116 of 124 |
Device Framework Tests
Ex
ami
n
er
U
se
r
G
u
ide
The bLength field in the required SuperSpeed USB sub-descriptor must be
equal to ten (0x0A).
Bit D0 in the bmAttributes field of the SuperSpeed USB sub-descriptor is
reserved and must be set to zero.
Bits D2 through D7 in the bmAttributes field of the SuperSpeed USB sub-
descriptor are reserved and must be set to zero.
USB 2.0 Extension Sub-Descriptor
The bLength field in the required USB 2.0 Extension sub-descriptor must be
equal to seven (0x07).
Bit D1 in the bmAttributes field of the USB 2.0 Extension sub-descriptor (LPM
Support) must be set to one.
Bits D2 through D31 of the bmAttributes field in the USB 2.0 Extension sub-
descriptor are reserved and must be zero.
Specification Reference
USB Command Verifier Compliance Test Specification TD9.7.
9.8
String Descriptor Test
Test Summary
Examiner issues a series of requests for any supported String descriptors and verifies fields
within these descriptors. Various fields in the Device and Configuration descriptors are also
checked.
Test Steps and Expected Results
1.
Examiner initializes link to U0.
2.
Examiner issues several standard descriptor requests, including a request for the Device
descriptor and two Configuration descriptor requests.
Device Descriptor
The Device descriptor must be at least 18 bytes in length.