9.2.2.1 Test Procedure to Construct USB High-speed Eye Diagram

Note

USB-IF certification tests for High-speed eye masks require the mandated use of the USB-IF

developed test fixtures. These test fixtures do not require the use of oscilloscope probes. Instead

they use SMA cables. More information can be found at the USB-IF Compliance Updates Page. It is

located under the Electrical Specifications section, ID 86 dated March 2013.

The following procedure must be followed before using any oscilloscope compliance software to construct a USB

High-speed Eye Mask:

9.2.2.1.1 For a Host Side Application

1. Configure the TUSB216-Q1 to the desired BOOST setting

2. Power on (or toggle the RSTN pin if already powered on) the TUSB216-Q1

3. Using SMA cables, connect the oscilloscope and the USB-IF host-side test fixture to the TUSB216-Q1

4. Enable the host to transmit USB TEST_PACKET

5. Execute the oscilloscope USB compliance software.

6. Repeat the above steps in order to re-test TUSB216-Q1 with a different BOOST setting (must reset to

change)

9.2.2.1.2 For a Device Side Application

1. Configure the TUSB216-Q1 to the desired BOOST setting

2. Power on (or toggle the RSTN pin if already powered on) the TUSB216-Q1

3. Connect a USB host, the USB-IF device-side test fixture, and USB device to the TUSB216-Q1. Ensure that

the USB-IF device test fixture is configured to the ‘INIT’ position

4. Allow the host to enumerate the device

5. Enable the device to transmit USB TEST_PACKET

6. Using SMA cables, connect the oscilloscope to the USB-IF device-side test fixture and ensure that the

device-side test fixture is configured to the ‘TEST’ position.

7. Execute the oscilloscope USB compliance software.

8. Repeat the above steps in order to re-test TUSB216-Q1 with a different BOOST setting (must reset to

change)

TUSB216-Q1

SLLSF03A – APRIL 2019 – REVISED SEPTEMBER 2021

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Product Folder Links: TUSB216-Q1