| 摘要 |
PROBLEM TO BE SOLVED: To surely execute a fault restoration processing, even when a fault occurs in an external bus in a microcomputer system. SOLUTION: A CPU 11, a built-in ROM 12 in which a fault restoration processing program is stored and a built-in RAM are positioned and connected internally via an internal bus 18 in a microcomputer device 1 connected with groups 5 to 8 of external equipment, an external ROM 3 and an external RAM 4 via an external bus 19, when an abnormality is detected by an abnormality detection processing part 2 and an interrupt request signal 21 is outputted, a storage area required for execution of the fault restoration processing program is set in the built-in RAM 13 and a fault restoration processing program in the built-in ROM 12 is executed. |
