The watchdog system includes a software area including a boot loader area and an application area, a shared memory area storing a last watchdog refresh timing, and an external watchdog module, wherein the external watchdog module includes the bootloader area And in response to a refresh request transmitted from one of the application areas, if the transmitted refresh request timing is an open window timing based on the last watchdog refresh timing and the transmitted refresh request timing from the shared memory area, the watchdog. Refresh.
展开▼
