CN101752834A - UUT power supply management method and ID identification circuit thereof - Google Patents
UUT power supply management method and ID identification circuit thereof Download PDFInfo
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- CN101752834A CN101752834A CN200910254548A CN200910254548A CN101752834A CN 101752834 A CN101752834 A CN 101752834A CN 200910254548 A CN200910254548 A CN 200910254548A CN 200910254548 A CN200910254548 A CN 200910254548A CN 101752834 A CN101752834 A CN 101752834A
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Abstract
The invention relates to a UUT power supply management method and an ID identification circuit thereof. The UUT power supply management method comprises the following steps: 1) the ID number of a module UUT to be tested is read and whether the ID number is correct is judged, and a static test is conducted to the module UUT to be tested if the ID number is correct; and the power supply of an adapter is cut off and fault handling is conducted if the ID number is incorrect; 2) if the static test indicates that the condition of the module UUT is normal, power is supplied to the module UUT to be tested and an ATE automatically tests the UUT; and if the static test indicates that the condition of the module UUT is abnormal, fault handling is conducted; and 3) the electrical characteristics and the ID number of the module UUT to be tested are monitored during the automatic testing, the monitoring to the electrical characteristics and the ID number of the module UUT to be tested is ended if the electrical characteristics and the ID number of the module UUT to be tested are incorrect, the power is cut off and the testing result is output. The invention has the advantages that the impacts on the UUT caused by faults such as power supply errors or UUT circuit abnormality itself are avoided, the security of the UUT is improved and the ATE is protected.
Description
Technical field
The present invention relates to a kind of automatic test equipment (ATE that is used for; Automatic Test Equipment) in the course of work to the power supply management method of the protection of tested module (UUT, Unit Under Test) and automatic test equipment ATE and realize the ID identification circuit of this method.
Background technology
At present, Auto-Test System is not protected UUT in the course of the work or only is to do some simple overcurrents, overvoltage protection design on circuit.Because in design during Auto-Test System, be design focal point to the automatic Test Strategy of UUT, and the protection of UUT is not caused enough attention usually.
When UUT tests automatically, be prone to and cause power supply to insert the problem of the power supply mistake that bus etc. causes the module wrong plug.Owing to enough considerations are not made in the error that the operator is prone in design during ATE, it is thorough inadequately simultaneously adapter design to be considered, thereby to cause the protection to UUT and ATE be poor efficiency and unilateral.
Summary of the invention
The purpose of this invention is to provide a kind of UUT of preventing electrical characteristics and damaged ATE and UUT unusually; emphasis prevents to power mistake (the wrong plug module causes) and UUT self circuit abnormality (welding mistake or chip damage and cause) to the damage of UUT and ATE, thereby reaches the UUT power supply management method and the ID identification circuit thereof of the purpose of protection UUT and ATE.
Technical solution of the present invention is: a kind of UUT power supply management method, and its implementation is:
(1) reads and judge whether ID number of tested module UUT be correct,, then tested module UUT is carried out static test if this ID is correct; If this ID is incorrect, then cut off adaptor power supplies, carry out troubleshooting;
(2) if static test is normal, then begin power supply to tested module UUT, ATE begins UUT is tested automatically; If static test is unusual, then cuts off adaptor power supplies and carry out troubleshooting;
(3) when ATE tests automatically to UUT, the electrical characteristics of monitoring tested module UUT and ID number, if the electrical characteristics of tested module UUT or ID number are incorrect, then finish the electrical characteristics of tested module UUT and ID number monitoring, tested module UUT and adapter outage, and finish test automatically test result is exported to the test report hypervisor; If the electrical characteristics of tested module UUT and ID number are normal, then circulatory monitoring electrical characteristics and ID number until automatic EOT.
The described static test of above-mentioned steps (1) is realized by relay switching circuit.
The COM+ end of above-mentioned relay switching circuit is connected with the HI end of program control universal instrument, and the COM-end is connected with the LO end of program control universal instrument; The tested point that the CH end is connected with adapter on the UUT interface connects.The COM+ of relay switching circuit is connected with the CH end with a plurality of dpdt relay switches by a single-pole double throw relay switch with the COM-end; Relay switch is by program control, and the same time has only that a COM+ end is connected with the CH+ end, COM-holds to hold with CH-and is connected.
The specific implementation process of above-mentioned steps (3) is:
(3.1) each tested module UUT sets in advance rational electrical characteristics protection range;
(3.2) electrical characteristics of monitoring tested module UUT under powering state;
(3.3) whether the value of judging these electrical characteristics in the electrical characteristics protection range, if ID number of, then reading tested module UUT of the value of these electrical characteristics at the electrical characteristics protection range, if this ID number is correct, circulatory monitoring electrical characteristics and ID number up to UUT automatically test be all over; If ID number is incorrect, then interrupt current test process and finish test automatically, change exception handles over to; If the value of these electrical characteristics exceeds the electrical characteristics protection range of setting, then cut off each power supply among the test macro ATE, interrupt current test process end test automatically, change exception handles over to, and fault message is preserved into form.
The described electrical characteristics of above-mentioned steps (3) comprise voltage and current, mainly are to set its scope and size according to the actual needs of UUT.
A kind of ID identification circuit of realizing above-mentioned power supply management method, it is characterized in that: the ID identification circuit comprises one or more resistance; Described resistance is connected in test macro and exports between the power supply Vsys and tested module ground signalling of adapter.The number of described resistance is corresponding with the number of tested module UUT, and resistance is one when a kind of when UUT has only, and described resistance is to be series at ATE to export between the power supply Vsys and tested module UUT ground signalling of adapter; When resistance UUT has when multiple is a plurality of, and described resistance is to be parallel to ATE to export between the power supply Vsys and tested module UUT ground signalling of adapter.
A kind of UUT power supply management method involved in the present invention and ID identification circuit thereof can prevent because of the wrong plug module causes power supply mistake and UUT self circuit abnormality or other electrical characteristics unusually to the influence of tested module UUT, thereby can protect UUT and ATE to avoid damage.
Description of drawings
Fig. 1: power supply management method flow chart;
Fig. 2: voltage, current monitoring flow chart;
Fig. 3: static test connection layout;
Fig. 4: ID identification circuit schematic diagram.
Embodiment
The power supply management method of a kind of UUT involved in the present invention is seen Fig. 1, and its implementation is: (1) ATE is only to the adapter power supply, reads and judges that whether ID number of tested module UUT be correct, if this ID is correct, then carries out static test to tested module UUT; If this ID is incorrect, then cut off adaptor power supplies, carry out troubleshooting; (2) if static test is normal, then ATE gives tested module UUT power supply by adapter, and ATE begins UUT is tested automatically; If static test is unusual, then cuts off adaptor power supplies and carry out troubleshooting; (3) in the automatic testing process, when ATE tested automatically to UUT, the electrical characteristics of monitoring tested module UUT and ID number were if the electrical characteristics of tested module UUT or ID number are incorrect, then cut off the power supply of adapter and UUT, and test result is exported to the test report hypervisor.Power supply management method is to realize system-level power supply management strategy.
Above-mentioned static test is realized by relay switching circuit, sees Fig. 3, and the COM+ end of relay switching circuit is connected with the HI end of program control universal instrument, and the COM-end is connected with the LO end of program control universal instrument; The tested point that the CH end is connected with adapter on the UUT interface connects.The COM end of relay switching circuit is connected with the CH end with a plurality of dpdt relay switches by a single-pole double throw relay switch.Relay switch is by program control, and the same time has only that a COM+ end is connected with the CH+ end, COM-holds to hold with CH-and is connected.Static test mainly is to be used for over the ground resistance of power supply in the measurement module, bus signals to power supply and the resistance on ground, the resistance between adjacent bus signals.
Static test is an important step of module testing, and it can find the subproblem that exist in the production process early stage, and as the short circuit between holding wire/open circuit, part of devices lost efficacy and device loading error etc.Static test can find early that there are the situation of short circuit in power supply and ground, avoids the fault part to power up the back unnecessary loss.Concrete Test Strategy is realized by software arrangements.Table 1 is static test item and the acceptability limit that is provided with at certain UUT.
| Test event | Standard resistance range | Remarks |
| ??+5V-DGND | ??＞50Ω | |
| ??+15V-AGND | ??＞500Ω | |
| ??-15V-AGND | ??＞500Ω | |
| On draw bus signals-+5V | ??＞9000Ω | |
| Drop-down bus signals-DGND | ??＜10Ω |
Table 1 UUT static test scope table
Above-mentioned steps (3), see Fig. 2, operating voltage, electric current and the ID specific implementation process of monitoring tested module UUT are: the zone of reasonableness that it is voltage and current that (3.1) each tested module UUT sets in advance rational electrical characteristics protection range mainly is that the UUT according to different model is provided with its corresponding zone of reasonableness; (3.2) electrical characteristics of monitoring tested module UUT under powering state; (3.3) judge that the value of these electrical characteristics is whether in the electrical characteristics protection range, if the value of these electrical characteristics is in the electrical characteristics protection range,,, judge then whether automatic testing process finishes if this ID number correct then read tested module UUT ID number, if test does not finish automatically, then circulatory monitoring electrical characteristics and ID number, up to whole EOTs automatically, if automatic EOT to UUT, then finish monitoring electrical characteristics and ID number, cut off among the ATE each power supply and output test result; If ID number incorrect, then cut off each power supply among the ATE, interrupt current test process and finish test automatically, change exception handles over to, fault message is preserved into form and output test result; If the value of these electrical characteristics exceeds the electrical characteristics protection range of setting, then cut off each power supply among the ATE, interrupt current test process and finish test automatically, change exception handles over to, fault message is preserved into form and output test result.
Voltage, current monitoring mainly are to be implemented in the main electrical characteristics of monitoring in real time in the test process under the UUT powering state, it guarantees that UUT works under the normal voltage and current, exist under the situation of catastrophe failure at UUT avoiding, power up the damage that UUT and test macro are caused for a long time.
Above-mentioned electrical characteristics comprise voltage and current, and its scope and size mainly are to set according to the actual demand of different tested module UUT.
A kind of ID identification circuit of realizing above-mentioned power supply management method comprises at least one resistance; Described resistance is connected in test macro and exports between the power supply Vsys and tested module ground signalling of adapter.The number of described resistance is corresponding with the number of tested module UUT, and resistance is one when a kind of when UUT has only, and described resistance is to be series at ATE to export between the power supply Vsys and tested module UUT ground signalling of adapter; When resistance UUT has when multiple is a plurality of, and described resistance is to be parallel to ATE to export between the power supply Vsys and tested module UUT ground signalling of adapter.When test, UUT is with after ATE correctly is connected, with pairing that resistance of current tested module be ground connection.
Usually, if UUT wrong plug groove position on adapter will cause UUT and adapter power supply circuits not to match, might cause damage to UUT and ATE.See Fig. 2, discrete amount identification signal on adapter and UUT, promptly ID number.ID number corresponding one by one with every kind of UUT.Be respectively 110,101,011 discrete magnitude ID number as tested module UUTa, b, c.(tested module is a) by can linking to each other (in like manner ID1, ID2 with also link to each other with a ground pin on tested module b, the c respectively after ATE correctly is connected) with a ground pin on the tested module a after adapter and the correct physical connection of ATE at UUT for ID0, like this when module a correctly inserts, it is 110 that test macro can be read ID number by digital I, but the discrete magnitude identification signal of generation module a correspondence thus.Automatically before the test beginning, system is only to the adapter power supply, and to the UUT power supply, above-mentioned discrete magnitude identifying information is not at first judged by system, and when the discrete magnitude identifying information reads when wrong, test macro can change exception handles over to and cut off the electricity supply; Have only when the discrete magnitude identifying information is correct, test macro just can power up automatically to UUT and test.Testing software is designed in whole automatic testing process monitoring discrete magnitude identifying information, in case the discrete magnitude identifying information reads when wrong, cuts off among the ATE each power supply immediately and interrupts other process, changes exception handles over to.By the ID identification circuit, make UUT only when correctly being connected, just can be in electriferous state, thereby UUT is played a protective role with ATE.
A kind of UUT power supply management method and ID identification circuit thereof involved in the present invention; it is the protection that software and hardware combining realizes; realized system-level power supply management strategy by power supply management method; by being set, UUT module I D identification circuit realized automatic anti-error installation; thereby prevented to make influence to UUT owing to the wrong plug module causes power supply mistake or other faults; improve the fail safe of UUT in automatic testing process greatly, simultaneously ATE has been played protective effect.
Claims (7)
1. UUT power supply management method, it is characterized in that: its implementation may further comprise the steps:
1) reads and judge whether ID number of tested module UUT be correct,, then tested module UUT is carried out static test if this ID is correct; If this ID is incorrect, then cut off adaptor power supplies, carry out troubleshooting;
2) if static test is normal, then begin power supply to tested module UUT, ATE begins UUT is tested automatically; If static test is unusual, then cuts off adaptor power supplies and carry out troubleshooting;
3) in the automatic testing process, when ATE tests automatically to tested module UUT, the electrical characteristics of monitoring tested module UUT and ID number, if the electrical characteristics of tested module UUT or ID number are incorrect, then finish the electrical characteristics of tested module UUT and ID number monitoring, tested module UUT and adapter outage, and finish test automatically test result is exported to the test report hypervisor; If the electrical characteristics of tested module UUT and ID number are normal, then circulatory monitoring electrical characteristics and ID number until automatic EOT.
2. power supply management method according to claim 1 is characterized in that: the described static test of step 1) is realized by relay switching circuit; The COM+ end of described relay switching circuit is connected with the HI end of program control universal instrument, and the COM-end is connected with the LO end of program control universal instrument, and the tested point that the CH end is connected with adapter on the UUT interface connects; The COM+ of described relay switching circuit is to be connected with its CH end with a plurality of dpdt relay switches by a single-pole double throw relay switch with the COM-end.
3. according to claim 1 or 2 described power supply management methods, it is characterized in that: the specific implementation process of described step 3) is:
3.1) each tested module UUT sets in advance rational electrical characteristics protection range;
3.2) electrical characteristics of monitoring tested module UUT under powering state;
3.3) whether the value of judging these electrical characteristics in the electrical characteristics protection range, if ID number of at the electrical characteristics protection range, then reading tested module UUT of the value of these electrical characteristics, if this ID number is correct, circulatory monitoring electrical characteristics and ID number up to automatic EOT; If ID number is incorrect, then cut off each power supply in the test macro, interrupt current test process end test automatically, change exception handles over to; If the value of these electrical characteristics exceeds the electrical characteristics protection range of setting, then cut off each power supply in the test macro, interrupt current test process and finish test automatically, change exception handles over to.
4. according to the described power supply management method of claim 3, it is characterized in that: the described electrical characteristics of step 3) comprise voltage and current.
5. an ID identification circuit of realizing the described power supply management method of claim 1 is characterized in that: comprise one or more resistance; Described resistance is connected in test macro and exports between the power supply Vsys and tested module ground signalling of adapter.
6. ID identification circuit according to claim 5 is characterized in that: described resistance is one; This resistance string is coupled between the power supply Vsys and tested module ground signalling that test macro exports adapter to.
7. ID identification circuit according to claim 5 is characterized in that: described resistance is a plurality of; This resistance is parallel to test macro and exports between the power supply Vsys and tested module ground signalling of adapter.
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Cited By (6)
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| CN102427327A (en) * | 2011-12-13 | 2012-04-25 | Tcl空调器(中山)有限公司 | Motor control circuit and control method thereof |
| CN104571072A (en) * | 2013-10-23 | 2015-04-29 | 上海航天设备制造总厂 | Automatic detection system for faults of main control assembly and management control assembly in launch control system |
| CN105717378A (en) * | 2014-12-01 | 2016-06-29 | 中国航空工业集团公司第六三一研究所 | ATE dynamic power consumption management method |
| CN107423173A (en) * | 2017-05-19 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of optimization method for lifting memory test link |
| CN111175639A (en) * | 2020-01-13 | 2020-05-19 | 上海华岭集成电路技术股份有限公司 | Method for providing multi-level voltage by ATE |
| CN111983422A (en) * | 2020-07-14 | 2020-11-24 | 芜湖天航装备技术有限公司 | Automatic identification adapter for ATE automatic test system and identification method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427327A (en) * | 2011-12-13 | 2012-04-25 | Tcl空调器(中山)有限公司 | Motor control circuit and control method thereof |
| CN102427327B (en) * | 2011-12-13 | 2014-08-27 | Tcl空调器(中山)有限公司 | Motor control circuit and control method thereof |
| CN104571072A (en) * | 2013-10-23 | 2015-04-29 | 上海航天设备制造总厂 | Automatic detection system for faults of main control assembly and management control assembly in launch control system |
| CN105717378A (en) * | 2014-12-01 | 2016-06-29 | 中国航空工业集团公司第六三一研究所 | ATE dynamic power consumption management method |
| CN105717378B (en) * | 2014-12-01 | 2018-09-21 | 中国航空工业集团公司第六三一研究所 | A kind of ATE dynamic power managements method |
| CN107423173A (en) * | 2017-05-19 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of optimization method for lifting memory test link |
| CN111175639A (en) * | 2020-01-13 | 2020-05-19 | 上海华岭集成电路技术股份有限公司 | Method for providing multi-level voltage by ATE |
| CN111983422A (en) * | 2020-07-14 | 2020-11-24 | 芜湖天航装备技术有限公司 | Automatic identification adapter for ATE automatic test system and identification method thereof |
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| CN101752834B (en) | 2013-06-19 |
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