SNLA411 October 2022 DP83TC812R-Q1 , DP83TC812S-Q1 , DP83TC813R-Q1 , DP83TC813S-Q1
The PHY transitions to Sleep Silent from the Sleep Request state and waits for the line to go silent. If the line goes silent, the PHY transition from Sleep Silent to the Sleep state. In case the PHY doesn’t go silent before sleep_req_timer lapses (16 ms timer initialized when the PHY moved to Sleep Request state).