M0519 Datasheet, PDF (45/69 Pages) List of Unclassifed Manufacturers – 32-bit Microcontroller

M0519
6.11 Window Watchdog Timer (WWDT)
6.11.1 Overview
The Window Watchdog Timer is used to perform a system reset within a specified window period to
prevent software from running to uncontrollable state by any unpredictable condition usually generated
by external interferences or unexpected logical conditions.
When the window function is used to trim the watchdog behavior to match the application perfectly,
software must refresh the counter before time-out.
6.11.2 Features
 6-bit down counter value WWDTCVAL (WWDTCVR[5:0]) and 6-bit compare value WINCMP
(WWDTCR[21:16]) to make the WWDT time-out window period flexible
 Supports 4-bit value PERIODSEL (WWDTCR[11:8]) to programmable maximum 11-bit
prescale counter period of WWDT counter
 WWDT counter suspends in Idle/Power-down mode
Nov. 02, 2016
Page 45 of 69
Rev 1.02