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DP83TG721EVM-MC: No connection between Eval-Boards

Dominik Berners
Prodigy 10 points

Part Number: DP83TG721EVM-MC
Other Parts Discussed in Thread: DP83TG720EVM-MC

Hello,

I would like to operate the evaluation board(s) as a media converter. By this I mean that 1000BASE‑T should be used as the input on one side and converted to 1000BASE‑T1 on the other side. Unfortunately, this does not work “out of the box” as expected.

Initially, I had the problem that the second board (I call it “_1” because all labels include this suffix; this is the board with the RJ45 connector) was not being powered until I discovered that resistors R57 and R58 were not populated. The _1 board does have 3V3 connections via connector J11_1 (on the other board J14), but these connections lead nowhere (I do not have the layout, but according to the schematic there is no connection to any other 3V3 nets, and it also does not functionally connect).

LED D2 lights up red when power is applied if R57 is populated. If R57 is populated later (soldered as a jumper), both boards boot up normally.

But back to the unresolved issue:

Everything is now powered and all LEDs are illuminated, except LD1–4 on the first board. These LEDs are supposed to indicate the working link between the first and second board. However, these LEDs only light up if jumpers J5 and J12 are swapped, and only until the connection resets. 

Additional information:
LED D5_1 lights up orange from time to time. The 1000BASE‑T side is connected to a Raspberry Pi (iperf3 server), and the 1000BASE‑T1 side is connected to another evaluation board that also converts back to 1000BASE‑T and is then connected to a router. The other Eval-Board works fine, i tested it with another board.

thank for your help

  • 0
    TI__Genius 14970 points

    Hi Dominik,

    That is correct, R57 and R58 should be populated to power on the second board (DP83867). J12 controls Master/Slave mode selection and J5 controls managed/autonomous mode selection. Depending on the configuration of the EVMs link partner, these will determine whether or not a link can be established. Therefore, certain settings of these jumpers will result in the link indication LED not turning on. Is your link partner configured as master or slave?

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    Prodigy 10 points

    Hi Greg,

    Thank you for your response. The link partner is in slave mode. However, I tested all variants in combination with the ping command and take a look on the LEDs (see table).

    TI DP83TG7 Link Partner Reaction
    Master (autonomous) Slave (auto neg.) LD3 on; LD2 on and blinking sometimes; no connection (ping)
    Slave (autonomous) Master (auto neg.) LD3 on; LD2 on and blinking sometimes; no connection (ping)
    Slave (managed) Master (managed) LD3 off; LD2 off; no connection (ping)
    Master (managed) Slave (managed) LD3 off; LD2 off; no connection (ping)

    OK, the autonomous operation mode has apparently brought some activity to the system. It now seems that data is being exchanged between the PHYs. Unfortunately, a connection between the server and the client is still not being established, as confirmed by a ping test. I also noticed that while the LED on the RJ45 connector is illuminated, it does not indicate any data transfer through short blinking pulses. I cannot measure the 1000BASE-T1 signals jet, at least to verify whether the SPE link is correct.
    Can I assume that if the LD2 is on and occasionally flickers briefly (synchronized with an LED on the link partner), the 1000BASE-T1 connection is okay? How can I proceed to check if the 1000BASE-T connection is working correctly? The server or client works when I plug them directly into the router.
    I look forward to your response.
    Best regards,
    Dominik
  • 0 in reply to Dominik Berners
    TI__Genius 14970 points

    Hi Dominik,

    Can you share a register dump from the PHY? The registers can indicate if the 1000BASE-T1 link is up. When the PHY is in managed mode, it will not be able to link up with its link partner. 

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    Prodigy 10 points

    Hi Greg,

    ok, her ist the hex dump:

    Hex-dump-Skript.txt file is open...
    Register 0000 is: 0140
    Register 0001 is: 0145
    Register 0002 is: 2000
    Register 0003 is: a290
    Register 000F is: 0000
    Register 0010 is: 0605
    Register 0011 is: 000b
    Register 0012 is: 8000
    Register 0013 is: 0000
    Register 0016 is: 0100
    Register 0018 is: 0008
    Register 0019 is: 0400
    Register 001B is: 0000
    Register 001C is: 0001
    Register 001E is: 0000
    Register 001F is: 0000
    Register 0031 is: 0000
    Register 017F is: c026
    Register 0180 is: b5ef
    Register 0184 is: 0023
    Register 0185 is: 0000
    Register 0187 is: 8000
    Register 018B is: 141b
    Register 018C is: 0001
    Register 018E is: c004
    Register 01A0 is: 0000
    Register 0402 is: 6000
    Register 0405 is: 6c00
    Register 0424 is: 0000
    Register 0430 is: 0660
    Register 0440 is: 0000
    Register 0442 is: 0000
    Register 0450 is: 2610
    Register 0451 is: 0008
    Register 0452 is: 0000
    Register 0453 is: 0001
    Register 0455 is: 0000
    Register 0456 is: 0280
    Register 045D is: 2020
    Register 045E is: 0000
    Register 0468 is: 0920
    Register 030F is: 0081
    Register 046A is: 0094
    Register 046B is: b3b3
    Register 046C is: 4141
    Register 046D is: d4d4
    Register 046E is: 5c5c
    Register 046F is: 7c7c
    Register 0470 is: 3636
    Register 0471 is: ecec
    Register 0472 is: a4a4
    Register 0473 is: e8e8
    Register 0474 is: 4444
    Register 0475 is: b2b2
    Register 0476 is: 7a7a
    Register 0477 is: 8080
    Register 0478 is: 5454
    Register 047B is: 0000
    Register 0480 is: 0000
    Register 0482 is: 001c
    Register 050C is: f1f3
    Register 050D is: 002a
    Register 0510 is: 2d50
    Register 0531 is: 0000
    Register 0543 is: 002b
    Register 0544 is: 2927
    Register 0547 is: 0000
    Register 0548 is: 0001
    Register 0549 is: 0001
    Register 054A is: 0000
    Register 054B is: 0000
    Register 0551 is: ffff
    Register 0552 is: 0000
    Register 0553 is: 0000
    Register 056D is: 001e
    Register 056E is: 0000
    Register 0600 is: 0120
    Register 0601 is: 0000
    Register 0602 is: 0000
    Register 0608 is: 027b
    Register 060A is: 0210
    Register 060C is: 001b
    Register 060D is: 0000
    Register 0618 is: 0000
    Register 0619 is: 0574
    Register 061A is: 05dc
    Register 061B is: 007d
    Register 061C is: 0000
    Register 061D is: 0000
    Register 061E is: 0000
    Register 0620 is: 0000
    Register 0622 is: 0000
    Register 0623 is: 0000
    Register 0624 is: 5511
    Register 0625 is: 0000
    Register 0626 is: 0000
    Register 0627 is: 0000
    Register 0628 is: 0000
    Register 0629 is: 0000
    Register 062A is: 0000
    Register 0638 is: 0000
    Register 0639 is: 0000
    Register 063A is: 0000
    Register 063B is: 0000
    Register 063C is: 002d
    Register 063D is: 0000
    Register 063E is: 0000
    Register 0640 is: 0008
    Register 080D is: 2ebf
    Register 0814 is: 4800
    Register 0822 is: 11e1
    Register 0837 is: 00f8
    Register 0869 is: 9666
    Register 086A is: 0009
    Register 0871 is: 00ee
    Register 0872 is: 0004
    Register 0873 is: 0004
    Register 0875 is: 0c08
    Register 087C is: 0080
    Register 087D is: 0001
    Register 0881 is: 5146
    Register 0894 is: 5df7
    Register 08A0 is: 09e7
    Register 08A3 is: 24e8
    Register 08AD is: 3c51
    Register 08B0 is: 0202
    Register 08B1 is: 0014
    Register 08B2 is: 0008
    Register 08B3 is: 005a
    Register 08B4 is: 005a
    Register 08B5 is: 00ea
    Register 08BA is: 2828
    Register 08BB is: 6828
    Register 08BC is: 0028
    Register 08BE is: 02a1
    Register 08BF is: 0000
    Register 08C0 is: 4000
    Register 08C1 is: 0900
    Register 08C5 is: 4000
    Register 08C7 is: 2000
    Register 08EC is: 0000
    Register 08F9 is: 1f11
    Register 08FC is: 4091
    Register 0AB5 is: 0033
    Register 0D00 is: 0000
    Register 0D01 is: 0000
    Register 0D02 is: 0000
    Register 0D03 is: 0000
    Register 0D04 is: 0000
    Register 0D05 is: 0000
    Register 0D08 is: 0000
    Register 0D09 is: 0000
    Register 0D0A is: 0000
    Register 0D0B is: 0000
    Register 0D0B is: 0000
    Register 0D10 is: 0000
    Register 0D11 is: 0000
    Register 0D12 is: 0000
    Register 0D13 is: 0000
    Register 0D14 is: 0000
    Register 0D15 is: 0000
    Register 0D16 is: 0000
    Register 0D17 is: 0000
    Register 0D18 is: c000
    Register 0D19 is: 0000
    Register 0D1A is: 0000
    Register 0D1B is: 0000
    Register 0D20 is: 800a
    Register 0D21 is: 0000
    Register 0D22 is: 0000
    Register 0D23 is: 0000
    Register 0D24 is: 0000
    Register 0D26 is: 0000
    Register 0D27 is: 0084
    Register 0D28 is: f788
    Register 0D29 is: 0000
    Register 0D2A is: 0000
    Register 0D2B is: 0000
    Register 0D30 is: 0000
    Register 0D33 is: 0000
    Register 0D34 is: 0300
    Register 0D35 is: cccd
    Register 0D36 is: cccc
    Register 0D37 is: 0000
    Register 0D38 is: 0000
    Register 0D39 is: 0025
    Register 0D3A is: 0000
    Register 0D3B is: 0000
    Register 0D3C is: 0000
    Register 0D3D is: 0000
    Register 0D3E is: 0000
    Register 0D3F is: 0000
    Register 0D40 is: 0000
    Register 0D41 is: 0000
    Register 0D42 is: 0000
    Register 0D43 is: 0000
    Register 0D80 is: 8002
    Register 0D81 is: f022
    Register 0D82 is: 0000
    Register 0D83 is: 0000
    Register 0D84 is: 0000
    Register 0D85 is: 0000
    Register 0D86 is: 0000
    Register 0D87 is: 0000
    Register 0D88 is: 0000
    Register 0D89 is: 0000
    Register 0D8A is: 0001
    Register 0D8B is: 0000
    Register 0D8C is: 0000
    Register 0D8D is: 0000
    Register 0D8E is: 0000
    Register 0D8F is: 0000
    Register 0D90 is: 0000
    Register 0D91 is: 0000
    Register 0D92 is: 1800
    Register 0D93 is: 0000
    Register 0D94 is: 0000
    Register 0D95 is: 0000
    Register 0D96 is: 0000
    Register 0D97 is: 0bb0
    Register 0D9B is: 0000
    Register 0D9C is: 0000
    Register 0D9D is: 0000
    Register 0D9E is: 0000
    Register 0D9F is: 0000
    Register 0DA0 is: 0000
    Register 0DA1 is: 0000
    Register 0DA2 is: 0000
    Register 0DA3 is: 0000
    Register 0DA4 is: 4000
    Register 0DA5 is: 0000
    Register 0DA6 is: 0000
    Register 0DA7 is: 0000
    Register 0DA8 is: 0000
    Register 0DB1 is: 0800
    Register 0DB5 is: 0000
    Register 0DB6 is: 0000
    Register 0DB7 is: 0000
    Register 0DB8 is: 0000
    Register 0DBB is: 0000
    Register 0DBC is: 0400
    Register 0DBD is: 0000
    Register 0DBE is: 0000
    Register 0DBF is: 0001
    Register 0DC0 is: 0000
    Register 0DC1 is: 0f07
    Register 0DC2 is: 0000
    Register 0DC3 is: 0000
    Register 0DC4 is: 0000
    Register 0DC5 is: 0000
    Register 0DC6 is: 0000
    Register 0DC7 is: 0000
    Register 0DC8 is: 0000
    Register 0DC9 is: 0000
    Register 0DCA is: 0000
    Register 0DCB is: 0000
    Register 0DCC is: 0000
    Register 0DCD is: 0000
    Register 0DCE is: 0000
    Register 0DCF is: 0000
    Register 0DD0 is: 0000
    Register 0DD1 is: 0000
    Register 0DD2 is: 0000
    Register 0DD3 is: 0000
    Register 0DD4 is: 0000
    Register 0DD5 is: 0000
    Register 0DD6 is: 0000
    Register 1007 is: 003d
    Register 1009 is: 0000
    Register 1012 is: 0002
    Register 1834 is: c001
    Register 1900 is: 0000
    Register 1901 is: 0901
    Register 1902 is: 0002
    Register 1903 is: 0002
    Register 1904 is: 0000
    Register 3904 is: 0000
    Register 3905 is: 0000
    Register 3906 is: 0000
    Register 3907 is: 0000
    Register 3908 is: 0000
    Register 390A is: 0000
    Register 390B is: 0000
    Register 390C is: 0000
    Register 390D is: 0000
    Register 7200 is: 0000

    Witch Register you looking for?

    Best regards

    Dominik

  • 0 in reply to Dominik Berners
    TI__Genius 14970 points

    Hi Dominik,

    I will look over this and will get back to you as soon as possible.

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    TI__Genius 14970 points

    Hi Dominik,

    The Link Status register bit, 0x01[2], indicates that the link is up. If the DP83TG721 is strapped to managed mode, the PHY will only be able to link-up after writing 0x0001 to register 0x018C. What is the link partner for this PHY? In addition, are you using an initialization script of any kind? In the secure resources file for the device, there is an Open Alliance initialization script. If you use this to initialize the device, do you still see link issues?

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    Prodigy 10 points

    Hi Greg,

    thanks for your response. According to your answer, i see the register 0001 changes from 0x0141 to 0x0145 when link is established. So the 1000BASE-T1 Link seems ok, but the media-converter funktion still doesent work. I checked the register for sgmii status (register 060A). The SGMII link is down (bit 11 = 0). So the connection between 1000BASE-T1-PHY and the 1000BASE-T-PHY is broken and i am wondering why cause its a connection on the board. How can i debugg this connection?

    I dont use a initialization script and cannot find any skript for this Board. I have several link partner from diffrent Manufacturer.

    For a better overview: i am testing a connection from one PC to another routed over a switch. The link between the switch and PC2 i replaced with two 1000BASE-T1-media-converter and a 1000BASE-T1 line. Thats working fine bevore i replaced the first media-converter with this Eval-board. Recently, I received another evaluation board, the DP83TG720EVM-MC. I replaced the previously used TI board with this one. The result was a flawless connection. Nevertheless, I would still like to get the DP83TG721EVM-MC up and running and perform tests with it.

    Best regards,

    Dominik

  • 0 in reply to Dominik Berners
    TI__Genius 14970 points

    Hi Dominik,

    Thank you for the update. Could you please send a photo of the EVM so I can verify the jumper configuration? Currently the TX packet counter register, 0x639, is showing a value of 0 in your register dump. Oftentimes this points to a mismatch in MAC interface. 

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    Prodigy 10 points

    Hi Greg,

    i am sorry, i cannot upload a picture cause there is a problem with the upload. When i drag and drop the picture to the text field, i get the error message: "We apologize, but an unexpected issue prevented the page you requested from being available. We've logged the issue so the site administrator can resolve the problem." Using Insert>Image/video/file open up a window where i can only enter a link. No file drop works and there is no file search or upload option.

    So instead i write down all jumpers who are connected (all other connector are open):

    SPE Board:

    • J4  Pin2-Pin3
    • J5  Pin1-Pin2
    • J6  Pin2-Pin3
    • J10 Pin1-Pin2
    • J11 Pin1-Pin2
    • J12 Pin2-Pin3
    • J13 Pin1-Pin2
    • J15 Pin1-Pin2
    • J20 Pin1-Pin2
    • J21 Pin1-Pin2
    • J22 Pin1-Pin2
    • J23 Pin1-Pin2
    • J24 Pin1-Pin2
    • J25 Pin2-Pin3
    • J26 Pin1-Pin2
    • J27 Pin1-Pin2

    RJ45 Board

    • J1_1 Pin1-Pin2
    • J2_1 Pin1-Pin2
    • J3_1 Pin1-Pin2
    • J4_1 Pin1-Pin2
    • J5_1 Pin1-Pin2

    Best regards,

    Dominik

  • 0 in reply to Dominik Berners
    TI__Genius 14970 points

    Hi Dominik,

    Thanks for the written description of the strapping. Does attaching the photo work if you put it in a .zip file and attach the zip? I will check over the listed configuration in the meantime.

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    TI__Genius 14970 points

    Hi Dominik,

    Is it possible to send this zip file with the photo? Sometimes the pin enumerations described in the EVM User's Guide create confusion with the board.

    Best regards,

    Greg