SNLS614A September 2018 – December 2018 DP83869HM
In this mode, all the digital and analog blocks are powered down. The PHY is automatically powered up when a link partner is detected. This mode is useful for saving power when the link partner is down or inactive, but PHY cannot be powered down. In Active Sleep mode, the PHY still routinely sends NLP to the link partner. This mode can be active by writing binary 10 to bits [9:8] for PHYCR (Register 0x10). Sleep mode cannot be used when Auto-MDIX is on.