TPS25751: USBC Functional Compliance Test TD 4.5.4 DRP Connect DRP Test fail

Hi Wei-Ting, 

Thank you for reaching out!

Could you provide more information on the DRP application? Is there a battery charger in the system?

Which power path is used for sourcing the 5V (PP5V or PPHV)? 

The timing requirements are specified below in the USB Type C spec:

Best Regards, 

Aya Khedr

Hi Aya,

I can provide the EEPROM binary and configuration file we currently use. They will be included in the zip file below.

config (31).zip

There is a battery charger in our system, and it uses PPHV for sourcing the 5V.

If you need more information, please let me know, thank you.

Hi Wei Ting, 

Could you also provide the Ellisys failure log? Are you able to determine the time in which the PD controller begins to source 5V? 

Just to confirm, are they using the PD controller's I2C integrated control for the BQ?

Best Regards, 

Aya Khedr 

Hi Aya,

Ellisys failure log is attached in the below archive.

2024-12-18 163524627 - USB Compliance Report.zip

Aya Khedr said:

Are you able to determine the time in which the PD controller begins to source 5V?

We did not deliberately control the time to source 5V voltage, so we probably cannot to determine it.

Aya Khedr said:

Just to confirm, are they using the PD controller's I2C integrated control for the BQ?

In some cases, the firmware does have some algorithms to control the BQ charger, such as setting the CHRG_INHIBIT bit to stop charging or obtaining the ADC value of the charging current, etc.

I want to know if the timing of source 5V and controling BQ charger will seriously affect the TD 4.5.4 test?

Thanks.

Hi Wei-Ting, 

Thank you for providing the logs. I will review and get back to you with feedback by Friday. 

Best Regards, 

Aya Khedr

Hi Aya,

After we modified the PD firmware configuration with ACT, we re-tested TD 4.5.4 and obtained the latest test results. It seems that the two main problems are tVbusOn timeout (greater than 275ms) and Vbus enabling taking too long.

We would like to ask if you can help us modify the time of tVbusON and enabling VBUS? Because ACT does not open such options for us to change them.

I provide the configuration below we used to generate the firmware. If possible, please help us confirm whether there are any errors in our settings regarding this test item.

{
  "questionnaire": {
    "device": "TPS25751",
    "toolBuildVersion": "1.0.2",
    "answers": [
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      0,
      0,
      3,
      1,
      1,
      2,
      0,
      1,
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      0,
      0,
      0
    ],
    "vendorId": "2CC2",
    "productId": "002E",
    "version": "1.0.0.2"
  },
  "configuration": {
    "data": {
      "selected_ace": [
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          "register": 6,
          "data": [
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            0
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        },
        {
          "register": 22,
          "data": [
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            0,
            0,
            3
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        },
        {
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          "data": [
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        },
        {
          "register": 41,
          "data": [
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        },
        {
          "register": 50,
          "data": [
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          "register": 125,
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        {
          "register": 152,
          "data": [
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        }
      ]
    }
  }
}

Since the current project is about to be mass-produced, please provide assistance as soon as possible if possible. Thank you.

Hi Wei-Ting, 

I don't see anything of concern in the json provided in relation to this particular failure. 

I will replicate on my end and get back to you with feedback early next week. Please do let me know if you see other failures that I can look into in parallel. 

Is the following thread for the same project? https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1455707/tps25751-test-pd-prot-src-8-vconn_swap-response-test-failed

Best Regards, 

Aya Khedr 

Hi Aya,

Aya Khedr said:

Is the following thread for the same project? https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1455707/tps25751-test-pd-prot-src-8-vconn_swap-response-test-failed

Yes, this thread is for the same project. The issue encountered on both threads also share the same ACT configuration to generate PD firmware.

Now we are left with only two test items, TD 4.5.4 DRP Connect DRP Test and TEST.PD.PROT.SRC.8 VCONN_Swap Response, which have not yet passed.

Hi Aya,

In addition, we have previously asked you about the failure of the Battery Status test item in another ticket (URL: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1452899/tps25751-source-and-sink-capable-uuts-test-fail), today the test laboratory updated the results again that some test items are still failed. They are TEST.PD.PROT.PORT3.1 Get Battery Status Response and TEST.PD.PROT.PORT3.3 Get Battery Cap Response.

I will also attach these two trace logs below.

TEST.PD.PROT.PORT3.1.zip

TEST.PD.PROT.PORT3.3.zip

Please expect some delays in response due to holidays.

Hi Wei-Ting, 

1- I reviewed the logs provided and made some changes to the json (see attached) that should pass both tests related to Battery capabilities and Battery Status responses TEST.PD.PROT.PORT3.1 and TEST.PD.PROT.PORT3.3. 

See changes below: 

•  Number of batteries field in Tx Source Capabilities register 0x77 should be set to 1.

• Sink Operational PDP was set to 0W which was causing a failure. See the following descriptions from the USB PD specification.

2- In terms of the VCONN Swap failure, TEST.PD.PROT.SRC.8, I was able to test on my end using a TPS25751EVM with the json and VIF provided on this thread. This test passed on both GRL and Ellisys (I did not test on Lecroy). 

Looking at the logs you provided, it seems that the PD controller is responding the VCONN swap messages with an "Accept" message, meaning that this could be a false tester issue.

3- Lastly, I am still analyzing the following failure, TD 4.5.4 DRP Connect DRP Test, and will get back to you with more feedback this week. 

{
  "questionnaire": {
    "device": "TPS25751",
    "toolBuildVersion": "1.0.2",
    "answers": [
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      0,
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    ],
    "vendorId": "2CC2",
    "productId": "002E",
    "version": "1.0.0.2"
  },
  "configuration": {
    "data": {
      "selected_ace": [
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          "register": 6,
          "data": [
            0,
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        },
        {
          "register": 22,
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        {
          "register": 41,
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          "data": [
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    }
  }
}

Best Regards, 

Aya Khedr

Hi Aya,

TEST.PD.PROT.SRC.8
After our confirmation, we found that LeCroy tester determined that the reason for VCONN SWAP failure is that it sent multiple VCONN_SWAP messages, and our PD devices almost all responded "Accept" after receiving them but we did not reply to the last one. 

Please refer to the screenshot of my log below. The VCONN_SWAP message of packet 134 seems to have not been responded to. After many tests we still failed here.

Thanks.

Hi Wei-Ting, 

According to the CTS, if the UUT reponds with a Wait message in PD2 mode (in the case here), the tester should resend the VCONN swap message which I do not see happening in the Lecroy logs. I will share GRL logs for reference at the end of the week. 

Are you able to test with Ellisys or GRL? 

Best Regards, 

Aya Khedr 

Hi Aya,

We can arrange our device to test with Ellisys.

In addition, is there any update for the TD 4.5.4 failure?

Thanks.

Wei-TIng

Hi Aya Kedr,

Wei-Ting and i would like to know

 if there is any further solution to provide us or not?

What’s will be the next progress of this issue? We need TI's advice

Thanks

BRs

Yuliang Chen

Hi Aya Khedr,

Wei-Ting go to the lab today.

This fail item can be pass by Ellisys, but there are other fails at Eilisys. So we can’t uset Ellisys to pass the test also.

And our test lab don’t have GRL on hand, so we can’t pass the test by using Ellisys.

What will be the next progress? We still need TI’s advice.

Thanks

BRs

Yuliang Chen

Hi Aya,

We have submitted our products for USB-IF IEC62680 certification. According to your answer on this ticket, the failure of our product in the two test items TEST.PD.PROT.SRC.8 and TD 4.5.4 with the Ellisys or LeCroy tester is caused by a known tester issue, we therefore submitted them as waiver items.

Since USB-IF asked us for documents or mails between PD vendor (TI) of our products and the PD test instrument vendor to prove that these are known tester issues.

Could you please provide us with this information so that we can inform USB-IF to obtain IEC62680 certification? Thanks.

Best regards,

Dave

Hi Wei-Ting, 

I will check internally and get back to you early next week. 

Best Regards, 

Aya Khedr 

Hi Wei-Ting, 

I need additional time to provide the tester issue details. Thank you for your patience. 

Best Regards, 

Aya Khedr

Dear Aya Khedr,

We need to get the USB-IF Approve for production, the original production plan already delay,

Please help us to get related information as the first priority~

Thanks

BRs

Yuliang

Hi Yuliang,

Aya is currently on leave, and I'll be helping support this thread in the meantime.

I'm checking with the team to see who knows about these waivers.

Can you send the test logs for the specific tests you want waived? And for which tester do you want the test waived for? Worst case I can reach out to the tester manufacturers again, they are typically quick to respond.

Thanks and Regards,

Chris

Dear Chris,

Wei-Ting will reply you soon,

Thanks for your support~

BRs

Yuliang Chen

Hi Christopher,

I upload the test trace of each of the waivers below.

TEST.PD.PROT.SRC.8

4505.TEST.PD.PROT.SRC.8.zip

The tester we want to waive for TEST.PD.PROT.SRC.8 is LeCroy M310e.

TD 4.5.4 DRP Connect DRP Test

Ellisys 4.5.4 Test Trace.zip

The testers we want to waive for TD 4.5.4 is LeCroy M310e and Ellisys ex350.

Thanks.

Best regards,

Wei-Ting

Hi Wei-Ting,

Regarding the Lecroy test issue, can you ask the test house to update to the latest Compliance Suite Version and retest this test? I did a quick check and it looks like they are running 7.92, but the latest is 8.00. Please have them test this again and provide the test traces if it fails again, this test may have been addressed in the latest release. If it fails on the latest, I will reach out to Lecroy.

https://www.teledynelecroy.com/support/softwaredownload/psgdocuments.aspx?standardid=4&mseries=652

For the Ellisys issue, can you share the VIF used? I tried loading the one in the file and it seems incomplete. Which version of VIF Editor are you using?

Are there any additional test logs that come with the Ellisys report? I tried reviewing the .u31t file in the Ellisys Type-C Tracker Analyzer tool but it just shows a USB 2.0 overview with a reset?

The Compliance Report.html report provides info on failed tests, but no information on how the tests are run and where it fails. I need more info to debug this one.

Thanks and Regards,

Chris

Hi Christopher,

We will ask the test house what they think about retesting with the latest version of the instrument firmware, and if they agree we will retest again.

Christopher Lim1 said:

For the Ellisys issue, can you share the VIF used? I tried loading the one in the file and it seems incomplete. Which version of VIF Editor are you using?

I shared the VIF we used below. The version of VIF editor we were using is v3.32.

Teufel__OA2303__DV_0103.zip

Christopher Lim1 said:

Are there any additional test logs that come with the Ellisys report? I tried reviewing the .u31t file in the Ellisys Type-C Tracker Analyzer tool but it just shows a USB 2.0 overview with a reset?

I found some test logs about TD4.5.4, I hope it can be helpful to you.

Verify_1222_TD 4.5.4.zip

Thanks.

Best regards,

Wei-Ting

Hi Wei-Ting,

Wei-Ting Huang said:

We will ask the test house what they think about retesting with the latest version of the instrument firmware, and if they agree we will retest again.

Thanks, yeah the tester support usually ask me to check the version of the tester.

For the Ellisys issue, it may be more involved. We thought we had seen something related and waived in the past, but it was for a different tester(Lecroy). Looking into this one now.

Thanks and Regards,

Chris

Hi Christopher,

Is there any update? Actually we would like to know whether our two failed items may be caused by firmware or configuration issues rather than tester issues?

Due to the delay in obtaining IEC62680 certification, we are unable to ship the products and suffering losses. Can you and your team help identify the cause and tell us the answer as soon as possible? So that we can report the results to USB-IF to advance the certification progress.

Thanks.

Hi Wei-Ting, 

Thank you for your patience.

Were you able to retest with the latest version on Lecroy? We want to ensure that we have all the information before reaching out for a waiver as they will ask to retest with the latest. 

Wei-Ting Huang said:

Due to the delay in obtaining IEC62680 certification, we are unable to ship the products and suffering losses. Can you and your team help identify the cause and tell us the answer as soon as possible? So that we can report the results to USB-IF to advance the certification progress.

I completely understand your concern. I am working with my team and prioritizing this. Both issues appear to be tester issues, I just need to make sure all information is available for obtaining the waivers. 

Best Regards, 

Aya Khedr 

Hi Aya,

The test house retested our product by using LeCroy M310e with SW 8.00(released on 1/26), TD 4.5.4 can pass test (still failed with Ellisys ex350) but TEST.PD.PROT.SRC.8 is still failed.

We shared the test traces as below.

TD 4.5.4 DRP Connect DRP Test_LeCroy_Pass.zip

TEST.PD.PROT.SRC.08 VCONN_Swap Response_LeCroy_Fail.zip

Thanks.

Best regards,

Wei-Ting

Hi Wei-Ting,

Thank you for confirming that TD 4.5.4 is passing on LeCroy with the latest software.

I have reached out to LeCroy in regards to the TEST.PD.PROT.SRC.8 tester issue and will update you as soon as I hear back from them. 

Do you also require a waiver for TD 4.5.4 on Ellisys? Or is LeCroy passing sufficient?

Best Regards, 

Aya Khedr

Hi Aya,

Aya Khedr said:

Do you also require a waiver for TD 4.5.4 on Ellisys? Or is LeCroy passing sufficient?

Yes, we require a waiver for TD 4.5.4 on Ellisys. USB-C functional test requires at least passing all tests on two instruments from different brands.

I would like to ask when we expect to get a reply from LeCroy and Ellisys?

Thanks.

Best regards,

Wei-Ting

Hi Wei-Ting, 

Do you have the Ellisys Analyzer logs? I am unable to see that from the file shared. 

I am expecting a response tomorrow or early next week. I will keep you updated. 

Best Regards, 

Aya Khedr

Hi Aya,

Aya Khedr said:

Do you have the Ellisys Analyzer logs?

Regarding the test trace of TD 4.5.4 Ellisys, we will provide it to you for analysis as soon as possible.

Aya Khedr said:

I am expecting a response tomorrow or early next week. I will keep you updated. 

We would like to know about the current progress of asking LeCroy whether TEST.PD.PROT.SRC.8 is a tester issue? Is there any target date you can tell us?

In addition, we also want to know is there any possibility that the failure of our TEST.PD.PROT.SRC.8 item is a PD software issue? Because USB-IF also told us that if it is finally found that it is not a tester issue but a configuration issue, we can modify the reason for the waiver. After being evaluated by USB-IF, it may be more helpful for the progress of successfully applying for a waiver.

Thanks.

Best regards,

Wei-Ting

Hi Aya,

We uploaded the latest test trace here.

Ellisys_4.5.4_Fail_0217.zip

Thanks.

Wei-Ting

Hi Wei-Ting, 

Thank you for providing the logs. TI U.S. is on Holiday today. I will get back to you tomorrow! 

Best Regards, 

Aya Khedr 

Hi Aya,

Is there any update? Thanks.

Wei-Ting

Hi Wei-Ting, 

I am waiting to hear back from the Vendors. Thank you for your patience. 

Best Regards, 

Aya Khedr

Hi Aya,

I would like to ask if the log or test trace we provide is helpful for your analysis? Do you still think that the test failure of TEST.PD.PROT.SRC.8 and TD 4.5.4 on our device is a tester issue? So neither Ellisys nor LeCroy have responded to these two respective items yet? 

If there is any update, please let us know, thank you very much.

Best regards,

Wei-Ting

Hi Wei-Ting, 

Yes, these are confirmed to be tester issues on Lecroy. Lecroy responded today saying that they have a new version of compliance suite available (v8.02). Could you retest with the latest and let us know if the issue still persists? (available here)

Best Regards, 

Aya Khedr

Hi Aya,

That's a good news. We'll ask our test house to retest device with the latest firmware of LeCroy M310e.

Also, is there any update from Ellisys regarding the failure of TD 4.5.4?

Best regards,

Wei-Ting