ZHCSDE3G February 2015 – October 2022 DP83867CR , DP83867IR
PRODUCTION DATA
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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.