ERROR IDENTIFYING METHOD, DATA PROCESSING DEVICE, AND SEMICONDUCTOR DEVICE
First Claim
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1. An error identifying method of identifying an error occurring in a data transmission performed using a plurality of signal lines, comprising:
- a storing step of storing erroneous data when the error occurs during the data transmission performed using the plurality of signal lines from a transmitting device to a receiving device; and
an error identifying step of identifying an erroneous bit in the stored data by comparing bit by bit the data stored in the storing step with non-erroneous data.
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Abstract
A data processing device which performs a data transmission between semiconductor devices using a plurality of signal lines. In the data processing device, when there occurs an error in a data transmission from a transmitting device to a receiving device using a plurality of signal lines, data in which the error has occurred is stored. The stored data is compared bit by bit with non-erroneous data, thereby designating a bit in which error has occurred in the stored data.
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Citations
7 Claims
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1. An error identifying method of identifying an error occurring in a data transmission performed using a plurality of signal lines, comprising:
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a storing step of storing erroneous data when the error occurs during the data transmission performed using the plurality of signal lines from a transmitting device to a receiving device; and an error identifying step of identifying an erroneous bit in the stored data by comparing bit by bit the data stored in the storing step with non-erroneous data. - View Dependent Claims (2)
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3. A data processing device which performs a data transmission between semiconductor devices using a plurality of signal lines, comprising:
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an error determination device determining whether or not an error has occurred in the data transmission from a transmitting device to a receiving device using the plurality of signal lines; a storage device storing data in which the error has occurred and which has been received by the receiving device when the error determination device determines that the error has occurred; and an error identification device identifying an erroneous bit in the stored data by comparing bit by bit the data stored in the storage device with non-erroneous data.
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4. A semiconductor device which performs a data transmission with another semiconductor device using a plurality of signal lines, comprising:
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an error determination device determining whether or not an error has occurred in data transmitted from the other semiconductor device using the plurality of signal lines; a retransmission request device requesting the other semiconductor device to retransmit the data when the error determination device determines that the error has occurred; and an error identification device identifying an erroneous bit in received data by comparing bit by bit the retransmission data with received erroneous data when the error determination device determines that no error has occurred in the retransmission data received from the other semiconductor device at the retransmission request. - View Dependent Claims (5, 6)
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7. A semiconductor device which performs a data transmission with another semiconductor device using a plurality of signal lines, comprising:
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a line selection device selecting a signal line used in a data transmission from among the plurality of signal lines depending on a restriction request when the retransmission request for restricting the signal lines used in the data transmission in the plurality of signal lines is received from the other semiconductor device; and a transmission device performing the data transmission using the signal lines selected by the line selection device.
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Specification