Renesas Electronics Corporation

Kazuyoshi Fukuda

Nobuyasu Kanekawa

Hiromichi Yamada

Kesami Hagiwara

Yuichi Ishiguro

Takashi Yasumasu

Tsutomu Yamada

Teruaki Sakata

Yoshiyuki Nakada

A microcontroller includes a central processing unit, a PWM signal generation unit which generates a PWM signal according to a generation condition of a PWM signal set by the central processing unit, and a diagnostic unit which inputs the generated PWM signal therein and detects a pulse period and a pulse width, based on the input signal and which determines whether the detected pulse period and pulse width respectively coincide with a pulse period and a pulse width corresponding to the generation condition.

Microcontroller, control device and determination method

To have a problem of occurrence of the same failure in failure detection of a microcontroller. A microcontroller has a CPU and a data access control circuit. The data access control circuit performs two types of accesses: an individual access in which a data access of the CPU is performed for each thread, and a shared access in which a data access of the CPU is performed by executing two threads. The data access control circuit detects a failure of the CPU by making a comparison between the command and the address, respectively, in the shared access generated by executing the two threads.

Semiconductor integrated circuit device and microcontroller

Growing community of inventors

Kanagawa, Japan

Kazuyoshi Fukuda