reduced to improve the synchronization precision. And under the condition of GPS / Beidou, the synchronization precision can be maintained longer than that of a single GPS / Beidou method. And frequency offset automatic compensation along with temperature change can be realized.

Retimers and retiming methods may employ dual path clock forwarding to drive a transmit clock generator. One illustrative integrate retimer circuit includes: a sampling element configured to produce a digital receive signal by sampling an analog receive signal in accordance with a sampling signal; a timing error estimator configured to produce a timing error signal indicating an estimated timing error of the sampling signal relative to the analog receive signal; a clock recovery circuit configured to derive the sampling signal from the estimated timing error and a reference clock in part by determining a frequency signal; a transmitter configured to retransmit the digital receive signal in accordance with a transmit clock; and a transmit clock generator configured to derive the transmit clock. The transmit clock generator operates based on each of: the reference clock; the frequency signal; and a phase error of the transmit clock relative to the sampling signal.

The invention discloses a system reference clock frequency accuracy automatic calibration circuit and a calibration method thereof, and belongs to the technical field of frequency sources, the calibration circuit comprises a first crystal oscillator, a first power divider, a second power divider, a second crystal oscillator, an analog switch, a radio frequency switch, a detector, a comparator, an FPGA controller, a digital analog converter, an operational amplifier and a temperature sensor. When an external high-precision reference clock is accessed, the FPGA controller automatically switches a frequency measurement reference, performs high-precision frequency measurement on a 100MHz signal output by the first crystal oscillator, and judges whether calibration is needed or not according to frequency offset; if calibration is needed, the output voltage of the digital-to-analog converter is adjusted, the Vc end of the first crystal oscillator is controlled after operational amplification, and frequency closed-loop adjustment is achieved. According to the method, the crystal oscillator does not need to be disassembled, calibration is rapidly completed on site, and system availability and long-term frequency stability are remarkably improved.

The invention provides a chip testing method and device, and belongs to the technical field of chip testing. The method comprises the steps that an intermediate clock with the frequency the same as that of an input channel-associated clock in a test excitation signal is generated through a high-frequency clock signal, and the frequency of the high-frequency clock signal is larger than that of the input channel-associated clock; adjusting the phase of the intermediate clock according to the time sequence parameter of each tested chip, and generating a phase correction associated clock; and replacing the input associated clock based on the phase correction associated clock to update the test excitation signal so as to test each tested chip by using the updated test excitation signal. Independent time sequence compensation of each chip is achieved through high-frequency signal dynamic high-precision phase adjustment, the limitation of a traditional single time sequence parameter is broken through, and flexible consideration of the test rate and the test number is achieved. From the aspect of deployment, the design process and the file format of the original test system do not need to be modified, the compatibility is good, the universality and the deployment efficiency are improved, and the deployment cost is reduced.

A clock circuit, a receiver, and a passive optical communication network system are disclosed. The clock circuit is applied to a receiver in a passive optical communication network and is configured to adjust the clock frequency of an output clock signal based on a transmission protocol, the clock circuit comprises at least one clock path and a frequency divider, and the at least one clock path comprises a first clock path; wherein the first clock path receives a reference clock signal from the first phase-locked loop circuit and a control signal from the clock data recovery circuit, and interpolates a conversion signal of the reference clock signal by using the reference clock signal so as to output a multi-phase clock signal; and the frequency divider receives the multi-phase clock signal and performs frequency division on the multi-phase clock signal based on a preset frequency division value, and the preset frequency division value is determined based on a transmission protocol. The clock circuit can be compatible with fast clock switching schemes of data rates of different PON protocols, so that the adaptability and the locking performance of a receiver in a burst mode are improved.

To provide a battery management system capable of performing synchronization of a measurement timing of a battery in a plurality of devices as accurately as possible.SOLUTION: A device 10...1N includes an oscillator 29 that generates a second clock whose frequency can be controlled, and a time information generation part 30 generates second time information from the second clock generated by the oscillator 29. The device 10...1N generates a measurement timing of a battery from the second time information. When receiving a synchronization command from a controller 52, the device 10...1N compares the received first time information with the second time information, and controls the frequency of the oscillator 29 so as to eliminate the time difference from the compared difference. The device 10...1N controls the frequency of the second clock of the oscillator 29 to approach the frequency of the first clock of the controller 52.SELECTED DRAWING: Figure 1

The invention provides a 200GE service data transmission method based on 224G high-speed SerDes, a chip and a communication system, and the method comprises the steps that a PCS sending module carries out PCS sending processing on obtained upstream data to obtain first PCS data; the PCS sending module sends first PCS data to the PMA sending module through the rate increasing module according to the first PCS clock rate and the first PCS data bit width; the rate increasing module determines first clock information according to the first PMA data bit width, the first PMA clock rate, the first PCS clock rate, the first PCS data bit width and the set bandwidth so as to increase the first PCS clock rate; the PCS sending module sends first PCS data according to the first PMA data bit width and the improved first PCS clock rate; the PMA sending module processes the first PCS data and sends the first serial data. The method can be applied to the fields of internet access and related services, the alignment mark insertion process is avoided so as to improve the sending rate of the PCS layer, and the PMA state frame is introduced so as to accelerate link convergence and improve link stability.

The invention discloses an SERDES verification method and device, and the method comprises the steps: obtaining a protocol type and a configuration mode supported by a to-be-tested SERDES, generating a first compiling simulation script according to the protocol type, and enabling the script to comprise the clock frequency, the data rate, the parameter configuration of a coding mode, the generation rule of simulation excitation, and a result output path; based on the test requirement and the protocol type, a test top layer file and a file list are determined, and the file list comprises paths of the to-be-tested design file and the test excitation file; calling a script, executing first compiling simulation, and generating a waveform file and a log file; switching to a second protocol type, updating the test top layer file and the file list, and generating a second compiling simulation script; executing secondary compiling simulation to generate a waveform file and a log file corresponding to the second protocol; the log file is analyzed, the bit error rate, the function coverage rate and the time sequence violation are counted, and a comprehensive test report is generated. The method can accelerate the verification speed and reduce the development time.

The invention discloses a display panel and a display device. The display panel comprises a plurality of sub-pixels and a pixel circuit connected with the sub-pixels. The driving circuit comprises a plurality of cascaded shift registers, and the shift registers are used for outputting primary scanning signals based on the clock signals; the gating circuits correspond to the shifting registers, the shifting registers are connected with the pixel circuits through the gating circuits, and the gating circuits provide scanning signals for the pixel circuits; the display area comprises a first sub-display area and a second sub-display area, and the data refreshing frequency of the first sub-display area is larger than that of the second sub-display area; in the first display mode, data refreshing is carried out on each sub display area; in the second display mode, the first sub-display area performs data refreshing, and the second sub-display area performs data retention; in the first display mode and the second display mode, the shift registers corresponding to the first sub-display area and the second sub-display area receive clock signals of the first clock frequency.

The present invention relates to the field of time synchronization, and relates to a precise clock synchronization parameter tracking method based on an augmented Kalman neural network. In the method, for a multi-hop network scenario where an ambient temperature changes and a link transmission delay is asymmetric, taking into account the impact of an accumulated asymmetric link transmission delay in a multi-hop network on clock synchronization accuracy, a multi-hop network clock observation equation containing an accumulated asymmetric link delay is derived, and on the basis of a quadratic polynomial model of a temperature and a clock frequency offset, a recursive state equation of the clock frequency offset and a temperature change is established; the evolution processes of an accumulated asymmetric delay and an unknown temperature coefficient are modeled as a first-order linear difference equation, and the accumulated asymmetric delay and the unknown temperature coefficient are augmented to a clock parameter tracking state space model; and an augmented Kalman neural network algorithm is used to realize joint tracking of a clock phase offset and a clock frequency offset of a slave node. This method employs a hybrid data-model-driven approach to perform joint tracking of the clock phase offset and frequency offset, thereby improving accuracy and robustness of clock parameter tracking.

The invention discloses a power line communication signal sending and receiving method and device based on a semi-parallel architecture, and belongs to the technical field of power system communication. The method comprises the following steps: obtaining a sending signal comprising a plurality of sub-signals, dynamically determining the number R of parallel processing units according to a transmission data rate and a clock frequency, phase adjustment, frequency domain transformation, linear combination and filtering processing are carried out through R parallel processing units in the DCT module, the matrix module and the multi-phase filter module in sequence, and finally processed signals are serialized and sent to a power line channel; and the receiving process reversely executes corresponding processing. Therefore, by implementing the method and the device, the problem that the transmission rate and the communication stability of the system are difficult to effectively improve while low resource consumption and low power consumption are ensured in the prior art can be solved.

The invention provides a control instruction time sequence synchronization method and device of a multi-node industrial control system. The control instruction time sequence synchronization method comprises the following steps: a control node calculates an initial time offset through a calibration frame, loops back a test frame to measure link transmission delay, and compensates a local clock of an execution node to realize initial alignment; periodically broadcasting a reference clock, calculating an accumulated drift amount in real time by an execution node, and adjusting a local clock frequency when the accumulated drift amount exceeds a threshold value; sending a control instruction based on a synchronization period starting moment, synchronizing a trigger signal to enable an execution node to sample data at the same time, and reading the data by a period ending boundary. According to the control instruction time sequence synchronization method, the initial synchronization precision is + / -10ns, the accumulated drift distance is controlled within + / -10ns, the total time sequence deviation is smaller than 100ns, system errors are effectively eliminated, the problem of crystal oscillator deviation is solved, the method can be compatible with an industrial bus, the hardware cost is reduced, and the multi-axis cooperative control precision and stability are greatly improved.

The invention relates to a cross-clock-domain data synchronization method, an FIFO control circuit and a synchronization circuit, and the method comprises the steps: obtaining a first clock cycle number passed by a source clock domain in target time if the write clock frequency of the source clock domain is different from the read clock frequency of a target clock domain, the first clock period number and the second clock period number passed by the target clock domain within the target time are both integers; under the condition that the first clock cycle number is larger than the second clock cycle number, multiple first effective clock signals are generated every time a target time passes, the multiple first effective clock signals are generated within the target time, the number of the first effective clock signals is the second clock cycle number, and data writing control is carried out based on the first effective clock signals, the cross-clock domain data synchronization is completed; according to the method, the cross-clock-domain data synchronous transmission between clocks with different frequencies is well realized, the implementation is relatively high, and the cost is relatively low.

The present disclosure discloses an audio synchronization method for a USB device, a USB device, a storage medium and a communication system. The audio synchronization method for a USB device includes: obtaining an SOF clock calculated by the USB device, the SOF clock calculated by the USB device being obtained by simulating an SOF interrupt through software and recording a timestamp of the SOF interrupt; obtaining a target clock frequency of the USB device based on a clock frequency of a USB host, an SOF clock of the USB host and the SOF clock calculated by the USB device; and adjusting a clock frequency of the USB device based on the target clock frequency of the USB device.

A method of synchronizing a network side time sensitive network (TSN) converter (NW-TT) module within a user plane function (UPF) in a communication network with a master clock (GM) in the 5G time domain of the communication network is described. The method comprises the step of adjusting the clock frequency of an N3 interface to enable the N3 interface to be synchronized with the clock of a GM. The method includes generating one or more pulses on a pin of the N3 interface. The method includes detecting the one or more pulses on a pin of the NW-TT module. The method includes determining a time offset value (Offset NW-TT) between the N3 interface and the NW-TT module. The method includes adjusting a time or clock frequency of the NW-TT module using a determined time offset value (Offset NW-TT), thereby enabling time synchronization of the NW-TT module and the GM.

The invention discloses a chip internal reference clock frequency adjusting device and a chip. The chip internal reference clock frequency adjusting device comprises a system clock generating circuit; a system non-volatile memory circuit; the enable register is used for enabling the backup function of the backup register; the backup register is used for backing up an IRC frequency modulation control word currently used by an internal IRC clock source of the system clock generation circuit when the backup function of the backup register is enabled and a deep low power consumption mode request instruction is received; the alignment module is connected with the enable register, the backup register, the system non-volatile storage circuit and the system clock generation circuit and is used for aligning the system non-volatile storage circuit before the backup function of the backup register is enabled, the system receives a deep low-power-consumption wake-up request and the initialization of the system non-volatile storage circuit is finished; and IRC frequency modulation control words backed up by the backup register are selected to control the starting frequency of an internal IRC clock source of the system clock generation circuit. According to the device, the on-chip internal reference clock source is quickly adjusted, and the system wake-up time is shortened.

To suppress current consumption of a processor from exceeding an upper limit when each of a plurality of cores variably controls a clock frequency and a power supply voltage.SOLUTION: In a processor comprising a plurality of cores including floating-point units, a frequency / voltage control unit provided corresponding to each core supplies the corresponding core with a clock having a variable frequency and a power-supply voltage having a variable voltage. An instruction issuance control unit provided in each core controls the issuance of floating-point operation instructions to the floating-point unit, and reduces the issuance frequency of floating-point operation instructions to the floating-point unit when the current frequency value is greater than a reference frequency value or when the current power-supply voltage value is greater than a reference power-supply voltage value. This makes it possible to prevent the current consumption of the processor from exceeding an upper limit.SELECTED DRAWING: Figure 2