Window Mode; Basic Wdt Settings - Infineon XMC7000 Series Using Manual

Using the Watchdog Timer in XMC7000 family MCUs
Basic WDT
The example shows the following three scenarios:
Service the basic WDT counter before it reaches the WARN_LIMIT.
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Service the basic WDT counter within the pre-warning ISR.
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If the basic WDT counter is not serviced in time, a RESET is issued after 1 second.
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2.6

Window mode

XMC7000 MCUs support the option to define a lower counter threshold that allows a WDT window mode. WDT
window mode supports the observation of two counter limits: a lower limit and an upper limit. If the watchdog
is serviced before the counter has reached the configured lower limit value in the LOWER_LIMIT register, a reset
is issued. If the watchdog is not serviced before the upper limit of the basic WDT counter is reached, a reset is
issued. The two limits define the window timing within which the basic watchdog timer must be serviced. To
enable this function, the LOWER_ACTION[0] bit in the CONFIG register must be set to '1', and an adequate lower
limit period must be defined in the LOWER_LIMIT register.
The following example calculates the LOWER_LIMIT of 150 ms:
����������_���������� = 32.768 ������ × 150 ���� = 4915 = 0��00000������
2.7

Basic WDT settings

This section describes how to configure the WDT based on a use case using the ModusToolbox™ CAT1
Peripheral Driver Library provided by Infineon. The code snippets in this application note are part of the
ModusToolbox™ CAT1 Peripheral Driver Library. See
ModusToolbox™ CAT1 Peripheral Driver Library has a configuration part and a driver part. The configuration
part configures the parameter values for the desired operation.
Application Note
Other references.
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2022-05-25