4.13.4.1 MDI Wake Forwarding
The device may be configured to generate activity signaling on the MDI upon wake from SLEEP due to a wake pulse on WAKE_IN. The wake signaling consists of a 1 ms transmission of differential Manchester encoded pseudo-random binary data. The device will not listen for activity on the network prior to transmitting the wake signaling.
Enabling of MDI wake activity forwarding is accomplished by setting the MDI Forward Enable (MDIFWDEN) bit of the Sleep Control 1 (SLPCTL1) register. Automatic forwarding of WAKE_IN wake events to the MDI must be configured prior to entering the SLEEP state.
Note: MDI wake signaling was not designed to meet the OPEN Alliance
10BASE-T1S Sleep/Wake-up Specification, version 1.0.