AN5757S Overview
MICROCONTROLLERS Aug 10, 2001 App Note 101: Using the Secure Microcontroller Watchdog Timer The Secure Microcontroller Family (DS5000FP, DS5001FP, DS5002FP, and associated modules) integrate an internal watchdog timer to prevent code execution errors. The watchdog timer uses the high precision crystal oscillator that is also used by the microcontroller.