WO2010061482A1 - Appareil d’essai, système de transmission en série, programme, et support d'enregistrement - Google Patents

Appareil d’essai, système de transmission en série, programme, et support d'enregistrement Download PDF

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Publication number
WO2010061482A1
WO2010061482A1 PCT/JP2008/071724 JP2008071724W WO2010061482A1 WO 2010061482 A1 WO2010061482 A1 WO 2010061482A1 JP 2008071724 W JP2008071724 W JP 2008071724W WO 2010061482 A1 WO2010061482 A1 WO 2010061482A1
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Prior art keywords
transmission
data
unit
expected value
frame
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PCT/JP2008/071724
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English (en)
Japanese (ja)
Inventor
徳雄 熊木
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株式会社アドバンテスト
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Priority to PCT/JP2008/071724 priority Critical patent/WO2010061482A1/fr
Priority to JP2010540283A priority patent/JPWO2010061482A1/ja
Publication of WO2010061482A1 publication Critical patent/WO2010061482A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation

Definitions

  • the present invention relates to a test apparatus, a serial transmission system, a program, and a recording medium.
  • the semiconductor test apparatus includes a plurality of test modules. Each test module transmits / receives test data and the like to / from other test modules or a performance board on which a device under test is mounted. The test module performs data transmission through a high-speed serial bus or the like for the purpose of transmitting a large amount of data in a short time.
  • JP 57-145451 A JP 57-145451 A
  • bit error rate In communication between test modules in a semiconductor test apparatus, high reliability with a bit error rate of about 10 ⁇ 17 to 10 ⁇ 19 is required. However, the bit error rate tends to increase with the recent increase in transmission speed.
  • retransmission control As a method for improving the reliability of a transmission path, retransmission control is known in which data to be transmitted / received is framed and a frame in which a bit error occurs is retransmitted.
  • the transmission side can reliably transmit all the transmission data by retransmitting the transmission data that has not been normally received under the control of the CPU or the like.
  • retransmission control using a CPU or the like is performed in a semiconductor test apparatus that tests devices in a multitasking environment, there is a problem that the efficiency of device testing is reduced due to fluctuations in the load on the CPU.
  • an object of one aspect of the present invention is to provide a test apparatus, a serial transmission system, a program, and a recording medium that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims.
  • the dependent claims define further advantageous specific examples of the present invention.
  • a test apparatus for testing a device under test which is electrically connected to the device under test and tests the device under test, A control unit that controls the test unit; and a serial transmission unit that transmits transmission data between the control unit and the test unit.
  • the serial transmission unit receives the transmission data when the transmission side receives the transmission data.
  • a reception notification unit that transmits a confirmation signal indicating that the transmission data has been transmitted to the transmission side, and reception from the transmission side when the transmission data is not received within a predetermined period after transmission data is transmitted on the transmission side.
  • a test apparatus having a retransmission control unit for retransmitting the transmission data on the side is provided.
  • a serial transmission system for transmitting transmission data between a reception side and a transmission side, and when transmission data is received at the reception side, confirmation that the transmission data has been received
  • a reception notifying unit for transmitting a signal to the transmission side, and transmission from the transmission side to the reception side when the transmission data is transmitted on the transmission side and a confirmation signal of the transmission data is not received within a predetermined period.
  • a serial transmission system including a retransmission control unit that retransmits data is provided.
  • a program for causing a test apparatus for testing a device under test to function Functions as a control unit that controls the test unit and a serial transmission unit that transmits transmission data between the control unit and the test unit.
  • the serial transmission unit receives transmission data on the receiving side, it receives the transmission data.
  • a reception notification unit that transmits a confirmation signal indicating that the transmission data has been transmitted to the transmission side, and reception from the transmission side when the transmission data is not received within a predetermined period after transmission data is transmitted on the transmission side.
  • a program and a recording medium are provided that function as a retransmission control unit that retransmits the transmission data.
  • FIG. 1 shows a configuration of a semiconductor test apparatus 10 according to the present embodiment.
  • the structure of the serial transmission part 40 is shown.
  • a normal sequence when data is transmitted from the transmission / reception unit 100 to the transmission / reception unit 200 is shown.
  • a sequence when the transmitted DAT frame is lost is shown.
  • a sequence when the ACK frame transmitted by the transmission / reception unit 200 is lost is shown.
  • a sequence when an error has occurred in the ACK frame transmitted by the transmission / reception unit 200 is shown.
  • the 2nd structure of the serial transmission part 40 is shown.
  • a sequence in the case of transmitting a plurality of frames in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200 is shown.
  • a timing sequence during normal operation when the transmission / reception unit 100 transmits a plurality of DAT frames to the transmission / reception unit 200 is shown.
  • a timing sequence when the transmission / reception unit 200 cannot normally receive the DAT frame is shown.
  • a timing sequence when the ACK frame transmitted by the transmission / reception unit 200 is lost in the transmission medium 42 is shown.
  • a timing sequence in the case where data is transmitted from the transceiver unit 100 to the transceiver unit 200 is shown.
  • a timing sequence in which the transmission / reception unit 100 retransmits due to timeout when retransmission occurs in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200 is shown.
  • An example of the hardware constitutions of the computer 1900 which concerns on 2nd Embodiment is shown.
  • FIG. 1 shows a configuration of a semiconductor test apparatus 10 according to the present embodiment together with a device under test 50.
  • the semiconductor test apparatus 10 includes a control unit 20, a plurality of test units 30, and a plurality of serial transmission units 40.
  • the control unit 20 controls a plurality of test units 30 by executing a plurality of test control programs 22 and the like given in advance, thereby controlling tests on a plurality of devices under test 50.
  • the control unit 20 may include a CPU, for example.
  • the plurality of test units 30 are provided corresponding to the plurality of devices under test 50 or the plurality of pins of the device under test 50.
  • the control unit 20 may control these test units 30 to test a plurality of devices under test 50 in parallel.
  • Each test unit 30 is electrically connected to the device under test and tests the device under test. For example, each test unit 30 may generate data used for testing the device under test and analyze data output from the device under test.
  • the serial transmission unit 40 includes a transmission medium 42, a transmission / reception unit 100, and a transmission / reception unit 200.
  • the transmission / reception unit 100 may be provided at the end of the transmission medium 42 on the control unit 20 side.
  • the transmission / reception unit 200 may be provided at the end of the transmission medium 42 on the test unit 30 side.
  • the transmission / reception unit 100 and the transmission / reception unit 200 transmit transmission data between the control unit 20 and the test unit 30 via the transmission medium 42.
  • the transmission / reception unit 100 and the transmission / reception unit 200 cannot normally transmit / receive transmission data between the control unit 20 and the test unit 30, the transmission / reception unit 100 and the transmission / reception unit 200 restore the transmission data without being controlled by the control unit 20. Thereby, when a transmission error occurs, the transmission data can be recovered without increasing the load on the control unit 20 executing the multitask.
  • the transmission / reception unit 100 and the transmission / reception unit 200 may detect and recover a transmission error by hardware.
  • FIG. 2 shows the configuration of the serial transmission unit 40.
  • the transmission / reception unit 100 and the transmission / reception unit 200 of this example receive the transmission data
  • the transmission / reception unit 100 and the transmission / reception unit 200 notify the other party to that effect.
  • the transmission / reception unit that has transmitted the transmission data retransmits the transmission data when the other party is not notified that the transmission data has been received within a predetermined period.
  • the transmission / reception unit 100 includes a data management unit 102, a data transmission unit 104, a multiplexer 106, a data reception unit 108, a reception notification unit 110, and a retransmission control unit 112.
  • the transmission / reception unit 200 includes a data management unit 202, a data transmission unit 204, a multiplexer 206, a data reception unit 208, a reception notification unit 210, and a retransmission control unit 212.
  • the transceiver unit 100 and the transceiver unit 200 may have the same configuration.
  • the corresponding component in the transmission / reception unit 100 and the transmission / reception unit 200 may have the same function.
  • the data management unit 102 controls transmission / reception of transmission frames performed by the transmission / reception unit 100 with the transmission / reception unit 200.
  • a transmission frame a frame type including transmission data such as a test pattern (hereinafter referred to as a DAT frame) and a frame type including a confirmation signal indicating that the transmission data has been received (hereinafter referred to as an ACK frame) Will be described.
  • the data management unit 102 may transmit data input from the control unit 20 to the transmission / reception unit 200 and may output data received from the transmission / reception unit 200 to the control unit 20.
  • the data management unit 102 may include a dual port memory that can be accessed by the control unit 20, the data transmission unit 104, and the data reception unit 108.
  • the data transmission unit 104 assembles a DAT frame with identification data (hereinafter referred to as frame ID) added to the transmission data stored in the data management unit 102.
  • the data transmission unit 104 transmits the DAT frame to the transmission / reception unit 200 via the multiplexer 106.
  • the data transmission unit 104 may change the frame ID attached to the transmission data to be sequentially transmitted according to a predetermined rule for each transmission data.
  • the data transmission unit 104 may attach a frame ID including a number that is sequentially incremented for each transmission data to the transmission data.
  • the DAT frame may include a frame ID, frame type information, transmission data, and FCS (frame check sequence code) for error detection.
  • the data reception unit 108 recognizes the frame type after extracting the frame type information from the transmission frame received from the transmission / reception unit 200. If the received transmission frame is an ACK frame, the data reception unit 108 may output data included in the received ACK frame to the retransmission control unit 112. Further, when the received transmission data is a DAT frame, the data reception unit 108 may notify the reception notification unit 110 of the frame ID in the received DAT frame. Further, the data reception unit 108 may output data included in the received DAT frame to the data management unit 102.
  • the reception notification unit 110 When the data reception unit 108 receives a DAT frame from the transmission / reception unit 200, the reception notification unit 110 receives at least a part of data included in the DAT frame received by the data reception unit 108 from the data reception unit 108, An ACK frame indicating that the transmission data has been received is transmitted to the transmission / reception unit 200.
  • the reception notification unit 110 may generate an ACK frame with the same frame ID as the frame ID included in the data received from the data reception unit 108 and output the ACK frame to the multiplexer 106.
  • the multiplexer 106 may transmit the DAT frame output from the data transmission unit 104 or the ACK frame output from the reception notification unit 110 to the transmission / reception unit 200.
  • the retransmission control unit 112 controls the transmission order of DAT frames transmitted to the transmission / reception unit 200.
  • the retransmission control unit 112 receives data included in the ACK frame.
  • the data transmission unit 104 does not receive an ACK frame corresponding to the DAT frame within a predetermined period after the data transmission unit 104 transmits the DAT frame
  • the retransmission control unit 112 transmits the data transmission unit 104 to the transmission / reception unit 200.
  • the DAT frame may be retransmitted.
  • the retransmission control unit 112 may notify the data transmission unit 104 of the frame ID to be retransmitted.
  • the data transmission unit 104 may read the data to be retransmitted from the data management unit 102, attach the frame ID notified from the retransmission control unit 112 to the data, and transmit the data to the transmission / reception unit 200. .
  • the retransmission control unit 112 transmits the transmission data transmitted immediately before until the data to be transmitted next is given to the data transmission unit 104.
  • the transmission / reception unit 200 may continue to retransmit.
  • the retransmission control unit 112 may generate a frame ID according to a predetermined rule and notify the data transmission unit 104 of the frame ID.
  • the data transmission unit 104 may be notified to retransmit the DAT frame that has already been transmitted to the transmission / reception unit 200. .
  • the transmission / reception unit 200 includes a data management unit 202, a data transmission unit 204, a multiplexer 206, a data reception unit 208, a reception notification unit 210, and a retransmission control unit 212. Transmission and reception and ACK frame transmission and reception may be performed.
  • the transmission / reception unit 200 may transmit the data input from the test unit 30 to the transmission / reception unit 100, and may output the data received from the transmission / reception unit 100 to the test unit 30.
  • FIG. 3 shows a normal sequence when data is transmitted from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 100 will be described as a DAT frame transmission side and the transmission / reception unit 200 will be described as an ACK frame transmission side. However, even if the transmission / reception unit 200 operates as a DAT frame transmission side and the transmission / reception unit 100 operates as an ACK frame transmission side. Good. Further, the transmission / reception unit 100 and the transmission / reception unit 200 may transmit the DAT frame while receiving the DAT frame.
  • the data reception unit 208 receives the DAT frame (S201).
  • the data reception unit 208 outputs transmission data and the like included in the received DAT frame to the data management unit 202 (S202).
  • the data receiving unit 208 may output the transmission data and the frame ID to the data management unit 202.
  • the data receiving unit 208 notifies the reception notifying unit 210 that the transmission data has been received.
  • the data reception unit 208 may notify the reception notification unit 210 of the frame ID included in the DAT frame.
  • the reception notification unit 210 transmits an ACK frame for the received DAT frame to the transmission / reception unit 100 based on the notification received from the data reception unit 208 (S203).
  • the reception notification unit 210 may transmit an ACK frame including the same frame ID as the frame ID received from the data reception unit 208 to the transmission / reception unit 100.
  • the data reception unit 108 receives the ACK frame (S102).
  • the transmission / reception unit 100 recognizes that the transmission data corresponding to the frame ID has reached the transmission / reception unit 200 by confirming the frame ID included in the received ACK frame.
  • FIG. 4 shows a sequence when the transmitted DAT frame is lost in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 100 transmits a DAT frame (S301), but the transmitted DAT frame disappears in the transmission medium 42 (S401), the transmission / reception unit 200 outputs data to the data management unit 202 (S402). ) And transmission of the ACK frame to the transmission / reception unit 100 (S403) cannot be performed.
  • the transmission / reception unit 100 performs normal transmission / reception of the DAT frame. You may judge that it was not. For example, the transmission / reception unit 100 may measure the elapsed time after transmitting the DAT frame to the transmission / reception unit 200 for each DAT frame. When a predetermined time has passed since any DAT frame is transmitted to the transmission / reception unit 200 (S302), the retransmission control unit 112 causes the data transmission unit 104 to retransmit the DAT frame (S303). ).
  • the transmission / reception unit 200 When the transmission / reception unit 200 receives the retransmitted DAT frame (S404), the data reception unit 208 outputs the received data to the data management unit 202 (S405), and also sends the transmission / reception unit 100 to the retransmission frame.
  • An ACK frame is transmitted (S406).
  • the transmission / reception unit 100 receives the ACK frame for the retransmission frame (S304), recognizes that the retransmitted data has reached the transmission / reception unit 200, and ends transmission of the DAT frame to the transmission / reception unit 200.
  • the DAT frame disappearance has been described as an example. However, even when an error occurs in the DAT frame received by the transmission / reception unit 200, the transmission / reception unit 100 and the transmission / reception unit 200 may perform the same processing. . In this case, the data reception unit 208 may detect an error by calculating an FCS (frame check sequence) added to the DAT frame.
  • FCS frame check sequence
  • the data reception unit 208 When an error occurs in the DAT frame, the data reception unit 208 does not notify the reception notification unit 210 that the DAT frame has been received. For this reason, the transmission / reception unit 100 cannot receive an ACK frame corresponding to the DAT frame, and retransmits the DAT frame.
  • the data management unit 202 may discard the DAT frame. Note that when the data receiving unit 208 detects that there is an error in the DAT frame, the data receiving unit 208 may transmit a frame including a confirmation signal indicating that the error has been detected to the transmission / reception unit 100.
  • FIG. 5 shows a sequence when an ACK frame transmitted by the transmission / reception unit 200 is lost in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 100 transmits a DAT frame (S501).
  • the data reception unit 208 When receiving the DAT frame (S601), the data reception unit 208 outputs the data included in the received DAT frame to the data management unit 202 (S602).
  • the reception notifying unit 210 transmits an ACK frame to the transmission / reception unit 100 (S603).
  • the transmission / reception unit 100 cannot receive the ACK frame (S502).
  • the retransmission control unit 112 transmits the data to the data transmission unit 104 in S501.
  • the retransmitted DAT frame is retransmitted (S504).
  • the transmission / reception unit 100 receives an ACK frame for the retransmitted DAT frame by the same sequence as in FIG. 4, and the transmission of data from the transmission / reception unit 100 to the transmission / reception unit 200 ends (S505).
  • the transmission / reception unit 200 receives the same DAT frame a plurality of times (S604).
  • the data management unit 202 may discard the transmission data with the same frame ID as the already stored transmission data (S605).
  • FIG. 6 shows a sequence in the case where an error has occurred in the ACK frame transmitted by the transmission / reception unit 200 in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 200 When receiving the DAT frame transmitted by the transmission / reception unit 100 (S801), the transmission / reception unit 200 outputs transmission data included in the received DAT frame to the data management unit 202 (S802). Further, the transmission / reception unit 200 transmits an ACK frame for the received DAT frame (S803).
  • the transmission / reception unit 100 receives the ACK frame at the data reception unit 108, but may detect that an error has occurred in the received ACK frame (S702).
  • the data receiving unit 108 may detect an error by calculating an FCS (frame check sequence) added to the ACK frame.
  • FCS frame check sequence
  • the data reception unit 108 may have an error in the frame ID included in the ACK frame, so which DAT frame the ACK frame corresponds to Cannot be determined. For this reason, the data receiving unit 108 ignores the ACK frame. As a result, the data receiving unit 108 determines that the ACK frame for the ACK frame corresponding to the ACK frame has not been received within a predetermined period, and notifies the retransmission control unit 112 to that effect.
  • the retransmission control unit 112 instructs the data transmission unit 104 to retransmit a DAT frame that has not received an ACK frame within a predetermined period based on the notification from the data reception unit 108 (S703). Thereafter, the transmission / reception unit 100 receives the ACK frame for the retransmitted DAT frame by the same sequence as in FIG. 4, and the transmission of the DAT frame from the transmission / reception unit 100 to the transmission / reception unit 200 ends (S704).
  • the transmission / reception unit 200 receives the same DAT frame a plurality of times (S804).
  • the data management unit 202 may discard the transmission data with the same frame ID as the already stored transmission data (S805).
  • FIG. 7 shows a second configuration of the serial transmission unit 40.
  • the transmission / reception unit 100 further includes an expected ID value comparison unit 114, an expected ID value update unit 116, and an expected ID value storage unit 118 in addition to the configuration shown in FIG.
  • the transmission / reception unit 200 further includes an expected ID value comparison unit 214, an expected ID value update unit 216, and an expected ID value storage unit 218.
  • the corresponding components in the transmission / reception unit 100 and the transmission / reception unit 200 may have the same function.
  • the ID expected value storage unit 118 stores the expected value of the frame ID attached to the transmission data received by the data receiving unit 108.
  • the expected ID value storage unit 118 may store the expected value of the frame ID for each frame type.
  • the expected ID value storage unit 118 may function as a data ID expected value storage unit that stores an expected DAT frame ID value for a DAT frame, and an expected ACK frame ID value for an ACK frame. It may function as a confirmation ID expected value storage unit to be stored. Further, the expected ID value storage unit 118 may update the expected value to be stored under the control of the expected ID value update unit 116.
  • the ID expected value comparison unit 114 compares the frame ID attached to the transmission data received by the data receiving unit 108 with the expected value stored in the ID expected value storage unit 118.
  • the expected ID value comparison unit 114 may compare the frame ID and the expected value for each frame type.
  • the expected ID value comparison unit 114 may function as a data ID expected value comparison unit that compares a frame ID with an expected DAT frame ID value for a DAT frame, and a frame ID for an ACK frame.
  • an ACK frame ID may function as a confirmation ID expected value comparison unit.
  • the ID expected value update unit 116 receives the comparison result from the ID expected value comparison unit 114. Also, the ID expected value update unit 116, when the frame ID attached to the transmission data received by the data receiving unit 108 matches the expected value stored in the ID expected value storage unit 118, The expected value stored in the storage unit 118 is updated based on a predetermined rule.
  • the expected ID value updating unit 116 may update the expected value for each frame type. For example, the expected ID value update unit 116 may function as a data ID expected value update unit that updates the expected DAT frame ID value for the DAT frame, and the expected ACK frame ID value for the ACK frame. It may function as a confirmation ID expected value update unit to be updated.
  • the expected ID value updating unit 116 may update each expected ID value by incrementing the ID value by one. More specifically, when the frame ID of the latest DAT frame received by the data reception unit 108 from the transmission / reception unit 200 is “2”, the frame ID of the DAT frame to be received next is “3”. Therefore, the expected ID value storage unit 118 stores “3” as the expected DAT frame ID value to be received.
  • the ID expected value comparison unit 114 informs the ID expected value update unit 116 that the comparison results match. Notice. If the comparison result matches, the ID expected value update unit 116 may instruct the ID expected value storage unit 118 to update the stored DAT frame ID expected value to “4”. .
  • the expected ID value storage unit 118 updates the stored DAT frame ID expected value to “4” based on an instruction from the expected ID value update unit 116.
  • the ID expected value comparison unit 114 notifies the ID expected value update unit 116 that the comparison results do not match. . If the comparison result does not match, the ID expected value update unit 116 does not output an instruction to update the stored DAT frame ID expected value to the ID expected value storage unit 118.
  • the ID expected value comparison unit 114 may notify the data reception unit 108 of the comparison result. Based on the comparison result received from the ID expected value comparison unit 114, the data reception unit 108 may control whether or not to output data included in the received transmission data to a subsequent circuit. For example, the data reception unit 108, when the frame ID of the DAT frame received from the transmission / reception unit 200 is different from the frame ID determined by a predetermined rule based on the comparison result received from the ID expected value comparison unit 114, The output of transmission data to the data management unit 102 may be stopped. Further, the data receiving unit 108 may resume outputting the transmission data to the data management unit 102 when receiving transmission data with a frame ID determined by a predetermined rule.
  • the data reception unit 108 when receiving a notification from the expected ID value comparison unit 114 that the frame ID of the received DAT frame is different from the expected DAT frame ID value, the data reception unit 108 outputs the received data to the data management unit 102. You can discard it without doing it. In addition, when receiving a notification from the expected ID value comparison unit 114 that the frame ID of the received DAT frame matches the expected DAT frame ID value, the data reception unit 108 sends the received data to the data management unit 102. May be output.
  • the data receiving unit 108 discards the transmission data included in the received DAT frame again when the DAT frame having the same frame ID as the frame ID of the ACK frame transmitted by the reception notifying unit 110 is received again. You can do it. Further, the reception notifying unit 110 may transmit an ACK frame for the DAT frame received again to the transmission / reception unit 200.
  • FIG. 8 shows a sequence in the case of transmitting a plurality of DAT frames in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 100 transmits a DAT frame 0 (a frame whose frame ID is “0”) (S901).
  • the data receiving unit 208 acquires the frame ID “0” attached to the received frame.
  • the data reception unit 208 notifies the reception notification unit 210 of the acquired frame ID. Furthermore, the data reception unit 208 instructs the reception notification unit 210 to transmit an ACK frame with the notified frame ID to the transmission / reception unit 100. The reception notification unit 210 transmits ACK frame 0 to the transmission / reception unit 100 based on an instruction from the data reception unit 208 (S1003).
  • the data reception unit 208 outputs the acquired frame ID to the ID expected value comparison unit 214.
  • the expected ID value comparison unit 214 reads the expected DAT frame ID value stored in the expected ID value storage unit 218 and compares it with the frame ID received from the data reception unit 208. In the initial state, “0” is stored in the expected ID value storage unit 218 as the expected DAT frame ID value.
  • the ID expected value comparison unit 214 uses the DAT frame in which the frame ID received from the data reception unit 208 is stored in the ID expected value storage unit 218. It is determined that the ID matches the expected value. The expected ID value comparison unit 214 notifies the data reception unit 208 and the expected ID value update unit 216 of the result of comparing the frame IDs.
  • the expected ID value updating unit 216 determines that normal transmission data has been received because the comparison results match, and updates the expected DAT frame ID value stored in the expected ID value storage unit 218 to “1”. .
  • the data reception unit 208 determines that normal transmission data has been received, and outputs the received transmission data to the data management unit 202 (S1002).
  • the transmission / reception unit 100 transmits DAT frame 1 and DAT frame 2 following DAT frame 0 (S902, S903). However, in this example, the DAT frame 1 is lost in the transmission medium 42 (S1004). Therefore, the data receiving unit 208 receives the DAT frame 2 without receiving the DAT frame 1 (S1005).
  • the data receiving unit 208 When receiving the DAT frame 2, the data receiving unit 208 acquires the frame ID “2” attached to the received frame, and outputs the frame ID “2” to the reception notifying unit 210 and the expected ID value comparing unit 214.
  • the reception notification unit 210 transmits the ACK frame 2 to the transmission / reception unit 100 (S1007).
  • the expected ID value comparison unit 214 compares the expected DAT frame ID value “1” stored in the expected ID value storage unit 218 with the frame ID “2” received from the data reception unit 208.
  • the expected ID value comparison unit 214 notifies the data reception unit 208 and the expected ID value update unit 216 that the comparison results do not match.
  • the data receiving unit 208 determines that normal transmission data has not been received, and stops outputting the received transmission data to the data management unit 202 (S1006). Further, the expected ID value updating unit 216 does not update the expected value stored in the expected ID value storage unit 218 because the comparison results do not match.
  • the retransmission control unit 112 instructs the data transmission unit 104 to repeat retransmission of the DAT frame 2 when the data management unit 102 does not have the transmission data to be transmitted next after the transmission of the DAT frame 2. (S904, S906, S907). In the meantime, the data receiving unit 108 receives the ACK frame 0 transmitted by the transmitting / receiving unit 200 (S908).
  • the data receiving unit 108 acquires the frame ID “0” from the received ACK frame 0.
  • the data reception unit 108 outputs the acquired frame ID to the ID expected value comparison unit 114.
  • the expected ID value comparison unit 114 reads the expected value of the frame ID for the ACK frame stored in the expected ID value storage unit 118 and compares it with the frame ID received from the data reception unit 108.
  • the expected ID value comparison unit 114 determines that the frame ID received from the data reception unit 108 matches the expected ACKID frame value stored in the expected ID value storage unit 118.
  • the expected ID value comparison unit 114 notifies the data reception unit 108 and the expected ID value update unit 116 of the result of comparing the frame IDs.
  • the expected ID value update unit 116 determines that the expected ACK frame has been received because the comparison results match, and sets the expected ACK frame ID value stored in the expected ID value storage unit 118 to “1”. Update.
  • the data reception unit 108 notifies the retransmission control unit 112 that the comparison results match.
  • the retransmission control unit 112 recognizes that the transmitted DAT frame 0 has reached the transmission / reception unit 200 and does not retransmit the DAT frame 0.
  • the data receiving unit 208 receives the ACK frame 2.
  • the data receiving unit 108 acquires the frame ID “2” from the received ACK frame 2.
  • the data reception unit 108 outputs the acquired frame ID to the ID expected value comparison unit 114.
  • the expected ID value comparison unit 114 reads the expected ACK frame ID value stored in the expected ID value storage unit 118 and compares it with the frame ID received from the data reception unit 108.
  • the expected ID storage unit 118 stores “1” as the expected DAT frame ID. Therefore, the expected ID value comparison unit 114 determines that the frame ID “2” received from the data reception unit 108 does not match the expected ACK frame ID value “1” stored in the expected ID value storage unit 118. The expected ID value comparison unit 114 notifies the data reception unit 108 and the expected ID value update unit 116 of the result of comparing the frame IDs. The expected ID value update unit 116 does not update the expected ACK frame ID value stored in the expected ID value storage unit 118 because the comparison result does not match.
  • the data receiving unit 108 notifies the retransmission control unit 112 that the frame ID of the received ACK frame 2 does not match the expected ACK frame ID value.
  • the retransmission control unit 112 recognizes that it is necessary to retransmit the DAT frame 1 based on the notification from the data receiving unit 108. Therefore, the retransmission control unit 112 instructs the data transmission unit 104 to retransmit the DAT frame 1.
  • the data transmission unit 104 acquires transmission data transmitted by the DAT frame 1 from the data management unit 102 based on an instruction from the retransmission control unit 112. Further, the data transmission unit 104 assembles the DAT frame 1 with the frame ID “1” added to the transmission data acquired from the data management unit 102, and retransmits the DAT frame 1 to the transmission / reception unit 200 (S909). The retransmission control unit 112 may further cause the data transmission unit 104 to transmit the DAT frame 2 and the DAT frame 3 (S910, S911).
  • the data receiving unit 208 receives the DAT frame 1 retransmitted by the data transmitting unit 104 (S1014). When receiving the DAT frame 1, the data receiving unit 208 acquires the frame ID “1” attached to the received frame.
  • the data reception unit 208 notifies the reception notification unit 210 of the acquired frame ID and instructs the transmission / reception unit 100 to transmit an ACK frame with the acquired frame ID.
  • the reception notification unit 210 transmits ACK frame 1 to the transmission / reception unit 100 based on the instruction of the data reception unit 208 (S1016).
  • the data reception unit 208 outputs the acquired frame ID to the ID expected value comparison unit 214.
  • the expected ID value comparison unit 214 reads the expected DAT frame ID value stored in the expected ID value storage unit 218 and compares it with the frame ID received from the data reception unit 208.
  • the expected ID value storage unit 218 stores “1” as the expected DAT frame ID value.
  • the expected ID value comparison unit 214 determines that the frame ID “1” received from the data reception unit 208 matches the expected DAT frame ID value “1” stored in the expected ID value storage unit 218.
  • the expected ID value comparison unit 214 notifies the data reception unit 208 and the expected ID value update unit 216 of the result of comparing the frame IDs.
  • the ID expected value update unit 216 determines that the normal transmission data has been received because the comparison results match, and updates the expected value stored in the ID expected value storage unit 218 to “2”. Further, since the comparison results match, the data reception unit 208 determines that normal transmission data has been received, and outputs the received transmission data to the data management unit 202. Thereafter, the data reception unit 208 may perform the same processing on the received DAT frame 2 and DAT frame 3 and output the received transmission data to the data management unit 202.
  • FIG. 9 shows a timing sequence during normal operation when the transmission / reception unit 100 transmits a plurality of DAT frames to the transmission / reception unit 200.
  • the “frame period” indicates the time for transmitting the maximum length frame.
  • the transmission / reception unit 100 and the transmission / reception unit 200 may transmit / receive the DAT frame and the ACK frame at intervals of the frame period regardless of the frame length of the frame to be transmitted.
  • the “transmission side data write” signal is a signal for the control unit 20 to write data to the data management unit 102.
  • the control unit 20 may change the “transmission side data write” signal to the H level and write the data to the data management unit 102 when there is “empty” in which the data management unit 102 writes the data.
  • the retransmission control unit 112 controls the order in which DAT frames are transmitted based on the ACK frame.
  • the retransmission control unit 112 instructs the data transmission unit 104 to transmit a DAT frame including new transmission data when the expected value of the ACK frame ID matches the frame ID of the received ACK frame. May be issued.
  • the data transmission unit 104 may read the transmission data from the data management unit 102 and generate a DAT frame and transmit it to the transmission / reception unit 200.
  • the retransmission control unit 112 instructs the data transmission unit 104 to retransmit the DAT frame transmitted immediately before. Good.
  • the data transmission unit 104 transmits the DAT frame 0 over a 4-frame period.
  • T101 when the transmission side data write signal becomes H level and data is written to the data management unit 102, the data transmission unit 104 transmits a DAT frame with the frame ID “1”. Similarly, the data transmission unit 104 may update the transmission side DAT frame ID and transmit a DAT frame each time data is written in the data management unit 102.
  • “Expected ACK frame ID value” indicates the expected frame ID value for the ACK frame stored in the expected ID value storage unit 118.
  • the “ACK frame ID incoming value” indicates the frame ID attached to the ACK frame received from the transmission / reception unit 200 by the data reception unit 108.
  • the ACK frame ID return value indicates the frame ID attached to the ACK frame transmitted from the transmission / reception unit 200 to the transmission / reception unit 100.
  • “Received DAT frame” indicates a DAT frame received by the transmission / reception unit 200.
  • the reason why the “reception DAT frame” is delayed by about three frame periods from the “transmission DAT frame” is a transmission delay that occurs in the transmission medium 42 between the transmission / reception unit 100 and the transmission / reception unit 200.
  • the “DAT frame ID expected value” is an expected DAT frame ID value stored in the expected ID value storage unit 218.
  • “Receiver side data output” indicates data output to the data management unit 202 by the data receiving unit 208 that has received the DAT frame.
  • the DAT frame 1 transmitted by the data transmission unit 104 at T101 is received by the data reception unit 208 at T102.
  • the data reception unit 208 acquires the frame ID “1” from the received DAT frame 1 and notifies the ID expected value comparison unit 214 of the acquired frame ID.
  • the expected ID value comparison unit 214 compares the expected DAT frame ID value stored in the expected ID value storage unit 218.
  • the expected ID value comparison unit 214 notifies the data reception unit 208 and the expected ID value update unit 216 of the comparison result.
  • the ID expected value update unit 216 receives the notification of the comparison result and updates the DAT frame ID expected value stored in the ID expected value storage unit 218 to “2”.
  • the data reception unit 208 outputs the transmission data included in the received DAT frame 1 to the data management unit 202. Further, the data receiving unit 208 instructs the reception notifying unit 210 to transmit ACK frame 1.
  • the reception notification unit 210 transmits the ACK frame 1 based on the instruction from the data reception unit 208. Further, the data reception unit 208 may output the data included in the received DAT frame 1 to the data management unit 202 (T103).
  • the data receiving unit 108 receives the ACK frame 1 transmitted by the reception notifying unit 210.
  • the data reception unit 108 acquires the frame ID “1” from the received ACK frame 1 and notifies the ID expected value comparison unit 114 of the acquired frame ID.
  • the expected ID value comparison unit 114 compares the expected ACK frame ID value stored in the expected ID value storage unit 118.
  • the ID expected value comparison unit 114 notifies the data reception unit 108 and the ID expected value update unit 116 of the comparison result.
  • the expected ID value update unit 116 updates the expected ACK frame ID value stored in the expected ID value storage unit 118 to “2” (T104). Thereafter, the transmission / reception unit 100 can continuously transmit a plurality of DAT frames by repeating the same procedure.
  • FIG. 10 shows a timing sequence when the transmission / reception unit 200 cannot normally receive the DAT frame in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the DAT frame 4 transmitted by the transmission / reception unit 100 is lost in the transmission medium 42 (T111).
  • the data receiving unit 208 should receive the DAT frame 4, but has received the DAT frame 5 in the next frame period due to the disappearance of the DAT frame 4.
  • the data receiving unit 208 When receiving the DAT frame 5, the data receiving unit 208 acquires the frame ID “5” from the received DAT frame 5. The data reception unit 208 outputs the acquired frame ID to the ID expected value comparison unit 214.
  • the expected ID value comparison unit 214 compares the expected DAT frame ID value “4” stored in the expected ID value storage unit 218 and notifies the expected ID value update unit 216 of the comparison result.
  • the expected ID value updating unit 216 does not update the expected value stored in the expected ID value storage unit 218 because the comparison results do not match.
  • the data reception unit 208 notifies the reception notification unit 210 that the DAT frame 5 has been received.
  • the reception notification unit 210 transmits the ACK frame 5 to the transmission / reception unit 100 based on the notification from the data reception unit 208.
  • the data receiving unit 108 acquires the frame ID “5” from the received ACK frame 5.
  • the data reception unit 108 outputs the acquired frame ID to the ID expected value comparison unit 114.
  • the expected ID value comparison unit 114 compares the expected ACK frame ID value “4” stored in the expected ID value storage unit 118 and notifies the data reception unit 108 and the expected ID value update unit 116 of the comparison result ( T112).
  • the expected ID value update unit 116 does not update the expected value stored in the expected ID value storage unit 118.
  • the data reception unit 108 notifies the retransmission control unit 112 that the comparison results do not match. Based on the notification, the retransmission control unit 112 determines that the DAT frame 4 needs to be retransmitted, and requests the data transmission unit 104 to retransmit the DAT frame 4.
  • the data transmission unit 104 reads the data of the DAT frame 4 from the data management unit 102, generates the DAT frame 4 with the frame ID “4”, and transmits the data to the transmission / reception unit 200.
  • the data reception unit 208 receives the DAT frame 4 at T113 and outputs the transmission data included in the received DAT frame 4 to the data management unit 202.
  • the transmission / reception unit 100 can quickly detect that the transmitted DAT frame 4 has not arrived at the transmission / reception unit 200 and retransmit the DAT frame 4.
  • FIG. 11 shows a timing sequence when the ACK frame transmitted by the transmission / reception unit 200 disappears in the transmission medium 42 in the data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the transmission / reception unit 200 normally receives DAT frame 0 to DAT frame 8. Therefore, the data reception unit 208 outputs the received transmission data to the data management unit 202.
  • the ACK frame 4 transmitted by the transmission / reception unit 200 at T121 is lost in the transmission medium 42.
  • the data receiving unit 108 receives the ACK frame 5 after receiving the ACK frame 3.
  • the transmission / reception unit 100 retransmits the DAT frame 4.
  • the data receiving unit 208 receives the DAT frame 4 and acquires the frame ID “4”.
  • FIG. 12 shows a timing sequence when data is transmitted from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the unit of numerical values in the figure is microseconds.
  • the data transmission rate is 800 Mbps (100 MHz ⁇ 1 Byte)
  • the frame data length is 2048 Kbit (256 Bytes).
  • the time required to transmit one frame is 2.56 microseconds.
  • the transmission delay time from when the transmission / reception unit 100 transmits the DAT frame to when the transmission / reception unit 200 receives the DAT frame is 3 microseconds. Based on the above conditions, in FIG. 12, the transmission / reception unit 200 detects the leading portion of the DAT frame A at T201 three microseconds after the transmission / reception unit 100 starts transmitting the DAT frame A.
  • the transmission / reception unit 200 transmits an ACK frame to the transmission / reception unit 100 when detecting a frame ID in T202.
  • the transmission / reception unit 100 receives the ACK frame transmitted by the transmission / reception unit 100 at T205.
  • the transmission / reception unit 200 may transmit a NACK frame including a confirmation signal notifying the occurrence of the error at T204.
  • the transmission / reception unit 100 receives the NACK frame at T206.
  • the transmitting / receiving unit 100 transmits DAT frames B, C, and D at time T206.
  • the transmission / reception unit 100 may stop transmission of the DAT frame E scheduled to be transmitted next and retransmit the DAT frame having the frame ID indicated by the NACK frame.
  • the transmission / reception unit 200 may discard them.
  • FIG. 13 shows a timing sequence in which the transmission / reception unit 100 retransmits due to timeout when retransmission occurs in data transmission from the transmission / reception unit 100 to the transmission / reception unit 200.
  • the DAT frame A is lost in the transmission medium 42 and the transmission / reception unit 200 cannot receive the DAT frame A.
  • the numerical values in the figure indicate the number of delay circuits included in the transmission / reception unit 100 and the transmission / reception unit 200.
  • a one-stage delay circuit causes a delay of 10 nanoseconds. Therefore, when the number of delay stages is 300, it indicates that a delay of 3 microseconds occurs.
  • the “waiting for retransmission” signal is a signal indicating that the data receiving unit 208 is in a waiting state for retransmission.
  • the data reception unit 208 may change the “waiting for retransmission” signal to the H level when the DAT frame expected to be received is not received.
  • the “data output” signal is a signal indicating whether or not the data received by the data reception unit 208 may be output to the data management unit 202.
  • the data reception unit 208 may change the “data output” signal to the L level when the DAT frame expected to be received is not received.
  • the data reception unit 208 may output the transmission data included in the received DAT frame X when the data output signal is at the H level when the DAT frame X is normally received. (T301). Thereafter, the data receiving unit 208 receives the DAT frame B at T303 without receiving the DAT frame A. Since the data reception unit 208 has not received the DAT frame A, the data output signal to the data management unit 202 may be stopped by changing the data output signal to the L level.
  • the data receiving unit 208 may include a buffer that accumulates DAT frames received after the DAT frame B.
  • the transmitting / receiving unit 200 transmits an ACK frame at T302.
  • the transmission / reception unit 100 receives the ACK frame at T304.
  • the transmitting / receiving unit 200 does not transmit an ACK frame for the DAT frame A. Therefore, the transmission / reception unit 100 does not receive an ACK frame at T304.
  • the transmission / reception unit 100 may cause the retransmission control unit 112 to generate a timeout at time T305.
  • the retransmission control unit 112 determines that the DAT frame A needs to be retransmitted, and retransmits the DAT frame A.
  • the retransmission control unit 112 may sequentially generate timeouts for each frame ID of the transmitted DAT frame.
  • the data reception unit 208 completes reception of the DAT frame A at T306.
  • the data receiving unit 208 may output the DAT frames B to F that have already been received and stored in the buffer to the data management unit 202.
  • the data reception unit 208 may output the data of the DAT frame G to the data management unit 202 following the data of the DAT frame F.
  • the transmission / reception unit 100 and the transmission / reception unit 200 quickly detect that the transmitted transmission frame is lost in the transmission medium 42 even when the transmitted DAT frame or ACK frame is lost in the transmission medium 42. it can. Furthermore, the transmission / reception unit 100 and the transmission / reception unit 200 can reliably transmit data even when an error occurs in the transmission medium 42 by retransmitting the DAT frame transmitted according to the detection result. Since the transmission / reception unit 100 and the transmission / reception unit 200 perform the retransmission control, the performance of the control unit 20 is not affected even in a multitasking environment where a plurality of test control programs 22 operate in the control unit 20.
  • the data transmission unit 104 acquires data from the data management unit 102, but the data transmission unit 104 may acquire data from the control unit 20. Although the data received by the data receiving unit 208 is output to the data management unit 202, the data receiving unit 208 may output the received data to the test unit 30.
  • serial transmission unit 40 is connected only to the control unit 20 and the test unit 30.
  • the serial transmission unit 40 can obtain the same effect even in a configuration connected to other serial transmission units.
  • FIG. 14 shows an example of a hardware configuration of a computer 1900 according to the second embodiment.
  • a computer 1900 according to this embodiment is connected to a CPU peripheral unit having a CPU 2000, a RAM 2020, a graphic controller 2075, and a display device 2080 that are connected to each other by a host controller 2082, and to the host controller 2082 by an input / output controller 2084.
  • Input / output unit having communication interface 2030, hard disk drive 2040, and CD-ROM drive 2060, and legacy input / output unit having ROM 2010, flexible disk drive 2050, and input / output chip 2070 connected to input / output controller 2084 With.
  • the host controller 2082 connects the RAM 2020 to the CPU 2000 and the graphic controller 2075 that access the RAM 2020 at a high transfer rate.
  • the CPU 2000 operates based on programs stored in the ROM 2010 and the RAM 2020 and controls each unit.
  • the graphic controller 2075 acquires image data generated by the CPU 2000 or the like on a frame buffer provided in the RAM 2020 and displays it on the display device 2080.
  • the graphic controller 2075 may include a frame buffer for storing image data generated by the CPU 2000 or the like.
  • the input / output controller 2084 connects the host controller 2082 to the communication interface 2030, the hard disk drive 2040, and the CD-ROM drive 2060, which are relatively high-speed input / output devices.
  • the communication interface 2030 communicates with other devices via a network.
  • the hard disk drive 2040 stores programs and data used by the CPU 2000 in the computer 1900.
  • the CD-ROM drive 2060 reads a program or data from the CD-ROM 2095 and provides it to the hard disk drive 2040 via the RAM 2020.
  • the ROM 2010, the flexible disk drive 2050, and the relatively low-speed input / output device of the input / output chip 2070 are connected to the input / output controller 2084.
  • the ROM 2010 stores a boot program that the computer 1900 executes at startup and / or a program that depends on the hardware of the computer 1900.
  • the flexible disk drive 2050 reads a program or data from the flexible disk 2090 and provides it to the hard disk drive 2040 via the RAM 2020.
  • the input / output chip 2070 connects the flexible disk drive 2050 to the input / output controller 2084 and inputs / outputs various input / output devices via, for example, a parallel port, a serial port, a keyboard port, a mouse port, and the like. Connect to controller 2084.
  • the program provided to the hard disk drive 2040 via the RAM 2020 is stored in a recording medium such as the flexible disk 2090, the CD-ROM 2095, or an IC card and provided by the user.
  • the program is read from the recording medium, installed in the hard disk drive 2040 in the computer 1900 via the RAM 2020, and executed by the CPU 2000.
  • a program installed in the computer 1900 and causing the computer 1900 to function as the semiconductor test apparatus 10 causes the computer 1900 to function as the control unit 20, the test unit 30, and the serial transmission unit 40.
  • the program sends a confirmation signal indicating that the transmission data has been received to the transmission side, and after transmitting the transmission data on the transmission side.
  • a retransmission control module for retransmitting the transmission data from the transmission side to the reception side when the confirmation signal of the transmission data is not received within a predetermined period.
  • the information processing described in these programs is read into the computer 1900, whereby the reception notification unit 110 and the retransmission control unit 112, which are specific means in which the software and the various hardware resources described above cooperate. Function as. And the specific semiconductor test apparatus 10 according to the use purpose is constructed
  • the CPU 2000 executes a communication program loaded on the RAM 2020 and executes a communication interface based on the processing content described in the communication program.
  • a communication process is instructed to 2030.
  • the communication interface 2030 reads transmission data stored in a transmission buffer area or the like provided on a storage device such as the RAM 2020, the hard disk drive 2040, the flexible disk 2090, or the CD-ROM 2095, and sends it to the network.
  • the reception data transmitted or received from the network is written into a reception buffer area or the like provided on the storage device.
  • the communication interface 2030 may transfer transmission / reception data to / from the storage device by a DMA (direct memory access) method. Instead, the CPU 2000 transfers the storage device or the communication interface 2030 as a transfer source.
  • the transmission / reception data may be transferred by reading the data from the data and writing the data to the communication interface 2030 or the storage device of the transfer destination.
  • the CPU 2000 is all or necessary from among files or databases stored in an external storage device such as a hard disk drive 2040, a CD-ROM drive 2060 (CD-ROM 2095), and a flexible disk drive 2050 (flexible disk 2090). This portion is read into the RAM 2020 by DMA transfer or the like, and various processes are performed on the data on the RAM 2020. Then, CPU 2000 writes the processed data back to the external storage device by DMA transfer or the like.
  • an external storage device such as a hard disk drive 2040, a CD-ROM drive 2060 (CD-ROM 2095), and a flexible disk drive 2050 (flexible disk 2090).
  • the RAM 2020 and the external storage device are collectively referred to as a memory, a storage unit, or a storage device.
  • Various types of information such as various programs, data, tables, and databases in the present embodiment are stored on such a storage device and are subjected to information processing.
  • the CPU 2000 can also store a part of the RAM 2020 in the cache memory and perform reading and writing on the cache memory. Even in such a form, the cache memory bears a part of the function of the RAM 2020. Therefore, in the present embodiment, the cache memory is also included in the RAM 2020, the memory, and / or the storage device unless otherwise indicated. To do.
  • the CPU 2000 performs various operations, such as various operations, information processing, condition determination, information search / replacement, etc., described in the present embodiment, specified for the data read from the RAM 2020 by the instruction sequence of the program. Is written back to the RAM 2020. For example, when performing the condition determination, the CPU 2000 determines whether the various variables shown in the present embodiment satisfy the conditions such as large, small, above, below, equal, etc., compared to other variables or constants. When the condition is satisfied (or not satisfied), the program branches to a different instruction sequence or calls a subroutine.
  • the CPU 2000 can search for information stored in a file or database in the storage device. For example, in the case where a plurality of entries in which the attribute value of the second attribute is associated with the attribute value of the first attribute are stored in the storage device, the CPU 2000 displays the plurality of entries stored in the storage device. The entry that matches the condition in which the attribute value of the first attribute is specified is retrieved, and the attribute value of the second attribute that is stored in the entry is read, thereby associating with the first attribute that satisfies the predetermined condition The attribute value of the specified second attribute can be obtained.
  • the program or module shown above may be stored in an external recording medium.
  • an optical recording medium such as DVD or CD
  • a magneto-optical recording medium such as MO
  • a tape medium such as an IC card, and the like
  • a storage device such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium, and the program may be provided to the computer 1900 via the network.
  • the transmission / reception unit and the transmission / reception unit perform the retransmission control, the performance of the control unit is not affected even in a multitasking environment where a plurality of test control programs operate in the control unit.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Communication Control (AREA)

Abstract

L’invention concerne un appareil d’essai semi-conducteur pourvu d’unités de transmission en série dont chacune transmet les données de transmission entre une unité d’essai qui est connectée électriquement à un dispositif à éprouver pour tester le dispositif et une unité de commande qui commande l’unité d’essai. L’unité de transmission en série est pourvue d'une partie rapport de réception et d’une partie commande de retransmission. La partie rapport de réception transmet au côté transmission un signal de confirmation pour recevoir les données de transmission, lorsque le côté réception reçoit les données de transmission. Si le signal de confirmation des données de transmission n'est pas reçu dans une période prédéterminée après transmission des données de transmission par le côté transmission, la partie commande de retransmission commande au côté transmission de retransmettre les données de transmission au côté réception. De cette manière, les données peuvent être transmises et reçues en toute fiabilité même en cas d’erreur de données pendant une transmission en série.
PCT/JP2008/071724 2008-11-28 2008-11-28 Appareil d’essai, système de transmission en série, programme, et support d'enregistrement WO2010061482A1 (fr)

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JP2010540283A JPWO2010061482A1 (ja) 2008-11-28 2008-11-28 試験装置、シリアル伝送システム、プログラム、および、記録媒体

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JP2014023013A (ja) * 2012-07-20 2014-02-03 Canon Inc 通信制御装置及び通信制御方法

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JPS57145451A (en) * 1981-03-04 1982-09-08 Kokusai Denshin Denwa Co Ltd <Kdd> Automatic retransmitting system of data
JPH02100538A (ja) * 1988-10-07 1990-04-12 Japan Radio Co Ltd ローカルエリアネットワークのデータ通信方法
JPH07182006A (ja) * 1993-12-22 1995-07-21 Nippon Steel Corp 薄板自動機械試験における試験実績復帰方法
JP2003519451A (ja) * 1999-07-16 2003-06-17 クゥアルコム・インコーポレイテッド 音声オーバデータ通信システムにおける効率の良いデータ送信のための方法及び装置
JP2005039360A (ja) * 2003-07-16 2005-02-10 Ics:Kk 仮想化した入出力通信ポートを複数対具備するマルチ通信試験装置および方法
JP2006517026A (ja) * 2003-01-10 2006-07-13 株式会社アドバンテスト ピン校正データ、コマンドその他のデータを非揮発性メモリに保存する半導体試験システム

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Publication number Priority date Publication date Assignee Title
JPS57145451A (en) * 1981-03-04 1982-09-08 Kokusai Denshin Denwa Co Ltd <Kdd> Automatic retransmitting system of data
JPH02100538A (ja) * 1988-10-07 1990-04-12 Japan Radio Co Ltd ローカルエリアネットワークのデータ通信方法
JPH07182006A (ja) * 1993-12-22 1995-07-21 Nippon Steel Corp 薄板自動機械試験における試験実績復帰方法
JP2003519451A (ja) * 1999-07-16 2003-06-17 クゥアルコム・インコーポレイテッド 音声オーバデータ通信システムにおける効率の良いデータ送信のための方法及び装置
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JP2005039360A (ja) * 2003-07-16 2005-02-10 Ics:Kk 仮想化した入出力通信ポートを複数対具備するマルチ通信試験装置および方法

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JP2014023013A (ja) * 2012-07-20 2014-02-03 Canon Inc 通信制御装置及び通信制御方法

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