DATA PROCESSOR, SYSTEM AND METHOD FOR COPING WITH CABLE CONNECTION ABNORMALITY

摘要

PROBLEM TO BE SOLVED: To provide a system capable of avoiding device abnormality such as a system hang even when abnormality occurs in a connection state of a cable connecting devices.

SOLUTION: A first device 10 on a transmission side has: a processing means 12 for data; a buffer register 22 into which the processing means 12 writes the data to be transmitted; a transmission part 23 transmitting the data stored in the buffer register to a second device 40 connected by the cable 3; a transmission result confirmation part 24 receiving reception confirmation of the data from the second device; a register clearance means 25 clearing the buffer register when the transmission confirmation part receives the reception confirmation; and a loop detection means 27 detecting the abnormality of the connection state of the cable 3 during the transmission of the data. When the loop detection means detects the abnormality of the connection state, the buffer register is cleared to release the processing means from data writing waiting, and the occurrence of the abnormality is notified to the processing means.

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