DP83869HM: Not able to ping

Hi Nagesh,

Are you able to share a schematic for review? This will help me better understand your issue.

Kind Regards,

Joe

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

Hi Nagesh,

There haven't been any posts in a week. Are you still experiencing this issue?

Kind Regards,

Joe

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

Hi Joe,

Issue is still there. The schematic and other related information is available with previous related thread. I am also sharing schematic again here for reference.

Regards,

Nagesh7635.DP_Schematic_forTI.pdf

Hi Nagesh,

1. Can you kindly confirm again that the register writes set the PHY for 100M media converter mode?
   1. Write Register 0x01F=0x4000 //soft reset
   2. Write Register 0x01DF=0x0045 //set 100M media converter mode
   3. Write Register 0x0=0x1140 //set auto-negotiation 
   4. Write Register 0x0010=0x5048 //set auto-MDIX
   5. Write Register 0x01F=0x4000 //soft reset
2. For the copper MDI, the RJ45 and magnetics schematic is not included. Could you please provide this schematic?
3. It seems the straps are not latched correctly. are there any connections on the strap pins that could cause contentions for strap voltages?

Kind Regards,

Joe

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

Hi Joe,

I got inputs from HW team for some of your questions I think. I am attaching schematic also. Here are some questions.

Our query is, strapping is the only mode of configuration ? Cannot we put this device into 100Mbps mode using SW configuration ? Is there any limitation of the device ? Please suggest..

Currently we have connected all the 4 Pairs, should we connect only 2 pair for the 100Mbps ? 

TI_Review_Schematics_01.pdf

With Regards,

Nagesh

Hi Nagesh,

Strapping is not the only mode of configuration. I suggest you reference section 9.4.8.5 100M Media Convertor Mode to configure the device for 100Mbps mode via register access (SW).

After configuring register 0x01DF for your specific MDI, perform the following operations.

• Write 0x1140 to register 0x0000

• Write 0x5048 to register 0x0010

As far as the 4 pairs, two of the pairs will be unused but will not impact your design when operating in 100Mbps mode.

Kind Regards,

Joe

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