CN110324026A - A kind of clock frequency detection method of chip interior clock source - Google Patents
A kind of clock frequency detection method of chip interior clock source Download PDFInfo
- Publication number
- CN110324026A CN110324026A CN201910547993.7A CN201910547993A CN110324026A CN 110324026 A CN110324026 A CN 110324026A CN 201910547993 A CN201910547993 A CN 201910547993A CN 110324026 A CN110324026 A CN 110324026A
- Authority
- CN
- China
- Prior art keywords
- clock
- clock source
- frequency
- signal
- standard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/19—Monitoring patterns of pulse trains
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Manipulation Of Pulses (AREA)
Abstract
The invention discloses a kind of clock frequency detection method of chip interior clock source, the detection method includes: the standard clock signal for obtaining predeterminated frequency and the first clock source signals of chip interior；First clock source signals of chip interior are divided, second clock source signal is obtained；In the predetermined period of the standard clock signal, the period of the second clock source signal is counted, the count value of predetermined number is obtained；According to the count value, standard clock signal frequency and frequency division coefficient, clock source signals frequency is obtained.It, can be with the convenient accurate clock frequency for obtaining chip interior clock source using the present invention.
Description
Technical field
The present invention relates to clock frequency detection fields, detect more particularly to a kind of clock frequency of chip interior clock source
Method.
Background technique
In a chip design, in order to reduce chip cost, no crystal oscillator is increasingly becoming the designer trends of low side chip.In core
In the throwing piece of piece, multi-project wafer (Multi Project Wafer, abbreviation MPW) is by multiple integrated electricity with same process
The flow on same wafer is designed on road, obtains various chips sample.This MPW chip can substantially reduce integrated circuit research and development expense
With, but because not passing through formal CP volume production testing process, chip after plant produced processing not by the parameter testing of system and
Hardware configuration process can not learn the clock frequency of chip interior clock source.
Currently, mainly by the clock output pin of manual testing's MPW chip come indirectly testing chip interior clock source
Clock frequency, in manual testing, it is necessary first to software configuration chip clock output GPIO pin be clkout clock it is defeated
Out, digital oscilloscope is then used, observation survey with the naked eye is carried out to the clock output pin of each chip by the way of artificial
Amount, also wants artificial recording clock numerical value, then can just obtain the actual value of clock by conversion again.In addition, since clock can be
Concussion in a certain range, when being observed using digital oscilloscope, the clock that digital oscilloscope is shown is continuous concussion bounce
?.Therefore, by the method for manual testing, error can be bigger, and that there are the degree of automation is low, operational sequence is many and diverse,
Therefore the problems such as inefficiency, needs a kind of clock frequency detection method of the chip interior clock source of simplicity.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide a kind of clock frequency detection sides of chip interior clock source
Method, can be with convenient accurate detection chip interior clock source frequency.
Based on this, the present invention provides a kind of clock frequency detection method of chip interior clock source, the detection methods
Include:
Obtain the standard clock signal of predeterminated frequency and the first clock source signals of chip interior；
First clock source signals of chip interior are divided, second clock source signal is obtained；
In the predetermined period of the standard clock signal, the period of the second clock source signal is counted, is obtained
Take the count value of predetermined number；
According to the count value, standard clock signal frequency and frequency division coefficient, clock source signals frequency is obtained.
Wherein, the standard clock signal for obtaining predeterminated frequency includes:
The square-wave signal of predeterminated frequency is generated using low frequency pulse signal generator；
Obtain the square-wave signal.
Wherein, in the predetermined period of the standard clock signal, the period of the second clock source signal is counted
Number includes:
When the rising edge or failing edge that detect the standard clock signal or it is bilateral along when, record the clock source
The number of cycles of signal；
When the next rising edge or failing edge that detect the standard clock signal or it is bilateral along when, stop
The number of cycles of the clock source signals is recorded, count value is obtained.
Wherein, in the predetermined period of the standard clock signal, the period of the second clock source signal is counted
Number further include:
In the predetermined period of the standard clock signal, the period of the second clock source signal is carried out counting it
Afterwards, counting value returns, again in next predetermined period of the standard clock signal, to the second clock source signal
Period is counted.
Wherein, after the count value for obtaining predetermined number, stop obtaining the standard clock signal and chip interior
The first clock source signals.
Wherein, the first clock source signals of the chip interior are carried out frequency dividing includes:
Obtain the first clock source signals of the chip interior；
First clock source signals are inputted into frequency divider, according to preset frequency division coefficient, first clock source is believed
It number is divided.
Wherein, described according to the count value, standard clock signal frequency and pre- frequency division coefficient, obtain clock source signals frequency
Rate includes:
Obtain the difference of adjacent count value；
Obtain the average value of the difference；
After the average value is rounded up, the first product is obtained with the standard clock signal frequency multiplication,
First product is multiplied with the pre- frequency division coefficient and obtains the second product, is believed using second product as the clock source
Number frequency.
The present invention also provides a kind of clock frequency detection device of chip interior clock source, described device includes:
Module is obtained, for obtaining the standard clock signal of predeterminated frequency and the first clock source signals of chip interior；
Frequency division module divides the first clock source signals of chip interior, obtains second clock source signal；
Counting module, for obtaining the standard clock signal and the second clock source signal, and in the standard
In the predetermined period of clock signal, the period of the second clock source signal is counted, the count value of predetermined number is obtained；
Computing module, for obtaining clock source signals according to the count value, standard clock signal frequency and frequency division coefficient
Frequency.
The present invention also provides a kind of computer equipment, including memory and processor, the memory is stored with calculating
Machine program, sign are, when the processor executes the computer program the step of realization above method.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, which is characterized in that
The step of above method is realized when the computer program is executed by processor.
Operation of the present invention is simple, and the clock frequency of automatic detection chip internal clock source may be implemented, first described in acquisition
Standard clock signal and the second clock source signal, and in the predetermined period of the standard clock signal, to described second
The period of clock source signals is counted, after the count value for obtaining predetermined number, stop obtaining the standard clock signal and
First clock source signals of chip interior can save electric energy, the clock frequency acquisition methods letter of the chip interior clock source
It is single, convenient for the user to operate and implementation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of the clock frequency detection method of chip interior clock source provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the clock frequency detection device of chip interior clock source provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the schematic diagram of the clock frequency detection method of chip interior clock source provided in an embodiment of the present invention, described
Method includes:
The first clock source signals of S101, the standard clock signal for obtaining predeterminated frequency and chip interior；
The standard clock signal for obtaining predeterminated frequency may include: to generate such as frequency using low frequency pulse signal generator
The standard clock signal is obtained after waveform is the calibration pulse signal of square wave for 1kHz.
S102, the first clock source signals of chip interior are divided, obtains second clock source signal；
After the first clock source signals for obtaining the chip interior, first clock source signals are inputted into frequency divider,
According to preset frequency division coefficient, first clock source signals are divided, obtain second clock source signal.
S103, in the predetermined period of the standard clock signal, the period of the second clock source signal is counted
Number, obtains the count value of predetermined number；
In the predetermined period of the standard clock signal, counting packet is carried out to the period of the second clock source signal
It includes:
When the rising edge or failing edge that detect the standard clock signal or it is bilateral along when, described in start recording
The number of cycles of two clock source signals obtains count value；
When the next rising edge or failing edge that detect the standard clock signal or it is bilateral along when, stop
The number of cycles for recording the second clock source signal, the number of cycles for obtaining the second clock source signal obtain the meter
Numerical value.
In the predetermined period of the standard clock signal, the period of the second clock source signal is carried out counting it
Afterwards, counting value returns, again in next predetermined period of the standard clock signal, to the second clock source signal
Period is counted.
After the count value for obtaining predetermined number, when stopping obtaining the first of the standard clock signal and chip interior
Clock source signal.
S104, according to the count value, standard clock signal frequency and frequency division coefficient, obtain clock source signals frequency.
Obtaining clock source signals frequency according to the count value, standard clock signal frequency and frequency division coefficient includes:
Obtain the difference of adjacent count value；
Obtain the average value of the difference；
After the average value is rounded up, the first product is obtained with the standard clock signal frequency multiplication,
First product is multiplied with the frequency division coefficient and obtains the second product, using second product as the clock source signals
Frequency.
For example, five count values, respectively a, b, c, d, e are obtained, the difference for obtaining adjacent count value is exactly a-
B, the difference is averaged i.e. A=1/4 × [(a-b)+(b-c)+(c-d)+(d-e)] by b-c, c-d, d-e, and will be described
Average value A is rounded up to obtain B, C will be obtained after the frequency multiplication of the B and the standard clock signal, by the C
D is obtained after being multiplied with the preset division coefficient of the clock source signals, the D is the clock source signals frequency.
Obtaining clock source signals frequency according to the count value, standard clock signal frequency and frequency division coefficient can also wrap
It includes:
Obtain the standard deviation of the count value；
The difference between the difference and the standard deviation is obtained, and obtains the absolute value of the difference, is removed described exhausted
To in value exceed absolute value threshold value corresponding to count value；
Obtain the difference of adjacent count value in remaining count value；
Obtain the average value of the difference of the adjacent count value；
After the average value is rounded up, the first product is obtained with the standard clock signal frequency multiplication,
First product is multiplied with the frequency division coefficient and obtains the second product, using second product as the clock source signals
Frequency.
For example, seven count values, respectively a, b, c, d, e, f, g are obtained, obtain seven count values first
Standard deviation, the standard deviation of described a, b, c, d, e, f, g is M, obtains the difference between the difference and the standard deviation, i.e. a-
M, b-M, c-M, d-M, e-M, f-M, g-M obtain the absolute value of the difference, i.e., | a-M |, | b-M |, | c-M |, | d-M |, | e-M
|, | f-M |, | g-M |, remove the absolute value beyond count value corresponding to absolute value threshold value, wherein | f-M |, | g-M | it is exhausted
Absolute value threshold value is exceeded to value, therefore removes f and g, remaining five count values, respectively a, b, c, d, e obtain adjacent count value
Difference is exactly a-b, b-c, c-d, d-e, and the difference is averaged i.e. A=1/4 × [(a-b)+(b-c)+(c-d)+(d-
E) it], and by the average value A is rounded up to obtain B, it will be after the frequency multiplication of the B and the standard clock signal
C is obtained, D is obtained after the C is multiplied with the preset division coefficient of the clock source signals, the D is the clock source letter
Number frequency.
Operation of the present invention is simple, and the clock frequency of automatic detection chip internal clock source may be implemented, first described in acquisition
Standard clock signal and the second clock source signal, and in the predetermined period of the standard clock signal, to described second
The period of clock source signals is counted, after the count value for obtaining predetermined number, stop obtaining the standard clock signal and
First clock source signals of chip interior can save electric energy, the clock frequency acquisition methods letter of the chip interior clock source
It is single, convenient for the user to operate and implementation.
Fig. 2 is the schematic diagram of the clock frequency detection device of chip interior clock source provided in an embodiment of the present invention, described
Device includes:
Module 201 is obtained, for obtaining the standard clock signal of predeterminated frequency and the first clock source signals of chip interior；
Frequency division module 202 divides the first clock source signals of chip interior, obtains second clock source signal；
Counting module 203, for obtaining the standard clock signal and the second clock source signal, and in the standard
In the predetermined period of clock signal, the period of the second clock source signal is counted, the count value of predetermined number is obtained；
Computing module 204, for obtaining clock source according to the count value, standard clock signal frequency and frequency division coefficient
Signal frequency.
Described device further includes display module, and the display module is connected with the computing module, and the display module is used
In the clock source signals frequency for showing that the computing module obtains.
Described device can also include input module, and the input module is connected with the display module, the input mould
Block may include key, can be used for inputting the information such as the number, model, title of chip to be measured, when the chip interior to be measured
After the signal frequency of Zhong Yuan is detected, it can be shown in the display module in the clock frequency detection device, and
The display module can also show the corresponding chip title of the clock, number, model etc., and frequently by the clock source signals
The signals such as rate and corresponding chip title, number, model store, and user is facilitated to check at any time.
Wherein, the computing module can send the signal of operation completion extremely after the count value for obtaining predetermined number
The acquisition module and the counting module.
After the acquisition module receives the signal that the operation is completed, stop obtaining the standard clock signal.
After the counting module receives the signal that the operation is completed, the counter of the counting module stops counting.
The present embodiment is used for detection chip internal clocking source frequency, easy to operate, it can be achieved that automatic detection, and can will
Clock source frequency and corresponding chip title, number, model etc. display and store, and the accuracy of clock frequency detection is high,
After the completion of detection, the computing module in the clock frequency detection device sends operation and completes signal to the acquisition module and institute
Counting module is stated to stop working, save after the acquisition module and the counting module receive the operation completion signal
Electric energy.
The embodiment of the present invention also proposes a kind of storage medium, is stored thereon with computer program, and the program is by processor
The step of above method is realized when execution.
In addition, the embodiment of the present invention also proposes a kind of computer equipment, including memory, processor and it is stored in
On reservoir and the computer program that can run on a processor, wherein the processor realizes above-mentioned side when executing described program
The step of method.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.
The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings
Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of clock frequency detection method of chip interior clock source characterized by comprising
Obtain the standard clock signal of predeterminated frequency and the first clock source signals of chip interior；
First clock source signals of chip interior are divided, second clock source signal is obtained；
In the predetermined period of the standard clock signal, the period of the second clock source signal is counted, is obtained pre-
If the count value of number；
According to the count value, standard clock signal frequency and frequency division coefficient, clock source signals frequency is obtained.
2. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that described to obtain in advance
If the standard clock signal of frequency includes:
The square-wave signal of predeterminated frequency is generated using low frequency pulse signal generator；
Obtain the square-wave signal.
3. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that in the standard
In the predetermined period of clock signal, carrying out counting to the period of the second clock source signal includes:
When the rising edge or failing edge that detect the standard clock signal or it is bilateral along when, record the clock source signals
Number of cycles；
When the next rising edge or failing edge that detect the standard clock signal or it is bilateral along when, stop recording
The number of cycles of the clock source signals obtains count value.
4. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that in the standard
In the predetermined period of clock signal, the period of the second clock source signal is counted further include:
In the predetermined period of the standard clock signal, after being counted to the period of the second clock source signal, meter
Numerical value zero, again in next predetermined period of the standard clock signal, to the period of the second clock source signal
It is counted.
5. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that described to obtain in advance
If after the count value of number, stopping the first clock source signals for obtaining the standard clock signal and chip interior.
6. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that by the chip
The first internal clock source signals carry out frequency dividing
Obtain the first clock source signals of the chip interior；
First clock source signals are inputted into frequency divider, according to preset frequency division coefficient, to first clock source signals into
Row frequency dividing.
7. the clock frequency detection method of chip interior clock source as described in claim 1, which is characterized in that described according to institute
Count value, standard clock signal frequency and pre- frequency division coefficient are stated, obtaining clock source signals frequency includes:
Obtain the difference of adjacent count value；
Obtain the average value of the difference；
After the average value is rounded up, the first product is obtained with the standard clock signal frequency multiplication, by institute
State the first product and be multiplied with the pre- frequency division coefficient and obtain the second product, will second product as the clock source signals frequently
Rate.
8. a kind of clock frequency detection method of chip interior clock source characterized by comprising
Module is obtained, for obtaining the standard clock signal of predeterminated frequency and the first clock source signals of chip interior；
Frequency division module divides the first clock source signals of chip interior, obtains second clock source signal；
Counting module is believed for obtaining the standard clock signal and the second clock source signal, and in the standard time clock
Number predetermined period in, the period of the second clock source signal is counted, the count value of predetermined number is obtained；
Computing module, for obtaining clock source signals frequency according to the count value, standard clock signal frequency and frequency division coefficient
Rate.
9. a kind of computer equipment, including memory and processor, the memory is stored with computer program, and sign is,
The step of processor realizes any one of claims 1 to 7 the method when executing the computer program.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of any one of claims 1 to 7 the method is realized when being executed by processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547993.7A CN110324026A (en) | 2019-06-21 | 2019-06-21 | A kind of clock frequency detection method of chip interior clock source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547993.7A CN110324026A (en) | 2019-06-21 | 2019-06-21 | A kind of clock frequency detection method of chip interior clock source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110324026A true CN110324026A (en) | 2019-10-11 |
Family
ID=68121170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910547993.7A Pending CN110324026A (en) | 2019-06-21 | 2019-06-21 | A kind of clock frequency detection method of chip interior clock source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110324026A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026232A (en) * | 2019-11-08 | 2020-04-17 | 深圳市汇顶科技股份有限公司 | Clock calibration method, chip and electronic equipment |
| CN111665431A (en) * | 2020-04-26 | 2020-09-15 | 江西联智集成电路有限公司 | Method, device, equipment and medium for calibrating clock source in chip |
| CN112540665A (en) * | 2020-12-25 | 2021-03-23 | 瓴盛科技有限公司 | Memory frequency switching device and method |
| CN113156799A (en) * | 2021-02-26 | 2021-07-23 | 合肥宏晶微电子科技股份有限公司 | Clock testing method and device, mass production testing method and testing platform |
| CN114924119A (en) * | 2022-07-21 | 2022-08-19 | 深圳市英特瑞半导体科技有限公司 | Clock chip and frequency measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365336A (en) * | 2013-06-24 | 2013-10-23 | 深圳市文鼎创数据科技有限公司 | Calibration method and device for system clock of USB equipment |
| CN104901687A (en) * | 2015-05-20 | 2015-09-09 | 珠海市杰理科技有限公司 | Method and system for calibrating clock frequency |
| CN106597096A (en) * | 2016-12-02 | 2017-04-26 | 武汉新芯集成电路制造有限公司 | Clock frequency monitoring method |
| US20180120364A1 (en) * | 2016-10-28 | 2018-05-03 | Samsung Electro-Mechanics Co., Ltd. | Digital frequency measuring apparatus |
| CN109067394A (en) * | 2018-09-05 | 2018-12-21 | 深圳芯之联科技有限公司 | On piece clock calibrating device and calibration method |
-
2019
- 2019-06-21 CN CN201910547993.7A patent/CN110324026A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103365336A (en) * | 2013-06-24 | 2013-10-23 | 深圳市文鼎创数据科技有限公司 | Calibration method and device for system clock of USB equipment |
| CN104901687A (en) * | 2015-05-20 | 2015-09-09 | 珠海市杰理科技有限公司 | Method and system for calibrating clock frequency |
| US20180120364A1 (en) * | 2016-10-28 | 2018-05-03 | Samsung Electro-Mechanics Co., Ltd. | Digital frequency measuring apparatus |
| CN106597096A (en) * | 2016-12-02 | 2017-04-26 | 武汉新芯集成电路制造有限公司 | Clock frequency monitoring method |
| CN109067394A (en) * | 2018-09-05 | 2018-12-21 | 深圳芯之联科技有限公司 | On piece clock calibrating device and calibration method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026232A (en) * | 2019-11-08 | 2020-04-17 | 深圳市汇顶科技股份有限公司 | Clock calibration method, chip and electronic equipment |
| CN111665431A (en) * | 2020-04-26 | 2020-09-15 | 江西联智集成电路有限公司 | Method, device, equipment and medium for calibrating clock source in chip |
| CN112540665A (en) * | 2020-12-25 | 2021-03-23 | 瓴盛科技有限公司 | Memory frequency switching device and method |
| CN112540665B (en) * | 2020-12-25 | 2023-05-02 | 瓴盛科技有限公司 | Memory frequency switching device and method |
| CN113156799A (en) * | 2021-02-26 | 2021-07-23 | 合肥宏晶微电子科技股份有限公司 | Clock testing method and device, mass production testing method and testing platform |
| CN113156799B (en) * | 2021-02-26 | 2022-11-25 | 宏晶微电子科技股份有限公司 | Clock testing method and device, mass production testing method and testing platform |
| CN114924119A (en) * | 2022-07-21 | 2022-08-19 | 深圳市英特瑞半导体科技有限公司 | Clock chip and frequency measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110308762A (en) | A kind of clock frequency calibration method of chip interior clock source | |
| CN110324026A (en) | A kind of clock frequency detection method of chip interior clock source | |
| CN103248356B (en) | A kind of counter and implementation method based on adopting phase-locked loop pulse interpolation technology | |
| CN102879641A (en) | Frequency measurement method and system | |
| CN101685135B (en) | Test device and test method for testing circuit board | |
| CN103837741B (en) | Equally accurate frequency testing system based on FPGA and method for designing thereof | |
| CN100516898C (en) | High precision clock detecting method and testing apparatus | |
| CN103487649B (en) | Method and device capable of measuring both frequency of continuous waves and frequency of pulse modulation carrier waves | |
| CN101644754A (en) | Calibration console for electric energy meter | |
| CN202362380U (en) | Multifunctional high-precision digital frequency meter | |
| CN101976037A (en) | Method and device for measuring time intervals of repeated synchronous interpolation simulation | |
| CN108037656A (en) | Real-time timepiece chip calibration method, device and terminal device | |
| CN110069009A (en) | Multichannel time-to-digit converter and Electro-Optical Sensor Set | |
| CN109471154B (en) | Small-size GM count pipe wide range monitoring instrument | |
| CN104518839A (en) | Frequency deviation detecting method and device | |
| TW201303532A (en) | Method and system for measuring time | |
| CN100498234C (en) | Sensor signal processor | |
| CN101556325A (en) | Method for quickly verifying electric energy error | |
| CN102098051B (en) | Method and system for sampling high-frequency periodic signals | |
| CN104483544B (en) | Single channel counter high accuracy frequency/period measuring method | |
| CN109471151A (en) | Signal processing method, device and user terminal | |
| CN203929885U (en) | Based on FPGA etc. precision frequency testing system | |
| CN105653238A (en) | Timing method and apparatus | |
| CN106840245B (en) | A kind of encoder quality determining method and device | |
| CN100427958C (en) | Agitating measuring device and measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191011 |