Rx Header Packet Retransmission Test - Ellisys USB Explorer 280 User Manual

The test passes if the exchanges are met, no timeout is detected, all packets
are successfully received by the PUT, all credits are restored and the link
stays in U0 for at least 50ms.
If Examiner is configured as a Downstream Port:
a. It will issue a Get Device Descriptor request, but will send the SETUP DP with the first
framing error listed above.
The test passes if the exchanges are met, no timeout is detected, all packets
are successfully received by the PUT, all credits are restored and the link
stays in U0 for at least 50ms.
The test fails if the data exchange fails at the protocol layer (i.e., if the PUT
replies with a TP ACK having the sequence number set to zero – indicating the
PUT detected a data payload error).
b. Repeat the testing above for each framing error.
Specification Reference
Sections 7.2.4.1.6#1, 2 ● 8.11.4

7.7 RX Header Packet Retransmission Test

Test Summary
This test verifies that the PUT will send an LBAD if a header packet is incorrectly received, and
that the retransmission will be correctly handled.
Link Layer Tests | 57 of 124