Microcontroller, control device and determination method

摘要

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.

主权项

1. A microcontroller comprising:
a central processing unit; a PWM signal generation unit which generates a PWM signal according to a stored generation condition set by the central processing unit, the stored generation condition being stored in a register; and a diagnostic unit which detects a pulse period and a pulse width of the PWM signal generated by the PWM signal generation unit and compares the detected pulse period and pulse width with a pulse period and pulse width corresponding to the stored generation condition to thereby perform a diagnosis of the PWM signal generation unit, wherein when the stored generation condition under which the pulse width of the PWM signal becomes zero is set to the PWM signal generation unit, the diagnostic unit corrects an input PWM signal to be a high level only for a first period shorter than the pulse period for the set stored generation condition and detects a pulse period and a pulse width of the corrected PWM signal to thereby perform the comparison.