Renesas Electronics Corporation

Fuji Jukogyo Kabushiki Kaisha

Tomohiro Sakurai

Seiji Ikari

Katsuyoshi Watanabe

Mamoru Sakugawa

Takashi Nasu

Tsutomu Kumagai

There is a need to provide a microcomputer capable of eliminating an external terminal for endian selection. Flash memory includes a user boot area for storing a program executed in user boot mode and corresponding endian information and a user area for storing a program executed in user mode and corresponding endian information. A data transfer circuit reads endian information stored in the user boot area or the user area in accordance with operation mode and supplies the endian information to a CPU before reset release of the CPU. Accordingly, an external terminal for endian selection can be eliminated.

Microcomputer having processor capable of changing endian based on endian information in memory

A control apparatus of an electric vehicle in which relays are switched to a disconnecting state without causing failure of the electric vehicle. Main relays RyRyswitchable between a connecting state and a disconnecting state are provided between a drive motorfor driving driven wheels and a motor drive batteryfor supplying current to the drive motorWhen these main relays RyRyare to be switched to the disconnecting state, it is determined whether or not the output current I from the motor drive batteryis below a predetermined current and whether or not the vehicle speed V is below a predetermined speed. When it is determined that the output current I is below the predetermined current and the vehicle speed V is below the predetermined speed, the main relays RyRyare switched to their disconnecting states. By this means it is possible to prevent welding failure of the main relays RyRyand to protect an invertorand high-voltage auxiliariesfrom an induced voltage of the drive motor

Control apparatus of electric vehicle

Growing community of inventors

Tokyo, Japan

Tomohiro Sakurai