| 摘要 |
PURPOSE:To realize the semiconductor integrated circuit equipped with a program run-away detecting and controlling circuit to stop a peripheral equipment connected to the input/output terminal of a microcontroller in a safe state by detecting the generation of CPU program run-away and initializing a system concerning the microcontroller system equipped with a CPU. CONSTITUTION:A watchdog timer 5, memory control circuit part 7 and memory 8 are installed, the run-away is detected by the watchdog timer 5, a CPU 6 is inset and at the same time, the control of an address bus/data bus in the system is moved from the CPU 6 to the output of the memory 8. After the peripheral equipment is stopped in the safe state by using the input/output terminal, the reset state of the CPU 6 is released. |
