imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

[anson]

I'm Using Boundary Nitrogen6X Development board.

ENET connection is shown as below:

Physical  <==>  MII  <==>  MAC

KSZ9021RN is used in the design.

In the development board, RGMII_TD and RGMII_RD pins are connected to KSZ9021RN as data transfer pins.

BTW, ENET_RX_DATA & ENET_TX_DATA pins remains unused. What is the purpose of ENET_RX_DATA & ENET_TX_DATA in the ENET module?

Regards,

Anson

[Yuri · Accepted solution]

There are different pin sets for MII / RMII and RGMII. Please take a look at Table 23-1 (ENET External Signals)
of the i.MX6 DQ Reference Manual.

Have a great day,
Yuri

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[anson]

Hi Yuri,

Does it mean ENET_RX_DATA & ENET_TX_DATA is used in MII or RMII mode, thus they are useless in RGMII mode?

[sinanakman]

e.g. we use MX6Q_PAD_ENET_RX_ER as SPDIF input  :smileywink:

[Yuri]

Yes, signals, that are not used for RGMII (say, ENET_RXD0), may be configured for other functionality.