DP83TC811S-Q1: Abnormal communication

Hi Neal,

Can you read registers 0x0, 0x1, 0x12, 0x13, and 0x459 after the failure occurs? When you say the 100Base-T1 interface was abnormally interrupted, does this mean packets were dropped? Is the link still up or is it down?

Thanks,

Lucas

All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

Hi Lucas,

I've met the same problem, too(in module with Qualcomm mdm9628 + DP83TC811S-Q1).

When this failure occurs, connection between devices were down, and I cannot read any registers, acctually I just realized this problem when I'm tring to read a register in a disconnection case. 

Hi

Hi Neal and Yanfeng,

We're looking into this and will get back to you by Tuesday.

Thanks,

Lucas

All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).

Hi Neal and Yanfeng,

It's difficult to debug the issue if it isn't repeatable. If the failure does happen again, can you monitor RX_CLK, CLKOUT, and the MDI pairs? Since the link is going down, there should be auto-negotiation link pulses on the MDI pairs.

Thanks,

Lucas

All information in this correspondence and in any related correspondence is provided “as is” and “with all faults”, and it is subject to TI’s Important Notice (http://www.ti.com/corp/docs/legal/important-notice.shtml).