μ
PD720231
4. USB Descriptor Information
R19UH0094EJ0100 Rev 1.00
Page 18 of 30
Mar 1, 2013
4.5.2.4
UASP Status
(1)
Endpoint Descriptor
Offset Field Size
Value
Description
0
bLength
1
07h
Size of descriptor
1
bDescriptorType
1
05h
Endpoint descriptor type
2 bEndpointAddress
1
84h
Address 4, Direction: IN
3
bmAttributes
1
02h
Endpoint’s attributes (Bulk)
4 wMaxPacketSize
2
0400h
or
0200h
Maximum packet size
0400h: 1024 bytes in Super-speed mode.
0200h: 512 bytes in High-speed mode.
6
bInterval
1
00h
Interval for polling endpoint for data transfers.
(2)
SuperSpeed Endpoint Companion Descriptor
Offset Field Size
Value
Description
0
bLength
1
06h
Size of descriptor
1 bDescriptorType
1
30h
SUPERSPEED_USB_ENDPOINT_COMPANION
descriptor type.
2
bMaxBurst
1
00h
Max. burst = 1
3
bmAttributes
1
05h
Max. stream = 32.
4 wBytesPerInterval
2
0000h
−
(3)
Pipe Usage Descriptor
Offset Field Size
Value
Description
0
bLength
1
04h
Size of descriptor
1
bDescriptorType
1
24h
Pipe Usage descriptor type.
2 bPipeID
1
02h
Status
pipe
3 Reserved
1
00h
−
