| 摘要 |
PURPOSE:To prevent exertion of influence upon other systems under controlling, by performing the overrun monitor in single step unit in a microprocessor. CONSTITUTION:In the processor which generates different fetch signals for program data in case of an operation code and an operand, a means 9 is provided which generates data having difference codes for program data in case of an operation code and an operand in accordance with the address, and NAND between a fetch SYNC signal of a microprocessor 1 and instruction fetch data corresponding to the address is operated. Thus, the overrun of the microprocessor 1 is detected in single step units. The detection result is applied to the reset input of the microprocessor 1 to reset the microprocessor 1. |
