gl850 ETC-unknow, gl850 Datasheet - Page 32

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

5.4.2 High Speed Case
5.4.2.1 Device Descriptor
©2000-2003 Genesys Logic Inc.—All rights reserved.
High Speed Device Descriptor is replied when hub is operated in high speed mode. The content of high speed Device
Descriptor is almost the same as Full Speed Device Descriptor, except the bDeviceProtocol value is 01h, which means
GL850 is a single TT hub.
Offset
Offset
10
12
14
15
16
17
0
1
2
0
1
2
4
5
6
7
8
bLength
bDescriptorType
bString
bLength
bDescriptorType
bcdUSB
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacktSize0
idVendor
idProduct
bcdDevice
iManufacturer
idProduct
iSerialNumber
bNumConfigurations
Field
Field
Table 5.15 - Device Descriptor for High Speed
Table 5.14 - String Index2 for Full Speed
Unicode encoded product string –
No default setting
05E3h
0200h USB2.0 compliance
0660h
Value
Value
xxxxh Version Control
xxh
03h
12h
01h
09h
00h
01h
40h
00h
01h
00h
01h
x bytes for this descriptor
String descriptor type
18 bytes for this descriptor
Device descriptor type
Hub class code
Subclass code
Single TT
Max. packet size of
endpoint0
Vendor ID of Genesys
Logic Inc.
Product ID of Genesys
Logic Inc.
Index of vendor string
Index of product string
Index of serial number
Number of configuration
Description
Description
GL850 USB 2.0 4-Port HUB Controller
Configuration
Configuration
I/O
I/O
-
-
-
-
-
-
-
-
-
Configuration
Configuration
EEPROM
EEPROM
Y
Y
Y
Y
Y
Y
Y
Y
Y
-
-
-
-
-
-
-
-
Page 32