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

High-speed Eye Mask:

7.2.2.1.1 For a Host Side Application

1. Configure the TUSB211A-Q1 to the desired EQ setting.

2. Power on (or toggle the RSTN pin if already powered on) the TUSB211A-Q1.

3. Using SMA cables, connect the oscilloscope and the USB-IF host-side test fixture to the TUSB211A-Q1.

4. Enable the host to transmit USB TEST_PACKET.

5. Execute the oscilloscope USB compliance software.

6. Repeat the above steps to re-test TUSB211A-Q1 with a different EQ setting (must reset to change).

7.2.2.1.2 For a Device Side Application

1. Configure the TUSB211A-Q1 to the desired EQ setting.

2. Power on (or toggle the RSTN pin if already powered on) the TUSB211A-Q1.

3. Connect a USB host, the USB-IF device-side test fixture, and USB device to the TUSB211A-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 to re-test TUSB211A-Q1 with a different EQ setting (must reset to change).

7.2.3 Application Curves

Various

cable

lengths

Redriver-EVM

Figure 7-2. Near End Eye Measurement Set-Up With Pre-Channel Cable

Figure 7-3. 2 Meter Pre-Channel Without TUSB211A-Q1

Figure 7-4. 2 Meter Pre-Channel With TUSB211A-Q1 EQ=1

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TUSB211A-Q1

SLLSFX8 – FEBRUARY 2024

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Product Folder Links: TUSB211A-Q1