20.2.6.3.2 PO_RESET_RCOSC_N
The PO_RESET_RCOSC_N is a synchronized version of the PO_RESET_N signal on CLK_RCOSC. It asserts asynchronously and negates synchronously to CLK_RCOSC.
This is a power-on reset signal to the Watchdog Timer.
Important: The watchdog timer counter is reset by POR only and is
not effected by WDOG_RESET_N.