Link Layer Tests
| 59 of 124
S
u
pe
rS
pe
ed
U
S
B
Ex
pl
o
re
r
2
8
0
f.
Examiner waits for the PUT Port Configuration Ack LMP.
If Examiner is configured as a Downstream Port:
a.
It waits for the PUT Port Capability LMP.
b.
It transmits its PUT Port Capability LMP with the first invalid condition above.
c.
It verifies the PUT replies with an LBAD.
d.
It transmits a LRTY and then retransmits the packet.
e.
It waits for the Port Configuration LMP.
f.
It validates the Port Configuration LMP.
g.
It transmits its Port Configuration Ack LMP.
Examiner will keep the link active by sending Link Pollings (LUP when
Examiner is configured as Upstream Port, LDN when Examiner is configured
as a Downstream Port).
3.
Repeat the above steps for each of the invalid conditions listed above.
The test passes if the exchanges are met, no timeout is detected, the PUT
responds to the invalid packets with an LBAD, all other packets are
successfully received, all credits are restored and the link stays in U0 for at
least 50ms.
Specification Reference
Section 7.2.4.1.4#3, #4
7.8
TX Header Retransmission Test
Test Summary
This test verifies that the PUT will correctly retransmit a header packet upon receipt of an LBAD.
Test Steps and Expected Results
1.
Do steps 1 to 3 of TD7.1 (Link Bring-Up Test) to bring the link to U0.
2.
Examiner will respond to the first packet sent by the PUT with an LBAD.
