CN207367607U - A kind of EEPROM test fixtures - Google Patents
A kind of EEPROM test fixtures Download PDFInfo
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- CN207367607U CN207367607U CN201721343031.2U CN201721343031U CN207367607U CN 207367607 U CN207367607 U CN 207367607U CN 201721343031 U CN201721343031 U CN 201721343031U CN 207367607 U CN207367607 U CN 207367607U
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- chip
- eeprom
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- energy meter
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Abstract
The utility model discloses a kind of EEPROM test fixtures, which includes the serial communication module of computer host computer, the test fixture and computer the host computer communication for showing test data, for receiving electric energy meter to 7 pieces of ARM auxiliary cores pieces of eeprom chip operation data and 1 piece of ARM master chip, power circuit, the external RAM for storage operation number evidence and the eeprom chip seat for placing eeprom chip to test fixture offer power supply.EEPROM test fixtures are accessed between electric energy meter and eeprom chip, the security and correctness of test electric energy meter storage, circuit structure is simple, using flexible.
Description
Technical field
It the utility model is related to electric energy meter memory technology field, and in particular to a kind of for electronic electric energy meter
The EEPROM test fixtures that eeprom memory is tested.
Background technology
With the continuous development of electronic technology, the function of electronic electric energy meter is maked rapid progress, and function becomes increasingly complex, storage
Data volume it is more and more, such as the moon using electricity, year using the data such as electricity, amount preservation.The data of preservation are got over
Come more, certainly will can more consider whether the position of the reading and writing data of eeprom memory is correct, the read-write of eeprom memory
Whether data value is correct, therefore the point tested eeprom memory needs is more more, this will be one for test man
Very arduous very time-consuming task.
In the prior art, the Chinese invention patent of Publication No. CN105738855A discloses a kind of embedding towards intelligent electric meter
Enter the test method of formula application, the storage chip unit and computation chip unit of ammeter can be tested, including：Store core
Piece stores the piecemeal of different pieces of information, storage strategy when EEPROM cannot write；Whether intelligent electric meter significant data has backup；Deposit
Reservoir significant data is destroyed could self- recoverage；Whether storage data have overflow error.Essence does not solve the strategy that this method provides
The certainly eeprom memory test data safety issue of ammeter.
Traditional test method is to remove eeprom memory chip and changing the data of the inside, then by eeprom chip
Weld back on electric energy meter, electric energy meter power up test.The data volume that often test eeprom memory chip will preserve, Dou Yaoru
Upper repetition is done one time, and the electric energy meter of a sophisticated functions may need to test a data volumes up to a hundred, and such workload is especially big.
And in the case where test electric energy meter is had good luck for a long time, also without monitoring that whole eeprom memory chip preserves, this is also
It is a security risk.
Utility model content
Safe and reliable simple and convenient, the utility model is provided in order to solve the deficiency of above-mentioned testing reliability and efficiency
Provide a kind of wide test EEPROM frocks of use scope.Compared with common testing procedures, testing efficiency is improved, is widened
Range is tested, is also more less likely to be damaged electric energy meter.
To achieve these goals, the utility model adopts the following technical solution.
The utility model discloses a kind of EEPROM test fixtures, access between electric energy meter and eeprom chip, for surveying
The security and correctness of electric energy meter storage are tried, circuit structure is simple, using flexible, and realization principle is：By electric energy meter with
EEPROM test fixtures are accessed between eeprom chip, monitor data of the electric energy meter to eeprom chip this link, and
Shown by computer host computer.
The EEPROM test fixtures of the utility model include being used for computer host computer, the test fixture for showing test data
With computer host computer communication serial communication module, for receiving 7 piece ARM auxiliary cores of the electric energy meter to eeprom chip operation data
Piece and 1 piece of ARM master chip, the power circuit that power supply is provided to the test fixture, the external RAM for storage operation number evidence and put
Put the eeprom chip seat of eeprom chip；7 pieces of ARM auxiliary cores pieces and 1 piece of ARM master chip connect RX and TX in a series arrangement
Pin simultaneously connects computer host computer by serial communication module, and the I/O port of 1 piece of ARM master chip is connected with external RAM.
Preferably, the test test fixture is additionally provided with multigroup single contact pin.
In any of the above-described technical solution preferably, the single contact pin of the test fixture include the first single contact pin J10,
Second single contact pin J6.
In any of the above-described technical solution preferably, which is additionally provided with relay HF1, button S1, communication
Chip IC 7, the first optocoupler U2 and the second optocoupler U3.
In any of the above-described technical solution preferably, the eeprom chip position on the wiring board of the electric energy meter
Copper sheet be connected respectively with the first single contact pin J10 of the test fixture, the USB line of the test fixture and the string of computer host computer
Mouth communication module is connected, and eeprom chip is put into the eeprom chip seat of the test fixture, passes through computer host computer and shows electricity
Energy table is to eeprom chip operation monitoring.
In any of the above-described technical solution preferably, the external RAM includes the 8th chip IC 16, the 9th chip
IC17, the tenth chip IC 18, the 8th chip IC 16 respectively with the 9th chip IC 17, the tenth chip IC 18 and place eeprom chip
Eeprom chip seat connect and compose the circuit that data when being tested for EEPROM are saved into the external RAM of eeprom chip.
In any of the above-described technical solution preferably, 7 pieces of ARM auxiliary cores piece includes the second chip IC 8, fourth chip
IC12, the 6th chip IC 14, the 6th chip IC 14, the first chip IC 5, the 3rd chip IC 11, fifth chip IC13, the 8th chip
IC16 is connected with the second chip IC 8, the second chip IC 8 is connected with fourth chip IC12, fourth chip IC12 and the 6th chip
IC14 connections, the 6th chip IC 14 are connected with the first chip IC 5, the first chip IC 5 is connected with the 3rd chip IC 11, the 3rd chip
IC11 is connected with fifth chip IC13, fifth chip IC13 is connected with the 7th chip IC 15 and together constitutes electric energy meter to EEPROM
Read and write 7 pieces of auxiliary chip circuits of ARM of data transfer operation.
In any of the above-described technical solution preferably, the first single contact pin J10 of the test fixture respectively with the first core
Piece IC5, the second chip IC 8, the 3rd chip IC 11, fourth chip IC12, fifth chip IC13, the 6th chip IC 14, the 7th core
Piece IC15, the 8th chip IC 16 connect and compose 1 piece of ARM master chip, when which constitutes electric energy meter read-write EEPROM
Electric energy meter and the test fixture between link.
In any of the above-described technical solution preferably, the 8th chip IC 16 is connected structure with relay HF1, button S1
Into key-press module, the operation of electric energy meter power-on and power-off is controlled.
In any of the above-described technical solution preferably, the second single contact pin J6 connects and composes this with computer host computer
The communication of test fixture and computer host computer.
In any of the above-described technical solution preferably, the 9th chip IC 17 is external using is63wv1024bli types
RAM chip.
In any of the above-described technical solution preferably, the test fixture and computer host computer pass through the first optocoupler U2 and the
Two optocoupler U3 isolate, protection computer host computer serial ports safety.
In any of the above-described technical solution preferably, the power circuit includes battery VBAT.
The EEPROM test fixtures of the utility model, are related to using IIC communications as the eeprom chip of agreement and leading to for host
The monitoring of news, especially a kind of electronic electric energy meter store the monitoring using IIC communications as the EEPROM information of agreement.This practicality is new
The frock for being used to test electric energy meter security of data storage and correctness of type, accesses work between electric energy meter and eeprom chip
Dress, realizes the specific data of monitoring electric energy meter read-write EEPROM in real time, and then frock is connected with computer serial port, sends the data to
Computer, is intuitively shown by host computer.The test fixture of the utility model realizes 512kbit and following all
The function for monitoring of EEPROM, safe, reliable and convenient simple, which can be not only used for having good luck for a long time, test ammeter pair
EEPROM operates correctness, and timing of the once mounting with regard to that can complete ammeter preserves, the institute that lower electricity preserves and EEPROM is preserved
There is test.
Compared with common testing procedures of the prior art, the above-mentioned technical proposal of the utility model, improves test effect
Rate, has widened test range, has also more been less likely to be damaged ammeter.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the principle schematic according to a preferred embodiment of the EEPROM test fixtures of the utility model；
Fig. 2 is the main boundary after being opened according to the host computer of a preferred embodiment of the EEPROM test fixtures of the utility model
Face schematic diagram；
Fig. 3 is after being traveled through for the first time according to the host computer of a preferred embodiment of the EEPROM test fixtures of the utility model
Interface schematic diagram；
Fig. 4 is to be powered on according to the host computer of a preferred embodiment of the EEPROM test fixtures of the utility model in electric energy meter
The interface schematic diagram of data is got after communicating afterwards；
Fig. 5 is to double-click right-hand column according to the host computer of a preferred embodiment of the EEPROM test fixtures of the utility model to put
The interface schematic diagram shown greatly；
Fig. 6 is the power pack theory structure according to a preferred embodiment of the EEPROM test fixtures of the utility model
Figure；
Fig. 7 is the main RAM chip theory structure according to a preferred embodiment of the EEPROM test fixtures of the utility model
Figure；
Fig. 8 to Figure 10 is 7 pieces of auxiliary RAM principles according to a preferred embodiment of the EEPROM test fixtures of the utility model
Structure chart；
Figure 11 is the external storage SRAM principles according to a preferred embodiment of the EEPROM test fixtures of the utility model
Structure chart；
Figure 12 is the serial communication and relay according to a preferred embodiment of the EEPROM test fixtures of the utility model
Control principle structure chart；
Figure 13 is the eeprom chip seat and work according to a preferred embodiment of the EEPROM test fixtures of the utility model
Fill single contact pin and the CP2102 principle assumption diagram being connected with electric energy meter；
Figure 14 is to refer to according to 8 pieces of ARM chip communications of a preferred embodiment of the EEPROM test fixtures of the utility model
Show lamp principle assumption diagram.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
In order to solve the test of the eeprom memory of electronic electric energy meter the problems of in the prior art, this practicality
New embodiment proposes the EEPROM test fixtures that a kind of eeprom memory for electronic electric energy meter is tested,
EEPROM test fixtures described in the utility model embodiment, circuit structure is simple, using flexible, realization principle
For：By between electric energy meter and eeprom chip access EEPROM test fixtures, monitor electric energy meter to eeprom chip this
Data on link, and shown by computer host computer.
Embodiment 1
EEPROM test fixtures described in the present embodiment, are accessed between electric energy meter and eeprom chip, for testing electric energy
Table storage security and correctness, as shown in Figure 1, the test fixture include be used for show test data computer host computer,
The serial communication module of the test fixture and computer host computer communication, for receiving electric energy meter to eeprom chip operation data
7 pieces of ARM auxiliary cores pieces and 1 piece of ARM master chip, provide to the test fixture power circuit of power supply, for storage operation number evidence
External RAM and the eeprom chip seat for placing eeprom chip；7 pieces of ARM auxiliary cores pieces and 1 piece of ARM master chip connect in a series arrangement
Connect RX with TX pins and computer host computer is connected by serial communication module, the I/O port of 1 piece of ARM master chip connects with external RAM
Connect.
EEPROM test fixtures described in the present embodiment, the test test fixture are additionally provided with multigroup single contact pin.
EEPROM test fixtures described in the present embodiment, the single contact pin of the test fixture include the first single contact pin J10,
Second single contact pin J6.
EEPROM test fixtures described in the present embodiment, the test test fixture are additionally provided with relay HF1, button
S1, communication chip IC7, the first optocoupler U2 and the second optocoupler U3.
EEPROM test fixtures described in the present embodiment, the copper of the eeprom chip position on the wiring board of electric energy meter
Skin is connected with the first single contact pin J10 of the test fixture respectively, and the serial ports of the USB line and computer host computer of the test fixture leads to
News module is connected, and eeprom chip is put into the eeprom chip seat of the test fixture, and electric energy meter is shown by computer host computer
To eeprom chip operation monitoring.
EEPROM test fixtures described in the present embodiment, external RAM include the 8th chip IC 16, the 9th chip IC 17, the
Ten chip ICs 18, the 8th chip IC 16 is respectively with the 9th chip IC 17, the tenth chip IC 18 and placing eeprom chip
Eeprom chip seat connects and composes the circuit that data when being tested for EEPROM are saved into the external RAM of eeprom chip.
EEPROM test fixtures described in the present embodiment, 7 pieces of ARM auxiliary cores pieces include the second chip IC 8, fourth chip
IC12, the 6th chip IC 14, the 6th chip IC 14, the first chip IC 5, the 3rd chip IC 11, fifth chip IC13, the 8th chip
IC16 is connected with the second chip IC 8, the second chip IC 8 is connected with fourth chip IC12, fourth chip IC12 and the 6th chip
IC14 connections, the 6th chip IC 14 are connected with the first chip IC 5, the first chip IC 5 is connected with the 3rd chip IC 11, the 3rd chip
IC11 is connected with fifth chip IC13, fifth chip IC13 is connected with the 7th chip IC 15 and together constitutes electric energy meter to EEPROM
Read and write 7 pieces of auxiliary chip circuits of ARM of data transfer operation.
EEPROM test fixtures described in the present embodiment, the first single contact pin J10 of the test fixture respectively with the first core
Piece IC5, the second chip IC 8, the 3rd chip IC 11, fourth chip IC12, fifth chip IC13, the 6th chip IC 14, the 7th core
Piece IC15, the 8th chip IC 16 connect and compose 1 piece of ARM master chip, when which constitutes electric energy meter read-write EEPROM
Electric energy meter and the test fixture between link.
EEPROM test fixtures described in the present embodiment, the 8th chip IC 16 are connected and composed and pressed with relay HF1, button S1
Key module, controls the operation of electric energy meter power-on and power-off.
EEPROM test fixtures described in the present embodiment, the second single contact pin J6 connect and compose the test with computer host computer
Frock and the communication of computer host computer.
EEPROM test fixtures described in the present embodiment, the 9th chip IC 17 use the external RAM cores of is63wv1024bli types
Piece.
EEPROM test fixtures described in the present embodiment, the test fixture and computer host computer pass through the first optocoupler U2 and the
Two optocoupler U3 isolate, protection computer host computer serial ports safety.
EEPROM test fixtures described in the present embodiment, power circuit include battery VBAT.
EEPROM test fixtures described in the present embodiment, are a kind of works for the storage security and correctness for testing electric energy meter
Dress.Frock is accessed between electric energy meter and eeprom chip, realizes the specific data of monitoring electric energy meter read-write EEPROM in real time, then
Frock is connected with computer serial port, sends the data to computer, is intuitively shown by computer host computer.The frock realizes
The function for monitoring of 512kbit and following all EEPROM.Safe, reliable and convenient simple, which can be not only used for growing
Time has good luck, and test electric energy meter operates EEPROM correctness, and timing of the once mounting with regard to that can complete electric energy meter preserves, under
All tests that electricity preserves and EEPROM is preserved.On the wiring board of electric energy meter EEPROM positions copper sheet respectively with test fixture
The first single contact pin J10 be connected, the USB line of test fixture is connected with computer serial port, and eeprom chip is put into test job
In eeprom chip seat.Show electric energy meter to EEPROM operation monitorings by computer host computer.Electricity involved in the test fixture
Road include placing eeprom chip seat IC9, the first chip IC 5, the second chip IC 8, the 3rd chip IC 11, fourth chip IC12,
Fifth chip IC13, the 6th chip IC 14, the 7th chip IC 15, the 8th chip IC 16, the 9th chip IC 17, the tenth chip
IC18, relay HF1, button S1, communication chip IC7, battery VBAT, the second single contact pin J6, the first optocoupler U2, the second light
Coupling U3；8th chip IC 16 is connected and composed with placing eeprom chip seat IC9, the 9th chip IC 17, the tenth chip IC 18 respectively
EEPROM data are saved into the circuit of eeprom chip and external RAM；8th chip IC 16 is connected with the second chip IC 8, and second
Chip IC 8 is connected with fourth chip IC12, and fourth chip IC12 is connected with the 6th chip IC 14, the 6th chip IC 14 and the first core
Piece IC5 connections, the first chip IC 5 are connected with the 3rd chip IC 11, and the 3rd chip IC 11 is connected with fifth chip IC13, the 5th core
Piece IC13 is connected with the 7th chip IC 15 collectively forms electric energy meter to EEPROM read-write data transfer operations；First single contact pin
J10 respectively with the first chip IC 5, the second chip IC 8, the 3rd chip IC 11, fourth chip IC12, fifth chip IC13, the 6th
Chip IC 14, the 7th chip IC 15, the 8th chip IC 16 connect, when forming electric energy meter read-write EEPROM between electric energy meter and frock
Link；8th chip IC 16 connects and composes the operation for pressing key control electric energy meter power-on and power-off with relay HF1, button S1；Second
Single contact pin J6 connects and composes the communication of frock and computer host computer with computer；9th chip IC 17 uses is63wv1024bli
The external RAM chip of type；Test fixture is isolated with computer by the first optocoupler U2 and the second optocoupler U3, protection computer serial port safety.
Embodiment 2
As shown in Fig. 2 to Figure 14, EEPROM test fixtures provided in this embodiment, access electric energy meter and eeprom chip it
Between, for testing the security and correctness of electric energy meter storage.
In this example, the eeprom chip to be measured in electric energy meter is removed, is put into the eeprom chip seat of test fixture,
Connected by the eeprom chip pad of single contact pin J10 and electric energy meter with conducting wire.
As shown in figure 12：In this example, USB data line access computer.
As shown in Figure 6：In this example, close frock OR_BAT buttons or access external ac power source to frock L_IN with
N_IN ends are powered on to frock.
As shown in Fig. 7,8,9,10：In this example, led to by 7 auxiliary ARM chips and 1 main ARM chips with electric energy meter data
News, all data of 8 groups of chips are all pooled in master chip.
As shown in figure 11：In this example, master chip and external RAM, eeprom chip and computer host computer communicate, respectively
Result is stored in external RAM and is sent to computer host computer.Then test EEPROM can be controlled by computer host computer.
As shown in figure 14：In this example, when electric energy meter read-write EEPROM, the LCD of corresponding frock RAM chip etc. will
Flicker.
Computer host computer is as shown in Figure 2：In this example, computer host computer is opened, main interface occurs.
Computer host computer is as shown in Figure 3：In this example, first, the USB port of test fixture is connected into computer host computer,
Computer host computer correctly selects and opens communication serial ports, then selects eeprom chip size.Traversal button is clicked on, is read whole
Data in eeprom chip.
Computer host computer is as shown in Figure 4：In this example, electric energy meter can power on, and at this moment computer host computer just can monitor
When electric energy meter powers on, concrete operations of the electric energy meter to eeprom chip, all data all will column on the right side of the machine of position on computers
In show.And will be highlighted by the EEPROM positions that electric energy meter was read and write with background color, checked easy to user.
Click on and reset color, background colour will all be cancelled.There is provided ' single ' column EEPROM that facilitates consultation is specific for right side column
Address date changes and ' part ' column is read for the ease of screening such as table, the data for the specified types such as table is write.In order to test electric energy
Table preserves the performance and security of EEPROM data, can be taking human as being write or read in eeprom chip by computer host computer
Data, and this operation is also the test mode that test electric energy meter EEPROM preserves project.Finally, protected by clicking on computer host computer
Deposit data button, it is possible to the Excel of catalogue where all data that computer host computer is read are stored in computer host computer
In, facilitate subsequent analysis inspection.
Computer host computer is as shown in Figure 4：In this example, right-hand column purpose title is double-clicked, the column on display right side can be amplified
Mesh, the column of amplification and original column are real-time synchronizations.
The above is only that the preferred embodiment of the utility model is described, and is not the model to the utility model
Enclose and be defined, on the premise of the spirit of the design of the utility model is not departed from, this area ordinary skill technical staff is to this practicality
The various modifications and improvement that new technical solution is made, should all fall into the protection model that claims of the utility model determine
In enclosing.
Claims (12)
1. a kind of EEPROM test fixtures, are accessed between electric energy meter and eeprom chip, for testing the safety of electric energy meter storage
Property and correctness, it is characterised in that：The test fixture include being used for showing the computer host computer of test data, the test fixture with
Computer host computer communication serial communication module, for receiving 7 piece ARM auxiliary core pieces of the electric energy meter to eeprom chip operation data
The power circuit of power supply is provided with 1 piece of ARM master chip, to the test fixture, for the external RAM of storage operation number evidence and placement
The eeprom chip seat of eeprom chip；7 pieces of ARM auxiliary cores pieces and 1 piece of ARM master chip connects RX in a series arrangement and TX draws
Foot simultaneously connects computer host computer by serial communication module, and the I/O port of 1 piece of ARM master chip is connected with external RAM.
2. EEPROM test fixtures as claimed in claim 1, it is characterised in that：The test test fixture is additionally provided with multigroup
Single contact pin.
3. EEPROM test fixtures as claimed in claim 2, it is characterised in that：The single contact pin of the test fixture includes first
Single contact pin J10, the second single contact pin J6.
4. EEPROM test fixtures as claimed in claim 1, it is characterised in that：The test fixture be additionally provided with relay HF1,
Button S1, communication chip IC7, the first optocoupler U2 and the second optocoupler U3.
5. EEPROM test fixtures as claimed in claim 1, it is characterised in that：EEPROM on the wiring board of the electric energy meter
The copper sheet of chip position is connected with the first single contact pin J10 of the test fixture respectively, USB line and the electricity of the test fixture
The serial communication module of brain host computer is connected, and eeprom chip is put into the eeprom chip seat of the test fixture, passes through computer
Host computer shows electric energy meter to eeprom chip operation monitoring.
6. EEPROM test fixtures as claimed in claim 1, it is characterised in that：The external RAM include the 8th chip IC 16,
9th chip IC 17, the tenth chip IC 18, the 8th chip IC 16 respectively with the 9th chip IC 17, the tenth chip IC 18 and place
The eeprom chip seat of eeprom chip connects and composes the external RAM that data when being tested for EEPROM are saved into eeprom chip
Circuit.
7. EEPROM test fixtures as claimed in claim 1, it is characterised in that：7 pieces of ARM auxiliary cores piece includes the second chip
IC8, fourth chip IC12, the 6th chip IC 14, the 6th chip IC 14, the first chip IC 5, the 3rd chip IC 11, fifth chip
IC13, the 8th chip IC 16 is connected with the second chip IC 8, the second chip IC 8 is connected with fourth chip IC12, fourth chip IC12
It is connected with the 6th chip IC 14, the 6th chip IC 14 is connected with the first chip IC 5, the first chip IC 5 connects with the 3rd chip IC 11
Connect, the 3rd chip IC 11 is connected with fifth chip IC13, fifth chip IC13 is connected with the 7th chip IC 15 and together constitutes electricity
7 piece ARM auxiliary chip circuits of the energy table to EEPROM read-write data transfer operations.
8. EEPROM test fixtures as claimed in claim 2, it is characterised in that：First single contact pin J10 of the test fixture
Respectively with the first chip IC 5, the second chip IC 8, the 3rd chip IC 11, fourth chip IC12, fifth chip IC13, the 6th chip
IC14, the 7th chip IC 15, the 8th chip IC 16 connect and compose 1 piece of ARM master chip, which constitutes electric energy meter reading
The link between electric energy meter and test fixture when writing EEPROM.
9. EEPROM test fixtures as claimed in claim 6, it is characterised in that：8th chip IC 16 and relay HF1,
Button S1 connects and composes key-press module, controls the operation of electric energy meter power-on and power-off.
10. EEPROM test fixtures as claimed in claim 3, it is characterised in that：On the second single contact pin J6 and computer
Position machine connects and composes the communication of the test fixture and computer host computer.
11. EEPROM test fixtures as claimed in claim 6, it is characterised in that：9th chip IC 17 uses
The external RAM chip of is63wv1024bli types.
12. EEPROM test fixtures as claimed in claim 4, it is characterised in that：The test fixture passes through with computer host computer
First optocoupler U2 and the second optocoupler U3 isolation, protection computer host computer serial ports safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343031.2U CN207367607U (en) | 2017-10-18 | 2017-10-18 | A kind of EEPROM test fixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721343031.2U CN207367607U (en) | 2017-10-18 | 2017-10-18 | A kind of EEPROM test fixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207367607U true CN207367607U (en) | 2018-05-15 |
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ID=62420447
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| CN201721343031.2U Active CN207367607U (en) | 2017-10-18 | 2017-10-18 | A kind of EEPROM test fixtures |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710981A (en) * | 2020-12-31 | 2021-04-27 | 华立科技股份有限公司 | Pulse test and ammeter power-on and power-off reliability test system and method |
-
2017
- 2017-10-18 CN CN201721343031.2U patent/CN207367607U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710981A (en) * | 2020-12-31 | 2021-04-27 | 华立科技股份有限公司 | Pulse test and ammeter power-on and power-off reliability test system and method |
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