| 摘要 |
PROBLEM TO BE SOLVED: To facilitate accurate fault analysis on the occurrence of a fault in a bus device or an external bus. SOLUTION: A bus device 10a, connected to both an internal bus 30 and an external bus 20, includes a local register 14 for storing first data, an internal bus controller 11, a bus configuration register 15 for storing second data, a bus interface controller 13, and a data transfer controller 12. The bus device also includes a data collector 16 for collecting from the internal bus controller at least one of the access history of the internal bus controller to the internal bus, the input/output history of the first data to the local register and the input/output history of the second data to the bus configuration register, collecting from the bus interface controller the access history of the bus interface controller to the external bus and the input/output history of the second data to the bus configuration register, and then extracting the history data and outputting it to an external memory unit through the internal bus. COPYRIGHT: (C)2008,JPO&INPIT
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