AM3357: Internal PU/PD setting for MII

Ryuuichi machida

Part Number: AM3357

Tool/software:

Hi,

I would like you to confirm about below.

* When we use MII interface with emac, is there any specific internal pull up/pull down setting for each pins ?

BR,

2 days ago

0 Kallikuppa Sreenivasa 1 day ago

TI__Guru**** 156089 points

Hello Ryuuichi machida

Thank you.

For the MAC interface operation, i do not see the need for any pulls.

When the MAC interfaces to a EPHY, the need for parallel termination is EPHY dependent.

Regards,

Sreenivasa

0 Ryuuichi machida 1 day ago in reply to Kallikuppa Sreenivasa

Guru 11820 points

Hi Sreenivasa,

Thank you for your reply.

>For the MAC interface operation, i do not see the need for any pulls.
I could not undertand above case. Which case will be applied above ?

>When the MAC interfaces to a EPHY, the need for parallel termination is EPHY dependent.
Do you mean that we should perform same setting as Ethernet PHY ?

BR,

0 Kallikuppa Sreenivasa 1 day ago in reply to Ryuuichi machida

TI__Guru**** 156089 points

Hello Ryuuichi machida

Ryuuichi machida said:
For the MAC interface operation, i do not see the need for any pulls.
I could not undertand above case. Which case will be applied above ?

The MAC interface pulls have EPHY dependency.

The idea is to ensure processor IOs or the attached device IOs do not float.

Regards,

Sreenivasa

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AM3357: Internal PU/PD setting for MII