DP83825I: Can't Link Up

Hi Hiroshi,

For my understanding, you are stating that if the PHY is disabling Auto-negotiation and Auto-MDIX, it is getting linkup, but while these are being set, the PHY is not achieving linkup?

What is the link partner? Is it too in auto-negotiation and auto-MDIX enable, or is it disabling too?

Sincerely,

Gerome

Hi Gerome-san,

Both Auto-Negotiation and Auto-MDIX of the router are enabled.
The routers used by our customers are listed below.

Both Auto-Negotiation and Auto-MDIX of the router are enabled.
The routers used by our customers are listed below.

Supplier: I-ODATA
Model: ETG3-R
Gigabit compatible wired LAN router
https://www.iodata.jp/product/lan/router/etg3-r/spec.htm

Supplier: I-ODATA
Model: ETG3-R
Gigabit compatible wired LAN router
www.iodata.jp/.../spec.htm

If you need any other information, please let us know.
We will confirm with the customer again.

Best regards,
Hiroshi

Hi Hiroshi-san,

Can you please provide a register dump of the PHY (Reg 0x0-1F, 0x467) when in the two states mentioned; auto-neg/mdix enabled (with no link), and forced configuration (with link)?

Is this behavior present on all link partners (laptop, other Ethernet ports, even to another instance of the design)?

Sincerely,

Gerome

Hi Gerome-san,

Thank you for your support.
I will notify you once I receive information from my customer.

Best regards,
Hiroshi

Hi Hiroshi-san,

Thank you for the update. I will look forward to further news.

Sincerely,

Gerome

Hi Gerome-san,

I have received register information from our customer.
Sorry to trouble you, but I would appreciate it if you could give me some advice.

==================================================
 Register contents of PHY (Reg 0x0-1F, 0x467).

①Registers when A-MDIX and ANeg_Dis are disabled in Straps Configuration
②Registers when A-MDIX and ANeg_Dis are enabled in Straps Configuration
① and ② are the states after starting up and setting the IP address.
(Not connected to router)

Additionally, after connecting to the router in state ②, we will also send you the register contents when the link is successful and when it fails.
③Enable A-MDIX and ANeg_Dis, register when link is successful
④ Enable A-MDIX and ANeg_Dis, register when link fails

This situation also occurs at end customers.
Unfortunately, I don't know the details of the connection partner.
==================================================

Reg <00> = 0x3100
Reg <01> = 0x7849
Reg <02> = 0x2000
Reg <03> = 0xA140
Reg <04> = 0x05E1
Reg <05> = 0x0000
Reg <06> = 0x0004
Reg <07> = 0x2001
Reg <08> = 0x0000
Reg <09> = 0x0000
Reg <0a> = 0x0100
Reg <0b> = 0x0000
Reg <0c> = 0x0000
Reg <0d> = 0x401F
Reg <0e> = 0x1000
Reg <0f> = 0x0000
Reg <10> = 0x0002
Reg <11> = 0x0108
Reg <12> = 0x0000
Reg <13> = 0x0000
Reg <14> = 0x0000
Reg <15> = 0x0000
Reg <16> = 0x0100
Reg <17> = 0x00E1
Reg <18> = 0x0400
Reg <19> = 0x0000
Reg <1a> = 0x0000
Reg <1b> = 0x007D
Reg <1c> = 0x05EE
Reg <1d> = 0x0000
Reg <1e> = 0x0102
Reg <1f> = 0x0000
Reg <0467> = 0x043A

Reg <00> = 0x3100
Reg <01> = 0x7849
Reg <02> = 0x2000
Reg <03> = 0xA140
Reg <04> = 0x05E1
Reg <05> = 0x0000
Reg <06> = 0x0004
Reg <07> = 0x2001
Reg <08> = 0x0000
Reg <09> = 0x0000
Reg <0a> = 0x0100
Reg <0b> = 0x0000
Reg <0c> = 0x0000
Reg <0d> = 0x401F
Reg <0e> = 0x1000
Reg <0f> = 0x0000
Reg <10> = 0x0002
Reg <11> = 0x0108
Reg <12> = 0x0000
Reg <13> = 0x0800
Reg <14> = 0x0000
Reg <15> = 0x0000
Reg <16> = 0x0100
Reg <17> = 0x00E1
Reg <18> = 0x0480
Reg <19> = 0x8000
Reg <1a> = 0x0000
Reg <1b> = 0x007D
Reg <1c> = 0x05EE
Reg <1d> = 0x0000
Reg <1e> = 0x0102
Reg <1f> = 0x0000
Reg <0467> = 0x053B

Reg <00> = 0x3100
Reg <01> = 0x786D
Reg <02> = 0x2000
Reg <03> = 0xA140
Reg <04> = 0x05E1
Reg <05> = 0xC1E1
Reg <06> = 0x000F
Reg <07> = 0x2001
Reg <08> = 0x0000
Reg <09> = 0x0000
Reg <0a> = 0x0100
Reg <0b> = 0x0000
Reg <0c> = 0x0000
Reg <0d> = 0x401F
Reg <0e> = 0x053B
Reg <0f> = 0x0000
Reg <10> = 0x4015
Reg <11> = 0x0108
Reg <12> = 0x6400
Reg <13> = 0x2800
Reg <14> = 0x0000
Reg <15> = 0x0000
Reg <16> = 0x0100
Reg <17> = 0x00E1
Reg <18> = 0x0480
Reg <19> = 0x8C00
Reg <1a> = 0x0000
Reg <1b> = 0x007D
Reg <1c> = 0x05EE
Reg <1d> = 0x0000
Reg <1e> = 0x0102
Reg <1f> = 0x0000
Reg <0467> = 0x053B

Reg <00> = 0x3100
Reg <01> = 0x7849
Reg <02> = 0x2000
Reg <03> = 0xA140
Reg <04> = 0x05E1
Reg <05> = 0x0000
Reg <06> = 0x0005
Reg <07> = 0x2001
Reg <08> = 0x0000
Reg <09> = 0x0000
Reg <0a> = 0x0100
Reg <0b> = 0x0000
Reg <0c> = 0x0000
Reg <0d> = 0x401F
Reg <0e> = 0x053B
Reg <0f> = 0x0000
Reg <10> = 0x0002
Reg <11> = 0x0108
Reg <12> = 0x0000
Reg <13> = 0x0000
Reg <14> = 0x0000
Reg <15> = 0x0000
Reg <16> = 0x0100
Reg <17> = 0x00E1
Reg <18> = 0x0480
Reg <19> = 0x8000
Reg <1a> = 0x0000
Reg <1b> = 0x007D
Reg <1c> = 0x05EE
Reg <1d> = 0x0000
Reg <1e> = 0x0102
Reg <1f> = 0x0000
Reg <0467> = 0x053B

Best regards,
Hiroshi

Hi Hiroshi-san,

Unfortunately, I need more information about the differences between items 3 and 4 to move forward. It appears the settings between these two dumps (Reg 0x0,0x4) are the same, so the DUTs are configured the same. 

Sincerely,
Gerome