M451LG6AE Datasheet, PDF (172/219 Pages) List of Unclassifed Manufacturers – 32-bit Microcontroller

M451
6.10 Watchdog Timer (WDT)
6.10.1 Overview
The purpose of Watchdog Timer (WDT) is to perform a system reset when system runs into an
unknown state. This prevents system from hanging for an infinite period of time. Besides, this
Watchdog Timer supports the function to wake-up system from Idle/Power-down mode.
6.10.2 Features
 18-bit free running up counter for WDT time-out interval
 Selectable time-out interval (2⁴ ~ 2¹⁸) and the time-out interval is 1.6 ms ~ 26.214s if
WDT_CLK = 10 kHz.
 System kept in reset state for a period of (1 / WDT_CLK) * 63
 Supports selectable WDT reset delay period, including 1026、130、18 or 3 WDT_CLK reset
delay period
 Supports to force WDT enabled after chip powered on or reset by setting CWDTEN[2:0] in
Config0 register
 Supports WDT time-out wake-up function only if WDT clock source is selected as LIRC or
LXT.
Mar. 04, 2016
Page 172 of 219
Rev.2.05