WO2009150819A1 - 試験モジュール、試験装置および試験方法 - Google Patents
試験モジュール、試験装置および試験方法 Download PDFInfo
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/317—Testing of digital circuits
- G01R31/31725—Timing aspects, e.g. clock distribution, skew, propagation delay
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- the present invention relates to a test module, a test apparatus, and a test method.
- the present invention relates to a test module, a test apparatus, and a test method for performing phase correction on an input signal of an output signal output from an output terminal of a device under test.
- This application is related to the following Japanese application. For designated countries where incorporation by reference of documents is permitted, the contents described in the following application are incorporated into this application by reference and made a part of this application.
- the test apparatus performs a test of a device under test (DUT: Device Under Test) to be tested based on a test program.
- the test program is to compare the instruction to be executed by the test equipment with the test pattern output to each terminal of the device under test or the output pattern output from each terminal of the device under test. Including.
- the number of cycles from the input of the test pattern to the output of the output pattern corresponding to the test pattern may not be specified or may be indefinite.
- the test apparatus detects that the device under test has output a predetermined header pattern, and outputs it after a specific cycle from the header pattern. It is desirable to provide a function (hunt function) for comparing the output pattern to be compared with the expected value pattern.
- Patent Document 1 discloses a test apparatus and a test method for comparing the output of an output pattern sequence in synchronization with reading of an expected value pattern sequence.
- the test apparatus includes a header pattern detection unit that detects whether or not the header pattern sequence is output from the device under test when a detection start instruction that instructs the detection start of the header pattern sequence is executed, and a header pattern A timing adjustment unit that causes the expected value pattern and the output pattern to be synchronized and input to the expected value comparison unit in the same cycle when a column is detected; JP 2006-10651 A
- a header pattern is given to the DUT, an output pattern from the DUT is accumulated, and a specific pattern corresponding to the header pattern is detected.
- the accumulated amount of the output pattern from the DUT is required to be at least the length of the header pattern, and it is required to take into account a hunt delay that sufficiently exceeds the required phase shift amount.
- a test pattern generation unit that generates a test pattern given to a device under test, and a device under test when the test pattern is given to the device under test
- An expected value pattern generation unit that generates an expected value pattern expected as a response indicated by the, and a pattern comparison unit that compares an output pattern output from the device under test when the test pattern is given to the device under test with an expected value pattern
- a specific pattern detection unit that detects a specific pattern output as a response to the specific test pattern from the output pattern, and detects the timing at which the specific pattern is detected The timing detector and the output pattern based on the timing detected by the timing detector.
- a phase adjusting unit that adjusts to fit the down phase to the phase of the expected pattern, the test modules with are provided.
- a specific pattern detection unit that detects a specific pattern output as a response of a specific test pattern from a device under test that outputs an output pattern that responds to a given test pattern, and detects a timing at which the specific pattern is detected Based on the timing detected by the timing detection unit and the timing detection unit, a phase adjustment unit that adjusts the phase of the output pattern to match the phase of the expected value pattern expected as a response of the device under test with respect to the test pattern;
- the specific pattern detection unit includes an input data storage unit that sequentially stores output pattern data as input data, a match detection unit that detects a match between the input data stored in the input data storage unit and the specific pattern, and a match detection unit And a result storage unit for sequentially storing the detection results.
- the input data storage unit can store the input data for each detection cycle
- the match detection unit can detect the match between the input data and the specific pattern for each detection cycle
- the result storage unit sequentially detects the detection results for each detection cycle. Can be stored.
- the timing detection unit can detect the timing at which the specific pattern is detected from the bit position of the result storage unit indicating that the detection results match in the detection result for each detection cycle stored in the result storage unit.
- the input data storage unit may be a latch circuit having the number of stages corresponding to the length of the specific pattern
- the match detection unit may be a parallel number comparison circuit corresponding to the length of the specific pattern
- the result storage unit A pipeline circuit having the number of stages corresponding to the maximum delay of the specific pattern may be used.
- a test pattern generation unit that generates a test pattern given to the device under test, and an expectation expected as a response of the device under test when the test pattern is given to the device under test
- An expected value pattern generation unit that generates a value pattern, a pattern comparison unit that compares an output pattern output from the device under test when the test pattern is given to the device under test, and an expected value pattern;
- a specific pattern detection unit that detects a specific pattern output as a response to the specific test pattern from the output pattern
- a timing detection unit that detects timing when the specific pattern is detected
- a timing detection unit Output pattern phase based on the timing detected by the expected value pattern
- a phase adjusting unit that adjusts to conform to the phase, the test apparatus equipped with is provided.
- test apparatus equipped with the above test module.
- a test pattern generation stage for generating a test pattern given to the device under test, and an expectation expected as a response of the device under test when the test pattern is given to the device under test
- An expected value pattern generation stage for generating a value pattern, a pattern comparison stage for comparing an output pattern output from the device under test when the test pattern is given to the device under test, and an expected value pattern;
- a specific pattern detection stage for detecting a specific pattern output as a response to the specific test pattern from the output pattern
- a timing detection stage for detecting a timing when the specific pattern is detected
- the phase of the output pattern is expected based on the timing detected by Test method comprising: a phase adjustment step, the adjust to match the value pattern phase is provided.
- the specific pattern detection stage detects the specific pattern output as the response of the specific test pattern from the device under test that outputs the output pattern that responds to the given test pattern, and detects the timing when the specific pattern is detected
- a phase adjustment stage that adjusts the phase of the output pattern to match the phase of the expected value pattern expected as a response of the device under test with respect to the test pattern based on the timing detected in the timing detection stage.
- the specific pattern detection stage includes an input data storage stage that sequentially stores output pattern data as input data, a coincidence detection stage that detects a match between the input data stored in the input data storage stage and the specific pattern, and a coincidence detection stage A result storage step of sequentially storing the detection results in the result storage unit.
- the input data storage stage stores the input data for each detection cycle
- the coincidence detection stage detects the match between the input data and the specific pattern for each detection cycle
- the result storage stage results in the detection result for each detection cycle. You may store sequentially in a storage part.
- the timing detection stage may detect the timing at which the specific pattern is detected from the bit position of the result storage unit indicating that the detection results match in the detection results for each detection cycle stored in the result storage stage.
- the structure of the test module 10 is shown.
- the configuration of the hunt compare unit 148 is shown.
- An example of the header pattern detection unit 210 is shown.
- the timing of the process by which an expected value pattern sequence and an output pattern sequence are compared is shown.
- test modules 100 DUT 102 Main memory 104 Instruction memory 106 Test pattern memory 108 Expected value pattern memory 110 Digital capture memory 112 Central pattern control unit 114 Pattern list memory 116 Vector generation control unit 120 Central capture control unit 122 Pattern result memory 130 Channel block 140 Channel pattern generation unit 142 Sequential Pattern Generation Unit 144 Format Control Unit 146 Sequential Pattern Generation Unit 148 Hunt Compare Unit 150 Fail Capture Control Unit 152 Fail Capture Memory 160 Timing Generation Unit 170 Driver 180 Comparator 200 Header Pattern Storage Unit 210 Header Pattern Detection Unit 220 Alignment Unit 230 Expected value comparison unit Timing adjustment unit 250 selector 260 an error notification unit 310 input data storage unit 320 match detector 330 result storage unit 340 result selecting section 350 selects the result storage unit
- FIG. 1 shows the configuration of the test module 10.
- the test module 10 is a test apparatus that tests the DUT 100 including one or a plurality of terminals, and includes a main memory 102, a central pattern control unit 112, and a plurality of channel blocks 130.
- the main memory 102 stores the test program of the DUT 100 and records an output pattern output from the DUT 100 as a result of executing the test program.
- the main memory 102 includes an instruction memory 104, a plurality of test pattern memories 106, a plurality of expected value pattern memories 108, and a digital capture memory 110.
- the instruction memory 104 stores each instruction included in the test program.
- Each of the plurality of test pattern memories 106 is provided corresponding to each terminal of the DUT 100, and stores a test pattern string used for each terminal in association with each instruction, during an instruction cycle period for executing the instruction.
- the test pattern sequence includes a plurality of test patterns to be sequentially output to the terminals of the DUT 100 during the instruction cycle.
- the test pattern memory 106 corresponds to each instruction and corresponds to a 32-bit signal output during one instruction cycle.
- a test pattern sequence including 32 test patterns to be stored is stored.
- Each of the plurality of expected value pattern memories 108 is provided corresponding to each terminal of the DUT 100, and stores an expected value pattern string used during an instruction cycle period for executing the instruction in association with each instruction.
- the expected value pattern sequence includes a plurality of expected value patterns to be sequentially compared with a plurality of output patterns sequentially output from the terminals of the DUT 100 during the instruction cycle.
- the digital capture memory 110 records an output pattern output from the DUT 100 as a result of executing the test program.
- the instruction memory 104, the plurality of test pattern memories 106, the plurality of expected value pattern memories 108, and / or the digital capture memory 110 may be provided by being divided into separate memory modules that constitute the main memory 102. These may be provided as different storage areas in the same memory module.
- the central pattern control unit 112 is connected to the main memory 102 and the plurality of channel blocks 130, and performs a process common to each terminal of the DUT 100.
- the central pattern control unit 112 includes a pattern list memory 114, a vector generation control unit 116, a central capture control unit 120, and a pattern result memory 122.
- the pattern list memory 114 stores the start / end address of the routine in the instruction memory 104, the start address of the test pattern in the test pattern memory 106, and the expected value pattern in the expected value pattern memory 108 for each of the main routine or each subroutine of the test program. Stores the start address, etc.
- the vector generation control unit 116 functions as a sequential control unit together with the sequential pattern generation unit 146, and sequentially executes instructions included in the test program of the DUT 100 for each instruction cycle. More specifically, the vector generation control unit 116 sequentially reads out each instruction from the start address to the end address from the pattern list memory 114 and executes them sequentially for each routine.
- the central capture control unit 120 receives the pass / fail judgment results for each terminal of the DUT 100 from each channel block 130 and totals the pass / fail judgment results of the DUT 100 for each routine.
- the pattern result memory 122 stores the quality determination result of the DUT 100 for each routine.
- Each of the plurality of channel blocks 130 is provided corresponding to each terminal of the DUT 100.
- Each channel block 130 includes a channel pattern generation unit 140, a timing generation unit 160, a driver 170, and a comparator 180.
- the channel pattern generation unit 140 generates a test pattern sequence or an expected value pattern sequence used for testing the terminal, and compares the output pattern sequence and the expected value pattern sequence of the DUT 100.
- the channel pattern generation unit 140 includes a sequential pattern generation unit 142, a format control unit 144, a sequential pattern generation unit 146, a hunt / compare unit 148, a fail capture control unit 150, and a fail capture memory 152.
- the sequential pattern generation unit 142 may function as a test pattern generation unit together with the vector generation control unit 116.
- the sequential pattern generation unit 142 generates a test pattern given to the DUT 100 that is a device under test.
- the sequential pattern generation unit 142 receives from the vector generation control unit 116 the start address of the test pattern sequence to be output corresponding to the routine to be executed. Then, the sequential pattern generation unit 142 reads the test pattern sequence from the test pattern memory 106 in order from the start address corresponding to each instruction cycle, and sequentially outputs it to the format control unit 144.
- the format control unit 144 converts the test pattern sequence into a format for controlling the driver 170.
- the sequential pattern generation unit 146 may function as an expected value pattern generation unit together with the vector generation control unit 116.
- the sequential pattern generator 146 generates an expected value pattern expected as a response indicated by the device under test when the test pattern is given to the device under test.
- the sequential pattern generation unit 146 receives the start address of the expected value pattern sequence from the vector generation control unit 116 corresponding to the routine to be executed. Then, the sequential pattern generation unit 146 reads the expected value pattern from the expected value pattern memory 108 in order from the start address corresponding to each instruction cycle, and sequentially outputs the expected value pattern to the hunt / compare unit 148 and the fail capture control unit 150.
- the hunt compare unit 148 compares the output pattern output from the DUT 100 with the expected value pattern when the test pattern is given to the DUT 100.
- the hunt compare unit 148 inputs the output pattern sequence output from the DUT 100 via the comparator 180 and compares it with the expected value pattern sequence.
- the hunt compare unit 148 starts the comparison with the expected value pattern string on the condition that a specific header pattern string is output from the DUT 100 for the output pattern string output from the DUT 100 at an indefinite timing. It may have a function.
- the hunt / compare unit 148 may start detection of the header pattern sequence on condition that a detection start instruction for starting detection of an output pattern sequence that matches the header pattern sequence is executed.
- the hunt function for example, the hunt compare unit 148 compares the output pattern sequence with the expected value pattern sequence based on the time required from the start of detection of the header pattern sequence to the detection of the header pattern sequence. Adjust timing.
- the fail capture control unit 150 receives information on match / mismatch between the output pattern sequence of the DUT 100 and the expected value pattern sequence from the hunt compare unit 148, and generates a pass / fail judgment result of the DUT 100 for the terminal.
- the fail capture memory 152 stores fail information including the result of the hunt processing by the hunt / compare unit 148 or the value of the output pattern that does not match the expected value.
- the timing generation unit 160 generates a timing at which the driver 170 outputs each test pattern in the test pattern sequence, and a timing at which the comparator 180 takes in the output pattern of the DUT 100.
- the driver 170 outputs each test pattern output from the format control unit 144 in the channel pattern generation unit 140 to the DUT 100 at the timing specified by the timing generation unit 160.
- the comparator 180 acquires the output pattern output from the terminal of the DUT 100 at the timing specified by the timing generation unit 160 and supplies the output pattern to the hunt / compare unit 148 and the digital capture memory 110 in the channel block 130.
- channel pattern generation unit 140 has a function of the sequential pattern generation unit 142 and the sequential pattern generation unit 146 instead of the configuration in which the sequential pattern generation unit 142 and the sequential pattern generation unit 146 described above are separately provided.
- a configuration including a sequential pattern generation unit may be employed.
- FIG. 2 shows the configuration of the hunt / compare unit 148.
- the hunt compare unit 148 includes a header pattern storage unit 200, a header pattern detection unit 210, an alignment unit 220, an expected value comparison unit 230, a timing adjustment unit 240, a selector 250, and an error notification unit 260. .
- the header pattern storage unit 200 stores a plurality of header pattern sequences.
- the header pattern detection unit 210 determines whether a detection start instruction for instructing the start of detection of an output pattern sequence that matches the header pattern sequence has been executed.
- the detection start instruction includes an instruction to select a header pattern string to be detected from the header pattern storage unit 200.
- the header pattern detection unit 210 may be an example of a specific pattern detection unit. When a specific test pattern is given to the DUT 100, the header pattern detection unit 210 detects a specific pattern output as a response to the specific test pattern from the output pattern. When a detection start command is executed, the header pattern detection unit 210 selects a header pattern string to be detected from the header pattern storage unit 200 based on the detection start command. Then, the header pattern detection unit 210 detects whether or not an output pattern sequence that matches the header pattern sequence is output from the DUT 100 for the header pattern sequence selected based on the detection start command. Specifically, the header pattern detection unit 210 detects an output pattern sequence that matches the header pattern sequence from the output signal of the comparator 180.
- the timing adjustment unit 240 may have a function of a timing detection unit that detects the timing at which the specific pattern is detected. When an output pattern sequence that matches the header pattern sequence is detected, the timing adjustment unit 240 outputs an output pattern based on the time elapsed from the start of detection of the header pattern sequence until the header pattern sequence is detected.
- a parameter for adjusting the output timing of the column is set in the alignment unit 220. For example, the timing adjustment unit 240 may set the phase shift amount for shifting the output pattern sequence in the alignment unit 220. By appropriately setting the amount of phase shift, the output pattern sequence and the expected value pattern sequence can be synchronized.
- the alignment unit 220 may be an example of a phase adjustment unit.
- the alignment unit 220 may adjust the phase of the output pattern to match the phase of the expected value pattern based on the timing detected by the timing detection unit.
- the alignment unit 220 inputs the output pattern sequence output from the DUT 100 from the comparator 180.
- the alignment unit 220 shifts the input output pattern sequence by the phase shift amount set by the timing adjustment unit 240 and sends it to the expected value comparison unit 230 and the selector 250.
- the alignment unit 220 may output the output pattern sequence as it is without shifting the phase when the header pattern sequence is not detected.
- the alignment unit 220 includes a plurality of cascaded flip-flops and a selector that selects and outputs one of the outputs of the plurality of flip-flops.
- the first stage flip-flop sequentially inputs the output pattern sequence.
- the selector selects and outputs the output of any flip-flop based on the phase shift amount set by the timing adjustment unit 240.
- the alignment part 220 can make variable the number of the flip-flops through which an output pattern passes, and can match the timing of an output pattern sequence and an expected value pattern sequence.
- the expected value comparison unit 230 compares the output pattern sequence input from the alignment unit 220 with the expected value pattern sequence input from the sequential pattern generation unit 146 when the header pattern sequence is detected, and sequentially compares the comparison results with the selector. Send to 250.
- the selector 250 inputs the comparison result by the expected value comparison unit 230 and sends it to the fail capture control unit 150.
- the selector 250 sends the output pattern sequence input from the alignment unit 220 to the fail capture control unit 150.
- the error notification unit 260 has failed to detect the header pattern sequence when the output pattern sequence that matches the header pattern sequence is not detected within a predetermined period after the detection of the header pattern sequence is started. This is notified to the user of the test module 10. As a result, the user can appropriately know the occurrence of an error in which the header pattern sequence cannot be detected, and the cause of the occurrence of the error by examining the output pattern sequence stored in the fail capture memory 152 until the error occurs. Can be pursued easily.
- FIG. 3 shows an example of the header pattern detection unit 210.
- the header pattern detection unit 210 includes an input data storage unit 310, a match detection unit 320, a result storage unit 330, a result selection unit 340, and a selection result storage unit 350.
- the input data storage unit 310 sequentially stores output pattern data as input data.
- the input data storage unit 310 stores input data for each detection cycle.
- the input data storage unit 310 may be a latch circuit having the number of stages corresponding to the length of the specific pattern.
- the coincidence detection unit 320 detects the coincidence between the input data stored in the input data storage unit and the specific pattern.
- the coincidence detection unit 320 detects the coincidence between the input data and the specific pattern for each detection cycle.
- the coincidence detection unit 320 may be a parallel number of comparison circuits corresponding to the length of the specific pattern.
- the result storage unit 330 sequentially stores the detection results of the coincidence detection unit.
- the result storage unit 330 sequentially stores detection results for each detection cycle.
- the result storage unit 330 may be a pipeline circuit having the number of stages corresponding to the maximum delay of the specific pattern.
- the result selection unit 340 may be an example of a timing detection unit.
- the result selection unit 340 detects the timing at which the specific pattern is detected from the bit position of the result storage unit 330 indicating that the detection results match in the detection result for each detection cycle stored in the result storage unit 330.
- the result selection unit 340 detects the head of the header pattern at the timing of the detection command when the processing for the hunt delay is completed. For example, assuming that the number of bits in one cycle is 40, when the head of the header is detected at the fourth bit of the fifth cycle from the detection instruction, the selection result, that is, the amount of phase shift is 163 UI. When a plurality of header patterns are detected, the earliest phase data is selected as the detection result.
- the selection result storage unit 350 stores the selection result selected by the result selection unit 340.
- the selection result stored in the selection result storage unit 350 is provided to the timing adjustment unit 240 as a phase shift amount.
- FIG. 4 shows the timing of processing in which the expected value pattern sequence and the output pattern sequence are compared.
- the vector generation control unit 116 executes each instruction by an instruction execution pipeline of a plurality of stages including an instruction execution stage for executing an instruction and a comparison stage for comparing an output pattern with an expected value pattern. More specifically, in the instruction execution stage, the vector generation control unit 116 receives a plurality of instructions including a PKTST instruction instructing the start of detection of the header pattern string and a PKTEND instruction instructing the end of detection of the header pattern string. Execute sequentially for each instruction cycle.
- the PKTST instruction is an example of a detection start instruction
- the PKTEND instruction is an example of a detection end instruction.
- the sequential pattern generation unit 146 sequentially reads the expected value pattern corresponding to the instruction from the expected value pattern memory 108 for each of the plurality of instructions. For example, the sequential pattern generation unit 146 reads ED1 that is an expected value pattern corresponding to the PKTST instruction. Further, the sequential pattern generation unit 146 reads ED2 that is an expected value pattern corresponding to the NOP instruction next to the PKTST instruction.
- the comparison stage is executed after the instruction execution stage, the timing at which the expected value pattern string is input to the comparison stage is delayed from the timing at which the corresponding instruction is executed in the instruction execution stage.
- the comparator 180 acquires the output pattern output from the terminal of the DUT 100 and supplies it to the hunt compare unit 148. For example, the comparator 180 sequentially acquires the output pattern sequences D1, D2, D3,... Dn, Dn + 1, and Dn + 2 and supplies them to the hunt / compare unit 148.
- the alignment unit 220 shifts the phase of the output pattern sequence by the phase shift amount set by the timing adjustment unit 240 and outputs it to the expected value comparison unit 230.
- the timing adjustment unit 240 sets an appropriate phase shift amount in the alignment unit 220, so that ED1, ED2 at the timing when the expected value pattern sequences ED1, ED2, and ED3 are input to the comparison stage. , And adjustment to input the output pattern sequences D1, D2, D3 to be compared with ED3 to the comparison stage. Similarly, the timing adjustment unit 240 compares the output pattern sequences Dn, Dn + 1, and Dn + 2 to be compared with EDn, EDn + 1, and EDn + 2 at the timing when the expected value pattern sequences EDn, EDn + 1, and EDn + 2 are input in the comparison stage. Let the stage input. As a result, the timing adjustment unit 240 can cause each expected value pattern and an output pattern to be compared with the expected value pattern to be input to the expected value comparison unit 230 in the same cycle in synchronization.
- the expected value pattern and the output pattern can be appropriately synchronized even when the output pattern output start timing from the DUT 100 is indefinite.
- the timing adjustment unit 240 performs setting so as not to shift the output pattern by the expected value comparison unit 230.
- the expected value comparison unit 230 outputs the input output pattern sequence as it is to the expected value comparison unit 230 without shifting the phase.
- the sequential pattern generation unit 146 reads the expected value pattern sequences EDm, EDm + 1, and EDm + 2.
- the comparison stage is executed after the instruction execution stage, the timing at which the expected value pattern string is input to the comparison stage is delayed from the timing at which the corresponding instruction is executed in the instruction execution stage.
- the comparator 180 sequentially acquires the output pattern sequences Dm, Dm + 1, and Dm + 2 and supplies them to the hunt / compare unit 148.
- the alignment unit 220 outputs the output pattern sequence to the expected value comparison unit 230 without shifting the phase.
- the expected value comparison unit 230 compares the output pattern Dm + 1 and the expected value pattern EDm, and writes the comparison result Rm in the fail memory.
- the timing adjustment unit 240 when the PKTEND instruction is executed, the timing adjustment unit 240 returns the phase shift amount set in the alignment unit 220 to the state before the header pattern detection. As a result, the timing adjustment unit 240 can cause the expected value comparison unit 230 to input an expected value pattern associated with a certain instruction and an output pattern acquired from the DUT 100 when the instruction is executed. . Thereby, it is possible to control whether or not the expected value pattern and the output pattern are synchronized with respect to only part of the test of the DUT 100.
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Abstract
Description
特願2008-152191 出願日 2008年06月10日
100 DUT
102 メインメモリ
104 命令メモリ
106 試験パターンメモリ
108 期待値パターンメモリ
110 デジタルキャプチャメモリ
112 セントラルパターン制御部
114 パターンリストメモリ
116 ベクタ生成制御部
120 セントラルキャプチャ制御部
122 パターンリザルトメモリ
130 チャネルブロック
140 チャネルパターン生成部
142 シーケンシャルパターン生成部
144 フォーマット制御部
146 シーケンシャルパターン生成部
148 ハント・コンペア部
150 フェイルキャプチャ制御部
152 フェイルキャプチャメモリ
160 タイミング生成部
170 ドライバ
180 コンパレータ
200 ヘッダパターン格納部
210 ヘッダパターン検出部
220 アラインメント部
230 期待値比較部
240 タイミング調整部
250 セレクタ
260 エラー通知部
310 入力データ格納部
320 一致検出部
330 結果格納部
340 結果選択部
350 選択結果格納部
Claims (10)
- 与えられた試験パターンに応答する出力パターンを出力する被試験デバイスから特定の試験パターンの応答として出力される特定パターンを検出する特定パターン検出部と、
前記特定パターンが検出されたタイミングを検出するタイミング検出部と、
前記タイミング検出部が検出したタイミングに基づき、前記出力パターンの位相を、前記試験パターンに対する前記被試験デバイスが示す応答として期待される期待値パターンの位相に適合するよう調整する位相調整部と、
を備えた試験モジュール。 - 前記特定パターン検出部は、
前記出力パターンのデータを入力データとして順次格納する入力データ格納部と、
前記入力データ格納部に格納された前記入力データと前記特定パターンとの一致を検出する一致検出部と、
前記一致検出部の検出結果を順次格納する結果格納部と、
を有する請求項1に記載の試験モジュール。 - 前記入力データ格納部は、前記入力データを検出サイクルごとに格納し、
前記一致検出部は、前記検出サイクルごとに前記入力データと前記特定パターンとの一致を検出し、
前記結果格納部は、前記検出サイクルごとの検出結果を順次格納する、
請求項2に記載の試験モジュール。 - 前記タイミング検出部は、前記結果格納部に格納された前記検出サイクルごとの検出結果において、前記検出結果が一致したことを示す前記結果格納部のビット位置から前記特定パターンが検出されたタイミングを検出する、
請求項3に記載の試験モジュール。 - 前記入力データ格納部は、前記特定パターンの長さに相当する段数のラッチ回路であり、
前記一致検出部は、前記特定パターンの長さに相当する並列数の比較回路であり、
前記結果格納部は、前記特定パターンの最大ディレイに相当する段数のパイプライン回路である、
請求項2から請求項4の何れかに記載の試験モジュール。 - 請求項1から請求項5の何れかに記載の試験モジュールを備えた試験装置。
- 与えられた試験パターンに応答する出力パターンを出力する被試験デバイスから、特定の試験パターンの応答として出力される特定パターンを検出する特定パターン検出段階と、
前記特定パターンが検出されたタイミングを検出するタイミング検出段階と、
前記タイミング検出段階で検出したタイミングに基づき、前記出力パターンの位相を、前記試験パターンに対する前記被試験デバイスが示す応答として期待される期待値パターンの位相に適合するよう調整する位相調整段階と、
を備えた試験方法。 - 前記特定パターン検出段階は、
前記出力パターンのデータを入力データとして順次格納する入力データ格納段階と、
前記入力データ格納段階で格納された前記入力データと前記特定パターンとの一致を検出する一致検出段階と、
前記一致検出段階の検出結果を結果格納部に順次格納する結果格納段階と、
を有する請求項7に記載の試験方法。 - 前記入力データ格納段階は、前記入力データを検出サイクルごとに格納し、
前記一致検出段階は、前記検出サイクルごとに前記入力データと前記特定パターンとの一致を検出し、
前記結果格納段階は、前記検出サイクルごとの検出結果を前記結果格納部に順次格納する、
請求項8に記載の試験方法。 - 前記タイミング検出段階は、前記結果格納段階で格納された前記検出サイクルごとの検出結果において、前記検出結果が一致したことを示す前記結果格納部のビット位置から前記特定パターンが検出されたタイミングを検出する、
請求項9に記載の試験方法。
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CN200980121603.4A CN102057288B (zh) | 2008-06-10 | 2009-06-08 | 测试模块、测试装置及测试方法 |
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US7213182B2 (en) * | 2005-01-19 | 2007-05-01 | Advantest Corporation | Test apparatus and test method |
US7447955B2 (en) * | 2005-11-30 | 2008-11-04 | Advantest Corporation | Test apparatus and test method |
KR100868995B1 (ko) | 2005-12-19 | 2008-11-17 | 주식회사 아도반테스토 | 시험 장치, 조정 장치, 조정 방법, 및 조정 프로그램을기록한 기록 매체 |
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JP2001160802A (ja) * | 1999-12-02 | 2001-06-12 | Advantest Corp | 同期検出装置及び同期検出方法及びエラーレート測定装置 |
JP2006010651A (ja) * | 2004-06-29 | 2006-01-12 | Advantest Corp | 試験装置及び試験方法 |
WO2007072738A1 (ja) * | 2005-12-19 | 2007-06-28 | Advantest Corporation | 試験装置、調整装置、調整方法、および、調整プログラム |
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CN102057288A (zh) | 2011-05-11 |
JPWO2009150819A1 (ja) | 2011-11-10 |
US20110137605A1 (en) | 2011-06-09 |
TW201003098A (en) | 2010-01-16 |
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