66AK2G12: Max value of Forwarding time for EtherCAT

Hiroyasu Tazawa1

Guru 12350 points

Part Number: 66AK2G12

Hi,

Let me talk about 66AK2G12 for EtherCAT.

I posted this thread.

e2e.ti.com/.../658586

So We got forwarding latency(360ns) from this.
Is this parameter Max value ?
If no, Please let me know Max Value.

Because my customer define Max Value for their products.

Best Regards
Hiroyasu

over 8 years ago

0 Garrett Ding over 8 years ago

TI__Mastermind 43296 points

Hiroyasu,

Yes, the customer can set the 360ns as Max Value.

Regards,
Garrett

0 Hiroyasu Tazawa1 over 8 years ago in reply to Garrett Ding

Guru 12350 points

Hi, Garrett

Thank you for your reply !

Could you tell me how much typ value?

Best Regards
Hiroyasu

0 Garrett Ding over 8 years ago in reply to Hiroyasu Tazawa1

TI__Mastermind 43296 points

Hiroyasu,

EtherCAT frames are cut-through in PRU-ICSS with a "fixed" latency (360ns) compared to RX.

I will try to find a ICE board and measure if any jitter from PHY/system. The worst case that you might suggest customer to add 50ns more for the latency.

Regards,

Garrett

0 Hiroyasu Tazawa1 over 8 years ago in reply to Garrett Ding

Guru 12350 points

Hi, Garrett

Thank you for your reply !
I got it.

Best Regards
Hiroyasu

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66AK2G12: Max value of Forwarding time for EtherCAT