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Two RMII interface on i.MX6 Solo

Question asked by Erich Wolf on Feb 15, 2016
Latest reply on Feb 17, 2016 by Erich Wolf

Hi all,


we want to connect two external PHY (LAN8720A) on i.MX6 Solo (RMII interface).


Refer to

i.MX 6SoloX Applications Processor Reference Manual, Rev. 0, 2/2015

24.3 External Signals, the table describes the external signals of ENET1 and  ENET2.


I match the ENET1 signals:


ENET1_MDC                                 =             RMII_MDC

ENET1_MDIO                                =            RMII_MDIO

ENET1_RX_DATA0                       =            RMII_RX_DATA0

ENET1_RX_DATA1                       =            RMII_RX_DATA1

ENET1_TX_DATA0                       =            RMII_TX_DATA0

ENET1_TX_DATA1                       =            RMII_TX_DATA1

ENET1_RX_ER                            =            RMII_RX_ER


ENET1_RX_EN                           =             RMII_CRS_DV


ENET1_REF_CLK1                    =             RMII_25MHz_PHY_CLK


Is that correct?


Is the signal ENET1_REF_CLK1 in the right power domain?


Could I use the ENET1_REF_CLK1 to clock the PHY?




I found in the table a signal "ENET1_REF_CLK_25MHz",

but there is no Mode given (" - ").



Could you please let me know - what does it mean?