AM625: HW Layout Questions

Hello Kevin,

Thank you for the query.

I answered to my best. 

Kevin Peng said:

1: The current RMII_TXC pin is connected to the CRS_DV pin of the EVM's PHY chip. If we directly connect it to the TXC pin of the PHY chip, what changes are needed on the AM6234 side?

I am not sure i understand the query.

The EVM has RGMII connection, i assume you are considering the RMII connection.

Please follow the connection as per the pin description for RMII

Table 6-4. CPSW3G0 RMII1 Signal Descriptions

Table 6-5. CPSW3G0 RMII2 Signal Descriptions

Can you draw a block diagram on the planned connections and share.

Kevin Peng said:

2: Will the lack of CRS_DV network have an impact?

Refer below. I suspect you have to connect all the signals as per the RMII interface requirements. 

https://www.ti.com/lit/an/snla076a/snla076a.pdf

Kevin Peng said:

3: Since the AM62's CRS_DV and RGMII_TXC are shared, can RGMII_TXC be connected to the RMII_TXC network?

I am not sure i understand the statement.

The IOs get configured for the specified function based on the interface configured.

Regards,

Sreenivasa

Hello Kevin,

When using a specific interface protocol, the recommendations is always to connect the signals as per the protocol recommendations.

Regards,

Sreenivasa