Bos (Binary Device Object Store) Descriptor; Usb2.0 Extension Descriptor (High-/Full-Speed Only); Super Speed Usb Device Capability Descriptor (High-/Full-Speed Only) - Renesas mPD720231 User Manual

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PD720231

4.2 BOS (Binary device Object Store) Descriptor

The BOS descriptor defines a root descriptor that is similar to the configuration descriptor, and is the base
descriptor for accessing a family of related descriptors.
Offset Field
0 bLength
1 bDescriptorType
2 wTotalLength
4 bNumDeviceCaps
4.2.1

USB2.0 Extension Descriptor (High-/Full-speed only)

A Super-speed device shall include the USB2.0 Extension descriptor and shall support LPM when
operating in USB2.0 High-speed mode.
Offset Field
0 bLength
1 bDescriptorType
2 bDevCapabilityType
3 bmAttributes
4.2.2

Super Speed USB Device Capability Descriptor (High-/Full-speed only)

Device Capability descriptors describe individual technology-specific or generic device-level capability.
Offset Field
0 bLength
1 bDescriptorType
2 bDevCapabilityType
3 bmAttributes
4 wSpeedsSupported
6 bFuntionalitySupport
7 bU1DevExitLat
8 bU2DevExitLat
R19UH0094EJ0100 Rev 1.00
Mar 1, 2013
Size Value
1 05h Size of descriptor
1 0Fh BOS descriptor type
2 0016h Length of this descriptor and all of its sub descriptors
1 02h The number of separate device capability descriptors
in the BOS.
Size Value
1 07h Size of descriptor
1 10h Device capability descriptor type
1 02h Capability type: USB2.0 Extension
4 00000002h Link Power Management protocol supported
Size Value
1 0Ah Size of descriptor
1 10h Device capability descriptor type
1 03h Capability type: Super Speed USB Device Capability
1 00h Latency Tolerance Messages not supported
2 000Eh Super/High/Full-speed supported
1 03h Full functionality
1 0Ah U1 Device Exit Latency
2 03E8h U2 Device Exit Latency
4. USB Descriptor Information
Description
Description
Description
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