SLLA593 August 2022 TUSB211 , TUSB212 , TUSB216 , TUSB216I , TUSB217A
Compliance testing is necessary for USB devices and hosts to verify their operation over a wide set of criteria defined by the USB 2.0 standard. Performing high-speed signal quality testing with the TUSB21XX USB 2.0 redrivers varies by both device and method of testing. This document will detail the various procedures and methods for performing HS signal quality testing and their compatibility among the TUSB21XX redrivers for host, device, and embedded host test modes. Behavior of the output flags high-speed enable (ENA_HS) and connection-detected (CD) are recorded throughout each stage and mode of testing to assist in debugging device state.