CN101752834B - 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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- CN101752834B CN101752834B CN 200910254548 CN200910254548A CN101752834B CN 101752834 B CN101752834 B CN 101752834B CN 200910254548 CN200910254548 CN 200910254548 CN 200910254548 A CN200910254548 A CN 200910254548A CN 101752834 B CN101752834 B CN 101752834B
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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 for automatic test equipment (ATE; 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 the method.
Background technology
At present, Auto-Test System is not protected UUT in the course of the work or is only 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 the problem that the module wrong plug is caused the power supply mistake that power supply access bus etc. causes.Owing to enough considerations not being made in the error that the operator is prone in design during ATE, it is thorough not simultaneously adapter design to be considered, thereby to cause the protection to UUT and ATE be poor efficiency and unilateral.
Summary of the invention
A kind of UUT of preventing electrical characteristics Abnormal damage ATE and UUT have been the purpose of this invention is to provide; emphasis prevents from powering 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 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) read and judge that whether No. ID of tested module UUT be correct, if this ID is correct, carries out static test to tested module UUT; If this ID is incorrect, cut off adaptor power supplies, carry out troubleshooting;
(2) if static test is normal, begin the power supply to tested module UUT, ATE begins UUT is tested automatically; If static test is abnormal, cuts off adaptor power supplies and carry out troubleshooting;
(3) at ATE, UUT is carried out automatically test in, the electrical characteristics of monitoring tested module UUT and No. ID, if the electrical characteristics of tested module UUT or No. ID incorrect, finish the electrical characteristics of tested module UUT and the monitoring of No. ID, 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 No. ID are normal, circulatory monitoring electrical characteristics and No. ID until automatically test finish.
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 be connected with COM-by single-pole double throw relay switch with are connected the dpdt relay switch and hold with CH and be connected; Relay switch is by program control, only has that a COM+ end is connected with the CH+ end, a COM-holds to hold with CH-and is connected the same time.
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) judge that the value of these electrical characteristics is whether in the electrical characteristics protection range, if the value of these electrical characteristics is at the electrical characteristics protection range, read tested module UUT No. ID, if this No. ID correct, circulatory monitoring electrical characteristics and No. ID until UUT automatically test all finish; If No. ID is incorrect, 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, cut off each power supply in 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, are mainly 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 between the power supply Vsys and tested module ground signalling that test macro exports adapter to.The number of described resistance is corresponding with the number of tested module UUT, and resistance is one when a kind of when UUT only has, and described resistance is to be series between the power supply Vsys and tested module UUT ground signalling that ATE exports adapter to; Be a plurality of when resistance UUT has when multiple, described resistance is to be parallel between the power supply Vsys and tested module UUT ground signalling that ATE exports adapter to.
A kind of UUT power supply management method involved in the present invention and ID identification circuit thereof can prevent because the wrong plug module causes power supply mistake and UUT self circuit abnormality or other electrical characteristics extremely on the impact 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 No. ID of tested module UUT be correct, if this ID is correct, carries out static test to tested module UUT; If this ID is incorrect, cut off adaptor power supplies, carry out troubleshooting; (2) if static test is normal, to tested module UUT power supply, ATE begins UUT is tested automatically ATE by adapter; If static test is abnormal, cuts off adaptor power supplies and carry out troubleshooting; (3) in automatic testing process, when at ATE, UUT being carried out automatically test, the electrical characteristics of monitoring tested module UUT and No. ID, if the electrical characteristics of tested module UUT or No. ID incorrect, 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 of relay switching circuit end by a single-pole double throw relay switch with are connected the dpdt relay switch and hold with CH and be connected.Relay switch is by program control, only has that a COM+ end is connected with the CH+ end, a COM-holds to hold with CH-and is connected the same time.Static test be mainly in measurement module over the ground resistance of power supply, bus signals to the resistance of VDD-to-VSS, the resistance between adjacent bus signals.
Static test is an important step of module testing, and it can find the subproblem that exist in 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 is the situation of short circuit in VDD-to-VSS, avoids the fault part to power up rear unnecessary loss.Concrete Test Strategy is by the software Configuration.Table 1 is static test item and the acceptability limit that arranges for 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 is mainly that the UUT according to different model arranges 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,, if this No. ID correct, judge whether automatic testing process finishes read tested module UUT No. ID, if test does not finish automatically, circulatory monitoring electrical characteristics and No. ID, until whole tests automatically of UUT are finished, if test finishes automatically, finish monitoring electrical characteristics and No. ID, cut off in ATE each power supply and output test result; If No. ID is incorrect, cut off each power supply in ATE, interrupt current test process and finish test automatically, change exception handles over to, fault message is preserved into form and outputed test result; If the value of these electrical characteristics exceeds the electrical characteristics protection range of setting, cut off each power supply in ATE, interrupt current test process end test automatically, change exception handles over to, fault message is preserved into form and outputed test result.
Voltage, current monitoring are mainly to realize the main electrical characteristics under Real-Time Monitoring UUT powering state in test process, it guarantees that UUT works under normal voltage and current, in the situation that there is catastrophe failure in UUT, power up for a long time the damage that UUT and test macro are caused to avoid.
Above-mentioned electrical characteristics comprise voltage and current, and its scope and size are mainly 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 between the power supply Vsys and tested module ground signalling that test macro exports adapter to.The number of described resistance is corresponding with the number of tested module UUT, and resistance is one when a kind of when UUT only has, and described resistance is to be series between the power supply Vsys and tested module UUT ground signalling that ATE exports adapter to; Be a plurality of when resistance UUT has when multiple, described resistance is to be parallel between the power supply Vsys and tested module UUT ground signalling that ATE exports adapter to.When test, after UUT and ATE exact connect ion, with corresponding 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 mate, might cause damage to UUT and ATE.See Fig. 2, discrete amount identification signal on adapter and UUT, namely No. ID.No. ID corresponding one by one with every kind of UUT.Discrete magnitude as tested module UUTa, b, c is respectively 110,101,011 No. ID.ID0 UUT (tested module a) by can be connected with a ground pin on tested module a after adapter and the correct physical connection of ATE (in like manner ID1, ID2 with the ATE exact connect ion after also be connected with a ground pin on tested module b, c respectively), like this when module a correctly inserts, it is 110 that test macro can be read No. ID by digital I/O, but the discrete magnitude identification signal that generation module a is corresponding thus.Automatically before the test beginning, system is only to the adapter power supply, and to the UUT power supply, at first system does not judge above-mentioned discrete magnitude identifying information, and when the discrete magnitude identifying information reads when wrong, test macro can change exception handles over to and cut off the electricity supply; Only have 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 immediately in ATE each power supply and interrupts other process, changes exception handles over to.By the ID identification circuit, make UUT only just can be in electriferous state with the ATE exact connect ion time, thereby UUT is played a protective role.
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 the automatic defect preventing installation; thereby prevented from making the impact on UUT because the wrong plug module causes power supply mistake or other faults; greatly improve the fail safe of UUT in automatic testing process, simultaneously ATE has been played protective effect.
Claims (3)
1. UUT power supply management method, it is characterized in that: its implementation comprises the following steps:
1) read and judge that whether No. ID of tested module UUT be correct, if this ID is correct, carries out static test to tested module UUT; If this ID is incorrect, cut off adaptor power supplies, carry out troubleshooting;
2) if static test is normal, begin the power supply to tested module UUT, ATE begins UUT is tested automatically; If static test is abnormal, cuts off adaptor power supplies and carry out troubleshooting;
2.1) each tested module UUT sets in advance rational electrical characteristics protection range;
2.2) electrical characteristics of monitoring tested module UUT under powering state;
2.3) value that judges these electrical characteristics whether in the electrical characteristics protection range, if the value of these electrical characteristics at the electrical characteristics protection range, reads No. ID of tested module UUT, if this No. ID correct, circulatory monitoring electrical characteristics and No. ID until automatically test finish; If No. ID is incorrect, cut off each power supply in 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, cut off each power supply in test macro, interrupt current test process and finish test automatically, change exception handles over to.
2. power supply management method according to claim 1, it 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 be connected with COM-be by a single-pole double throw relay switch with are connected the dpdt relay switch and are connected with its CH end.
3. power supply management method according to claim 2, is characterized in that: step 2) described electrical characteristics comprise voltage and current.
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| 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 |
| CN104571072B (en) * | 2013-10-23 | 2019-01-25 | 上海航天设备制造总厂 | Master control combination and control combined fault automatic checkout system is held in a kind of launching control system |
| 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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| CN1508983A (en) * | 2002-12-19 | 2004-06-30 | 华为技术有限公司 | Inter face for realizing automatic impedance matching and method thereof |
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| CN1508983A (en) * | 2002-12-19 | 2004-06-30 | 华为技术有限公司 | Inter face for realizing automatic impedance matching and method thereof |
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