• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 205 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB2E11: eUSB Repeater for compliance test

Eileen Hu
Intellectual 1550 points

Part Number: TUSB2E11

Hi team,

Please help to answer the questions from customer:

Please help confirm how to perform compliance testing for the following USB repeater. Thank you.


Questions:
1. After the SOC completes initialization of the eUSB PHY function, by configuring the eUSB PHY registers to send the standard protocol "Test Packet" pattern on the eDP/eDM signals, can the eUSB Repeater receive and forward the "Test Packet" on the DP/DM signals? How should the eUSB Repeater be configured to achieve this function?

2. If Item 1 cannot be implemented, how to control the eUSB Repeater to enter USB compliance mode and send the "Test Packet" on the DP/DM signals to the Type‑C connector?

Both steps above are intended to test the DP/DM signal eye diagram in USB host and device modes.

Regards,

Eileen

  • 0
    TI__Guru 54585 points

    Hi Eileen,

    Eileen Hu said:
    1. After the SOC completes initialization of the eUSB PHY function, by configuring the eUSB PHY registers to send the standard protocol "Test Packet" pattern on the eDP/eDM signals, can the eUSB Repeater receive and forward the "Test Packet" on the DP/DM signals? How should the eUSB Repeater be configured to achieve this function?

    Once the eUSB2 repeater has been configured by the eUSB2 PHY via the eDP/eDM lanes, the repeater will be able to send the TEST PACKETS from the eUSB2 SOC to the Type-C connector, yes. The TUSB2E11 should be configured by the PHY to be configured as a host repeater, enabling it to translate eUSB2 signals to USB2 signals. Otherwise, the customer can adjust the USB2 PHY in the TUSB2E11 via either GPIO or I2C: 

    Eileen Hu said:
    Both steps above are intended to test the DP/DM signal eye diagram in USB host and device modes.

    Do they want to test with the eUSB2 PHY in Host/Device mode? Or do they just want to measure the eye diagram at the host and at the device? The TUSB2E11 can support both configurations, as long as it is configured via the eDP/eDM lanes.

    Please ensure the customer is using the latest version of the USB Electrical Testing tool, this should be updated to account for the addition of eUSB2: https://www.usb.org/document-library/usbet20

    Thanks,

    Ryan

  • 0 in reply to Ryan Kitto
    TI__Intellectual 1550 points

    Hi Ryan,

    Please check the further questions from customers:

    Question 1:
    We mainly need to verify the eUSB2 PHY in Host/Device mode. However, the eye diagram of DP/DM signals output from the Repeater must also pass the test to ensure the normal operation of the EVB system.
    If the tool in the link below is unavailable, and we only force the SOC eUSB PHY to send "Test Packet", can the TUSB2E11 still support the test mentioned in item 1?

    https://www.usb.org/document-library/usbet20

    Question 2:
    Please also help to check whether we can configure the Repeater via I2C to force it to send "Test Packet" on DP/DM signals to the Type-C connector.

    Regards,

    Eileen

  • +1 in reply to Eileen Hu
    TI__Guru 54585 points

    Hi Eileen,

    Eileen Hu said:
    We mainly need to verify the eUSB2 PHY in Host/Device mode. However, the eye diagram of DP/DM signals output from the Repeater must also pass the test to ensure the normal operation of the EVB system.

    Correct, this is mostly for a TX/Host application. Our repeater should be able to translate the signal on eDP/eDM to DP/DM and out of the connector so the signal can be tested.

    Eileen Hu said:

    If the tool in the link below is unavailable, and we only force the SOC eUSB PHY to send "Test Packet", can the TUSB2E11 still support the test mentioned in item 1?

    https://www.usb.org/document-library/usbet20

    This tool is only used to analyze a waveform that is entered into it, typically as a .csv file. This tool should be able to generate an eye diagram and provide a report of the TX complaince.

    We typically use the XHSETT tool to enable TEST_PACKETs being sent to a USB port from a PHY, but if the PHY is able to output those test packets on it's own then that should also be okay.

    Eileen Hu said:
    Question 2:
    Please also help to check whether we can configure the Repeater via I2C to force it to send "Test Packet" on DP/DM signals to the Type-C connector.

    No, our repeaters do not have the ability to generate TEST_PACKETs and cannot be forced into a configuration via I2C. Our repeater must be configured via the eDP/eDM lanes from the eUSB2 PHY, and then must receive TEST_PACKETs from the PHY.

    Thanks,

    Ryan

  • 0 in reply to Ryan Kitto
    TI__Guru 54585 points

    Hello,

    Closing thread due to inactivity. If you have any follow-up questions or concerns, feel free to reply.

    Thanks,

    Ryan