AM6442: sysconfig: RGMII and EtherCAT pins confliction

Shine

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

over 3 years ago

0 Nick Saulnier over 3 years ago

TI__Guru** 104540 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 xiansheng xiao over 3 years ago

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 Nick Saulnier over 3 years ago in reply to xiansheng xiao

TI__Guru** 104540 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

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AM6442: sysconfig: RGMII and EtherCAT pins confliction