4.13.4.1 MDI Wake Forwarding

This section applies to devices of revision C2 and earlier.

The LAN8670/1/2 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.

MDI wake activity forwarding is enabled 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.

Important: This MDI wake signaling does not meet the OPEN Alliance 10BASE-T1S Sleep/Wake‑up Specification, version 1.0. For a compliant signal, use Revision D0 or later.