| 摘要 |
PURPOSE:To investigate when a trouble occurs in a microprocessor by always tracing the operation of the microprocessor in a memory card, writing the number of arbitrary byte in the memory card at the time of occurring abnormality, thereafter, a suspending this write operation. CONSTITUTION:The titled card is provided with an attachable/detachable memory card 13 for tracing the operation of a microcomputer built-in type device by writing an address and a data outputted from the microcomputer built-in type device, and a sample signal selecting circuit 23 for selecting a signal which is brought to sample from the microcomputer built-in type device in order to write the address and the data to this memory card 13. Also, this card is provided with address comparing circuits 26, 27 and a data comparing circuit 25, a write stop trigger selecting circuit 28 for generating a trigger signal, when an abnormal address or data is inputted, and a memory write control circuit 24 for writing a data of the number of arbitrary byte to the memory card after the trigger signal is generated, and thereafter, designating an inhibition of a write permission. In such a way, when a fault has occurred can be analyzed. |
