| 摘要 |
PROBLEM TO BE SOLVED: To early investigate the cause of a trouble difficult in the specification of cause. SOLUTION: A back-up register 15 for storing the history of access contents from a host computer is included in a target LSI 10. When a hang-up state occurs due to some cause, modules 14-1 to 14-3 can not respond. Thereby data are not outputted from an FIFO 12 to respective modules 14-1 to 14-3, so that data overflow from the FIFO 12. Consequently the hand-up state is left in the register 15. Therefore the stored contents of the register 15 are checked and analyzed by using an exclusive tool. |
