| 摘要 |
PROBLEM TO BE SOLVED: To prevent, in advance, execution of unintended interruption processing.SOLUTION: A microcomputer includes a ROM. A vector table is assigned to memory space addresses A780h to A7A7h of the ROM. In the vector table, the memory space addresses A780h to A79Fh are used for a CALLV instruction, and the memory space addresses A7A0h to A7A7h are used for interruption processing. When a value set to the vector table is a value other than 0000h, 8000h to HPRGEND, activation of the microcomputer is limited.SELECTED DRAWING: Figure 23 |
