# Ethernet features

Tab QCS6490
Tab QCS9075
Tab QCS8275

- *class* tabincludedirective

    - ## Energy efficient Ethernet

EEE is an optional operational mode that helps in reducing the
consumption of power while transmitting and receiving data. When there
is no data to transmit or receive, this feature allows the MAC sublayer
and a family of physical layers (PHY) to operate in the low-power idle
(LPI) mode.

During link negotiation, the link partners learn about the capabilities
and features, such as EEE, supported by the remote entity. Based on the
supported capabilities, features, and data transfer state, the MAC
determines whether the system should enter or exit the LPI mode and
communicates this information to the PHY.

The EEE feature specifies the capabilities and negotiation methods that
the link partners can use to:

- Determine whether EEE is supported.
- Select the set of parameters that are common to both the devices.

Note

EEE feature is supported only on QEP8121 PHY.

## Next steps

> 
> 
> - [Bring up Ethernet](https://docs.qualcomm.com/doc/80-70018-26/topic/bring_up-ethernet.html#bring-up-ethernet)
> - [Configure energy efficient Ethernet](https://docs.qualcomm.com/doc/80-70018-26/topic/configure-ethernet-features.html#configure-eee)

- *class* tabincludedirective

    - Basic Ethernet features such as interface enumeration and data path are supported on QCS9075.

- *class* tabincludedirective

    - Basic Ethernet features such as interface enumeration and data path are supported on QCS8275.

Last Published: Apr 10, 2025

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