M0564LE4AE Datasheet, PDF (132/161 Pages) List of Unclassifed Manufacturers – 32-BIT MICROCONTROLLER

M0564
6.24 Window Watchdog Timer (WWDT)
6.24.1 Overview
The Window Watchdog Timer (WWDT) is used to perform a system reset while WWDT counter is
not reload within a specified window period when application program run to uncontrollable status
by any unpredictable condition.
6.24.2 Features
 Supports 6-bit down counter value CNTDAT (WWDT_CNT[5:0]) and maximum 6-bit
compare value CMPDAT (WWDT_CTL[21:16]) to adjust the WWDT compare time-out
window period flexible
 Supports PSCSEL (WWDT_CTL[11:8]) to programmable maximum 11-bit prescale
counter period of WWDT counter
 WWDT counter suspends in Idle/Power-down mode
 WWDT counter only can be reloaded within in valid window period to prevent system
reset
6.24.3 Clock Control
The WWDT clock control and block diagram are shown as follows.
WWDTSEL (CLK_CLKSEL2[17:16])
WDTCKEN (CLK_APBCLK0[0])
HCLK/2048 ₁₀
10 kHz (LIRC) ₁₁
WWDT_CLK
Figure 6.24-1 WWDT Clock Control
May 05, 2017
Page 132 of 161
Rev 1.00