Stratix® 10 Hard Processor System Technical Reference Manual

ID 683222
Date 8/15/2024
Public
Document Table of Contents

17.6.6. IEEE 802.3az Energy Efficient Ethernet

Energy Efficient Ethernet (EEE) standardized by IEEE 802.3‑az, version D2.0 is supported by the EMAC. It is supported by the MAC operating in 10/100/1000 Mbps rates. EEE is only supported when the EMAC is configured to operate with the RGMII PHY interface operating in full-duplex mode. It cannot be used in half-duplex mode.

EEE enables the MAC to operate in Low-Power Idle (LPI) mode. Either end point of an Ethernet link can disable functionality to save power during periods of low link utilization. The MAC controls whether the system should enter or exit LPI mode and communicates this information to the PHY.