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AM6442: sysconfig: RGMII and EtherCAT pins confliction

Shine
Genius 13655 points
Part Number: AM6442
Other Parts Discussed in Thread: SYSCONFIG

Hello Champs,

Customer wanted to configure 2 gigabit ethernet and 2 master Ethercat on AM6442.

But PRU_ICSSG EtherCAT MII pins are conflicted to CPSW3G RGMII pins. please see below snapshot of sysconfig tool.

How to configure to support master 2 gigabit ethernet ports and 2 master Ethercat ports?



Thanks.
Rgds
Shine

  • 0
    TI__Guru* 93355 points

    Hello Shine,

    The AM64x has 6 possible Ethernet ports (2 CPSW, 4 PRUETH), but some of the signals are muxed to the same pins. So only 5 ports can actually be used at the same time. See this thread for more information: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1018412/am6442-ethernet-ports

    Can you use the other ICSSG for the PRU Ethernet ports?

    Regards,

    Nick

  • 0
    Prodigy 120 points

    Hi, it is ok to use ICSSG for the PRU Ethernet ports.

    But is there any problem or conflict to use ICSSG for Giga Ethernet and EtherCAT at the same time?

    Should I use CPSW3G for Giga Ethernet and use ICSSG for EtherCAT separately??

  • 0 in reply to xiansheng xiao
    TI__Guru* 93355 points

    Hello Xiansheng,

    Either of these options should work fine.

    OPTION 1
    CPSW: 2 gigabit Ethernet ports
    ICSSG0 or ICSSG1 (whichever does not have pinmux conflicts with CPSW): 2 EtherCAT ports

    OPTION 2
    ICSSG0 or 1: 2 gigabit Ethernet ports
    The other ICSSG: 2 EtherCAT ports

    Each ICSSG can have up to two Ethernet ports. I believe that we do NOT support using different protocols on the same ICSSG. i.e., I do NOT think we support this usecase: ICSSG0 port 0 = gigabit Ethernet, ICSSG0 port 1 = EtherCAT. I am reassigning the thread to another team member to verify that I am correct.

    Regards,

    Nick