DP83TD510E-EVM: Hardware setting

Hi Ryuuichi,

Yes, to confirm the ping test, simply connecting a PC to each RJ45 port of the DP83TD510E-EVMs and the Single-Pair-Ethernet cable between the two EVMs is the easiest way to establish link. Please ensure LED_0 is strapped to '0' on the DP83TD510E EVM and that you use the attached script to program each DP83TD510E to link through auto-negotiation.

Regards,

Justin 

begin
001f 8000 //hard reset
0608 003b //disable_0_transition
0862 39f8 //AGC Gain during Autoneg
081a 67c0 //deq offset for 1V swing
081c fb62 //deq offset for 2.4V swing
0830 05a3 //Enable energy lost fallback
0855 1b55 //MSE Threshold change
0831 0403 //energy detect threshold
0856 1800 //good1 MSE threshold change
0857 8fa0 //Enable fallback to phase 1 on watchdog trigger
0871 000c //TED input changed to slicer_in without FFE
0883 022e //Enable Rx Filter, Change PGA threshold for Short Cable detection
0402 1800 //Adjusr LD swing
0878 2248 //Change PI up/down polarity
010c 0008 //tx filter coefficient
0112 1212 //tx filter scaling factor
0809 5c80 //AGC retrain
0803 1529 //Master Ph1 Back-off
0804 1a33 //Master Ph1 Back-off
0805 1f3d //Master Ph1 Back-off
0850 045b //hybrid gain & delay
0874 6967 //kp step 0 for master
0852 7800 //FAGC init gain
0806 1e1e //Master/Slave Ph2 Back-off
0807 2525 //Master/Slave Ph2 Back-off
0808 2c2c //Master/Slave Ph2 Back-off
0850 0590 //Hybrid Gain/Delay Code
0827 4000 //Echo Fixed Delay
0849 0fe4 //Hybrid Cal enable
084b 04b5 //Echo Score Sel
001f 4000 //soft reset
end

Hello Justin-san,

Thank you for your reply.

I have quick question about below.

* Is there any recommended cable for SPE ?

In case of general ethernet cable, there is specification like cat4 or cat5 etc. But I'm not familiar with T1 spec yet. So, if you have cable requirement(or recommended cable parts number), could you please tell it to me ?

Best Regards,

Machida 

Hello Justin-san,

I have additional question.

* It seems that attached script file is for MDIO setting of DP83TC510E. Is there no setting for DP83822H ?

Best Regards,

Hi Ryuuichi,

The is not a particular SPE cable recommendation to do the evaluation. Cat 4 and Cat 5 Ethernet cables will work for evaluation and be able to establish link between the two boards. For the longest cable reach we recommend a cable that meets the 802.3cg channel specifications, like the Siemens 6XV1830-5EH10. More information regarding cable reach can be found here: https://www.ti.com/lit/an/sluaaa9/sluaaa9.pdf 

Hello,

Thank you for your reply.

Can you give me comment for below as well ?

>It seems that attached script file is for MDIO setting of DP83TC510E, Is there no setting for DP838322H ? 

BR,

Hello Justin-san,

Thank you for your reply.

>Correct, there is no register settings needed for DP83822 device to be configured for the media converter mode.

I'm sorry, I have following questions about this.

Q1.

I am also checking User's guide of EVM, then it seems that user need to set following register for both DP83822H and DP83TD510.

* Address : 0x0017

Does above mean that anything other than user's guide decription ?

(In case of DP83TC510, there is no description about setting of 0x0017 in attached script as well.)

Q2.

If answer of above is yes, where should I set 0x0017 for DP83TD510 ?

(Before using script ? or after using script ?)

Q3.

If user use hardware strap setting, can user ignore this software setting ?

Best Regards,

Hi Ryuuichi,

The DP83TD510E-EVM will by default, be set the DP83TD510E to RMII Master mode and the DP83822 to RMII Slave mode through hardware bootstraps. There is no need to write additional registers to have the two PHYs working over the MAC interface in these modes. 

If you desired to set DP83TD510E in RMII Slave and DP83822 in RMII Master, the User's Guide provides the hardware changes and register settings needed for that, but it is not required to bring up the EVM.

Regards,
Justin