Link Command Framing Test; Link Command Crc Test - Ellisys USB Explorer 280 User Manual

Specification Reference
Sections 7.2.4.1.1#6 ● 8,10-17,22 ● 7.2.4.1.4#2 ● 7.3.4#2 ● 7.5.6.1#5,6 ● 8.4.5#1
8.4.6#1,3 (downstream) ● 8.4.7#1 (upstream)

7.2 Link Command Framing Test

Test Summary
This test verifies that the PUT can tolerate link commands having one symbol error in the
LCSTART framing. The Port Configuration transaction will be used for this purpose. Here are
the combinations to be tested:
ERR SLC SLC EPF

 SLC ERR SLC EPF
 SLC SLC ERR EPF
 SLC SLC SLC ERR
Test Steps and Expected Results
1. Examiner executes the steps described in TD7.1 (Link Bring-Up Test), to bring the link to
U0, but transmits all LCRD_X link commands with an error in the first LCSTART symbol.
The test passes if the exchanges are met, no timeout is detected, all packets
are successfully received, all credits are restored and the link stays in U0 for
at least 50ms.
2. Repeat the steps above with an error in the second, third, and fourth LCSTART symbols.
Specification Reference
Section 7.3.4#1, 2

7.3 Link Command CRC Test

Test Summary
This test verifies that the PUT initiates a recovery upon receipt of one corrupt CRC5 in each of
the two link command word (one at a time) and then both CRCs corrupted.
Configuration transaction will be used for this purpose.
Reference Errata (June 2010) regarding changes to a port's handling of an
invalid link command (Core Specification Section 7.3.2).
(incorrect symbol is D0.0)
(incorrect symbol is D0.1)
(incorrect symbol is D0.2)
(incorrect symbol is D0.3)
The Port
Link Layer Tests | 53 of 124