How to connect to the MII interface on the RT105x?

[deega_jung]

Hello,

Could you advice for me that the MII interface on the RT105x?

1. RT105x EV-KIT is connected by Ethernet PHY and RMII, but is it possible to connect by MII?

If possible, is there a proper reference schematic?

2. Is there any problem using ENET_RX_EN (GPIO_B1_11) pin as RX_DV?

3. When MII interface and JTAG Pin are shared, is there any problem with the operation?

If there is a problem, what should I pay attention to?

Thanks,

Deega

[victorjimenez · Accepted solution]

Hello Deega, 

1. RT105x EV-KIT is connected by Ethernet PHY and RMII, but is it possible to connect by MII?

It's not possible to achieve this with the EVK. If you want to use MII, you'll have to do your own board. Unfortunately, we don't have a reference design for this part. 

2. Is there any problem using ENET_RX_EN (GPIO_B1_11) pin as RX_DV?

Signal ENET_RX_EN can be used as MII_RXDV. Keep in mind that ENET_RX_EN is available through the following paths only. 

3. When MII interface and JTAG Pin are shared, is there any problem with the operation?

Yes. You have to use one path per functionality. It's not possible to configure one path with more than one function. 

Regards,
Victor 

[deega_jung]

Hello Victor ,

Thank you for your reply.

Thanks,

Deega