gl850 ETC-unknow, gl850 Datasheet - Page 28

• Manufacturer Part Number: gl850
• Description: Usb 2.0 4-port Hub Controller
• Manufacturer: ETC-unknow

5.4.1.2 Device Qualifier Descriptor
5.4.1.3 Configuration Descriptor
©2000-2003 Genesys Logic Inc.—All rights reserved.
Hub returns Device Qualifier Descriptor when GET_DESCRIPTOR (DEVICE_QUALIFIER) command is
issued from host.
When host issues GET_DESCRIPTOR (CONFIGURATION) command to the hub, hub will return
Configuration Descriptor, Interface Descriptor, and Endpoint Descriptor in combination to the host.
Offset
Offset
0
1
2
4
5
6
7
8
9
0
1
2
4
5
6
7
8
bLength
bDescriptorType
bcdUSB
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
bNumConfigurations
bReserved
bLength
bDescriptorType
wTotalLength
bNumberInterface
bConfigurationValue
iConfiguration
bmAttribute
bMaxPower
Field
Field
Table 5.6 - Configuration Descriptor for Full Speed
Table 5.5 - Device Qualifier for Full Speed
0200h USB2.0 compliance
0019h Total 25 bytes
Value
Value
0Ah
E0h
06h
09h
00h
01h
40h
01h
00h
09h
02h
01h
01h
00h
32h
10 bytes for this descriptor
Device qualifier descriptor
type
Hub class code
Subclass code
Single TT
Max. packet size for
endpoint0 of other speed
Number of other speed
config.
Reserved for future use
9 bytes for this descriptor
Configuration descriptor
type
Number of interfaces
Configuration value
Index of string descriptor
Can
power and bus power
Max. power = 100 mA
switch
Description
Description
between
GL850 USB 2.0 4-Port HUB Controller
self
Configuration
Configuration
I/O
I/O
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Configuration
Configuration
EEPROM
EEPROM
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Page 28