SNLA293 May 2022 DP83TC811R-Q1 , DP83TC811S-Q1
Start of measurement:
For the IOP tests measuring link-up time either after power-up or after hardware reset, it is important to start the measurement of link-up time after the initialization configuration is loaded back into DP83TC811. As the configuration is loaded into the PHY by a controller, we recommend the controller to give an indication (a software bit or an IO state) after the last configuration register is written. This indicator going high is the start of measurement of link-up time.
Status to be poled:
Link-status is indicated by bit 14 of register 0x0133: 1 = link-up; 0 = link-down. This should be poled to indicate the event of link-up or link-down during these tests.