DP83867IRPAP-EVM: DP83867IRPAPR

Hi User,

Apologies but I don't believe I understand the issue.

user6350528 said:

The chip should be in normal communication, unplug the network cable, and then plug in the network cable, to be able to communicate, do not need to power on

What does not need to power on? Do we have good link when the network cable is connected?

user6350528 said:

We encountered a problem is: unplug the network cable, and then plug it in, you can not communicate, if after the power failure, and then power on, and can normal communication, this kind of problem to help see what is going on

What is the power failure?

Regards,

Alvaro

Under normal circumstances, after the network cable is removed, it can still communicate normally after being plugged in；
The problem we have now is that after the network cable is removed, and then plugged in, it can no longer communicate，Once the power is unplugged, and then rebooted, he can restore communication

Hi User,

Thank you for clarifying, I understand the issue now. To test this out, I went into lab with the DP83867ERGZ-R-EVM to recreate this issue (I did not have a PAP version to test, but the results should still apply).

With the 867EVM on and running, I was able to link up as expected. Next, after link is up, I ran the script you provided. Immediately the 867 lost link. One by one I went through these registers and found the issue with Reg 0x31 = 0x0. This register write would consistently drop link for me, specifically bit[0] PORT_MIRROR_EN. 

1. Could you try toggling this bit to '1' to see if it affects your board
   
   1. Our EVM uses Mirror mode. 

begin

001F 4000
0000 1140
0004 0DE1
0009 0B00
0010 5008
0032 00D3
0086 0077
0031 0000
01D5 F508
0018 0110

end

Regards,

Alvaro