4.13.4.2 WAKE_OUT Pin Wake Forwarding
The WAKE_OUT pin may be configured to assert high for 90 µs upon wake from SLEEP due to MDI activity or a wake pulse on WAKE_IN. Enabling of WAKE_OUT pin forwarding is accomplished by setting the WAKE_OUT Forward Enable (WKOFWDEN) bit of the Sleep Control 1 (SLPCTL1) register prior to entering the SLEEP state. Automatic forwarding of wake events to the WAKE_OUT pin must be configured prior to entering the SLEEP state.
Tip: The WAKE_OUT pin is shared with RXCLK on the LAN8670 and can
be used only if the device is configured for RMII operation.
Important: The WAKE_OUT pin
operates from the VDDP power domain and therefore will only be asserted once the external
VDDP supply has been powered.