GL850 View Datasheet(PDF) - Genesys Logic
Part Name
Description
MFG CO.
'GL850' PDF : 40 Pages View PDF
GL850 USB 2.0 4-Port HUB Controller
5.4.1.6 Other Speed Configuration Descriptor
An USB2.0 hub returns Other Speed Configuration Descriptor for the command GET_DESCRIPTOR
(OTHER_SPEED_CONFIGURATION). An USB2.0 host will issue this command when the hub plugged is
an USB2.0 hub.
Table 5.9 - Other Speed Configuration Descriptor for Full Speed
Offset
Field
Value
Description
0 bLength
1 bDescriptorType
2 wTotalLength
09h 9 bytes for this descriptor
07h
Other speed descriptor
type
19h Total 25 bytes
4 bNumberInterface
01h Number of interfaces
5 bConfigurationValue 01h Configuration value
6 iConfiguration
7 bmAttribute
8 bMaxPower
00h Index of string descriptor
E0h
Can switch between self
power and bus power
32h Max. power = 100 mA
I/O
EEPROM
Configuration Configuration
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5.4.1.7 Interface Descriptor combined with Other Speed Configuration Descriptor
Other Speed Interface Descriptor is in combination after Other Speed Configuration Descriptor for the
command GET_DESCRIPTOR (OTHER_SPEED_CONFIGURATION).
Table 5.10 - Other Speed Interface Descriptor for Full Speed
Offset
Field
0 bLength
1 bDescriptorType
2 bIerfaceNumber
3 bAlternateSetting
4 bNumEndpoints
5 bInterfaceClass
6 bInterfaceSubClass
7 bInterfaceProtocol
8 iInterface
Value
Description
09h 9 bytes for this descriptor
04h Interface descriptor type
00h Interface number
00h Alternate setting
01h Number of endpoints
09h Hub class code
00h Subclass code
00h Single TT
00h Index of string descriptor
I/O
EEPROM
Configuration Configuration
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©2000-2003 Genesys Logic Inc.—All rights reserved.
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