Abstract: A controller includes: a main processing unit that executes a program; and a monitoring unit that monitors a signal, output from the main processing unit, to reset the main processing unit when detecting an abnormality in the main processing unit. The main processing unit includes: a detection unit that resets the main processing unit when detecting an incorrect access of another program to a protection target region of the program; a first testing unit that intentionally executes the incorrect access to the protection target region to test whether the main processing unit is reset by the detection unit; and a second testing unit that intentionally outputs a signal indicating an abnormal state to the monitoring unit to test whether the main processing unit is reset by the monitoring unit. When detecting the incorrect access, the detection unit causes the second testing unit to intentionally output the signal.

Abstract: A control device according to an embodiment includes a driving unit that supplies, to a control target, a current or a voltage on which an Alternating-Current (AC) component is superimposed, an Analog-to-Digital (AD) converter, and an AD conversion controller. The AD conversion controller causes, in an AC cycle of the AC component, the AD converter to execute a first AD conversion in synchronization with a starting timing of the AC cycle, and then to execute second and subsequent AD conversions at predetermined time intervals in response to a trigger by an internal timer of the AD converter.

Abstract: An electronic control device according to an embodiment of the present invention includes an arithmetic device such as a microcomputer having a watchdog timer circuit, and a runaway monitoring circuit which monitors the arithmetic device for an operational failure by receiving a pulse output from the arithmetic device, in which the watchdog timer circuit or the runaway monitoring circuit detects occurrence of a failure of the arithmetic device according to the state (high level or low level) of an indication signal (wakeup signal) which shows the operational state of the arithmetic device.

Abstract: An electronic control device according to an embodiment of the present invention includes an arithmetic device such as a microcomputer having a watchdog timer circuit, and a runaway monitoring circuit which monitors the arithmetic device for an operational failure by receiving a pulse output from the arithmetic device, in which the watchdog timer circuit or the runaway monitoring circuit detects occurrence of a failure of the arithmetic device according to the state (high level or low level) of an indication signal (wakeup signal) which shows the operational state of the arithmetic device.