SNLA417 January 2023 DP83TC812R-Q1 , DP83TC812S-Q1
Another TC10 test keeps the LP2 PHY bootstrapped to master mode. Specifically, LP2 immediately wakes up as master and LP1 wakes up as a slave.
To prevent link up before the MAC interfaces are ready to communicate, the PHYs can be bootstrapped in managed operation. In managed operation, commands through MDIO allow the PHY to exit standby mode and enable both the PCS and PMA so the devices can successfully link. Using this test, T7 and T8 are also ignored entirely, allowing for link training to begin from configuring a single register by MDIO.