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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
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6.10 Watchdog Timer (WDT)
6.10.1 Overview
The purpose of Watchdog Timer 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 Watchdog Timer time-out interval.
Selectable time-out interval (2
4
~ 2
18
) WDT_CLK cycle and the time-out interval period
is 104 ms ~ 26.3168 s if WDT_CLK = 10 kHz.
System kept in reset state for a period of (1 / WDT_CLK) * 63
Supports Watchdog Timer reset delay period
-
Selectable it includes (1026
、
130
、
18 or 3) * WDT_CLK reset delay period.
Supports to force Watchdog Timer enabled after chip powered on or reset while
CWDTEN (CONFIG0[31] Watchdog Enable) bit is set to 0.
Supports Watchdog Timer time-out wake-up function only if WDT clock source is
selected as 10 kHz