ZHCSEC3D October 2015 – November 2022 DP83867CS , DP83867E , DP83867IS
PRODUCTION DATA
MII Loopback is the shallowest loop through the PHY. It is a useful test mode to validate communications between the MAC and the PHY. While in MII Loopback mode the data is looped back, and can also be configured through register to transmit onto the media.