| 摘要 |
PROBLEM TO BE SOLVED: To suppress the execution of an unintended access.SOLUTION: An ECU 1 switches states of a program in an ASILPRG area 46 and data in an ASILRAM area 45 and the ASILPRG area 46 from access prohibited states to access permission states when a QM program executed by a CPU 11 is to access an ASIL program. The ECU 1 determines whether an access is permitted to an address for which a write request by the ASIL program is generated on the basis of access permission area information stored in an access permission storage area 30 if the QM program is to access the ASIL program. Subsequently, the ECU 1 executes writing data to the address for which the write request is generated if the access is permitted, and prohibits the data from being written to the address for which the write request is generated if the access is prohibited.SELECTED DRAWING: Figure 1 |
