topic imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage in i.MX Processors

imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

anson — Sun, 27 Apr 2014 05:07:48 GMT

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

Re: imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

Yuri — Tue, 29 Apr 2014 08:38:51 GMT

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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Re: imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

anson — Wed, 30 Apr 2014 09:47:50 GMT

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?

Re: imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

Yuri — Wed, 30 Apr 2014 10:02:54 GMT

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

Re: imx6 ENET module ENET_RX_DATA & ENET_TX_DATA usage

sinanakman — Wed, 30 Apr 2014 16:57:25 GMT

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