
ML51/ML54/ML56
Sep. 01, 2020
Page
313
of 719
Rev 2.00
ML
51
/ML
54
/ML
5
6 S
E
RI
E
S
TECHNI
CA
L
RE
F
E
R
E
NC
E
M
A
NU
A
L
ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
Watchdog Timer Reset
6.2.3.4
The WDT is a free running timer with programmable time-out intervals and a dedicated internal clock
source. User can clear the WDT at any time, causing it to restart the counter. When the selected time-
out occurs but no software response taking place for a while, the WDT will reset the system directly
and CPU will begin execution from 0000H.
Once a reset due to WDT occurs, the WDT reset flag WDTRF (WDCON.3) will be set. This bit keeps
unchanged after any reset other than a power-on reset or WDT reset itself. User can clear WDTRF via
software.