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Link Layer Tests
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The value of tU0RecoveryTimeout deadline is 1ms, but is given a
“calculated test time” expiration of 1.5080ms. This calculated test time is
defined in the USB 3.0 Link Layer Test Specification, Section 4. Please
refer to that document for details.
Examiner will disable transmission of ITPs for testing an Upstream Port.
Test Steps and Expected Results
1.
Examiner performs steps 1 to 4 of TD7.1 (Link Bring-Up Test) to bring the link to U0.
2.
Examiner will not send LDNs or any other link commands.
The test fails if the PUT goes to Recovery before the tU0RecoveryTimeout
deadline (1ms), or if it does not go to Recovery within tU0RecoveryTimeout
expiration (1.5080ms).
Note that the time calculation above is not from the start of U0 to the start
of the recovery sequence; it is from the last link command sent by
Examiner to the start of the recovery sequence.
Specification Reference
Sections 7.3.4#7, 8 ● 7.5.6.1#3 ● 7.5.6.2#6
7.17
tPortConfiguration Timeout Test
Test Summary
This test verifies that a downstream-facing PUT will go to SS.Inactive and an upstream-facing
PUT will go to SS.Disabled if tPortConfiguration expires.
The value of tPortConfiguration deadline is 20us, but is given a “calculated
test time” expiration of 20.6us. This calculated test time is defined in the
USB 3.0 Link Layer Test Specification, Section 4. Please refer to that
document for details.
For both upstream and downstream PUTs, the test will run three parts:
