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Watchdog (Bora)

94 bytes added, 08:41, 9 October 2015
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Default mounting option is depicted in the following figure.
 
[[File:Bora-reset-scheme.png|thumb|center|700px|Watchdog timer default mounting option]]
 
WDI is connected to Zynq's PS_MIO15_500 I/O. This signal is available on Bora connectors as PS_MIO15_500 (J1.133).
==Selecting different configurations==
Since WD_SETx signals are routed externally, WDT configuration can be changed by optional circuitry implemented on the carrier board. Different solutions for the watchdog management can be implemented on the carrier board, depending on system requirements. The easiest circuit consists of additional stronger pull-up/down resistors connected to WD_SETx pins in order to overrule default configuration.   As MAX6373 allows to change the configuration during operation, more complex solutions can be implemented as well.
On request, PS_MIO15_500 can be disconnected from WDI (please contact Sales Department for more details). This configuration provides two independent signals (EX_WDT_REARM and PS_MIO15_500) that allow the implementation of customized solutions on carrier board. For example you may want to use the Zynq's System Watchdog Timer (SWDT) instead of MAX6373 to reset the system through PS_MIO15_500 that can be configured as SWDT reset.
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