AM2434: Support EtherCAT on PRU_ICSSG with RGMII

Motoyasu Hattori

Part Number: AM2434
Other Parts Discussed in Thread: DP83867E

Hi,

Can AM2434 support EtherCAT and Ethernet/IP on PRU_ICSSG with "RGMII only"?

My customer considers AM2434 with DP83867E (RGMII interface) to implement EterCAT and Ethernet/IP. But I hear PRU_ICSS supports EtherCAT with MII, not RGMII. That is why I want to confirm whether "PRU_ICSSG with RGMII only" support EtherCAT and Ethernet/IP. Please support us.

Thanks and best regards,
M.Hattori.

8 months ago

0 PratheeshGangadhar 8 months ago

TI__Guru 50931 points

(+) [FAQ] AM2434: Is TI EtherCAT solution in the Industrial Communications SDK compatible with RGMI ? - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

Summary : EtherCAT SubDevice over RGMII interface is not supported - latency over RGMII is high on the MAC side at 10M/100M and features like odd nibble detection/insertion won't work.

0 Tony Tang 7 days ago in reply to PratheeshGangadhar

TI__Mastermind 30542 points

Hi Pratheesh,

I have some additional questions

#1. For EtherCAT slave, should enable or disable feature like odd nibble detection/insertion?

#2. Are odd nibble detection/insertion feature in MAC, PRU firmware or PHY?

#3. Beside latency is higher with RGMII, from functionality, can AM243x industry SDK EtherCAT slave example work in RGMII mode.

#4. Does PRU firmware care if the interface is MII or RGMII?