gl850 ETC-unknow, gl850 Datasheet - Page 34

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

5.4.2.4 Interface Descriptor
5.4.2.5 Endpoint Descriptor in Configuration Descriptor
©2000-2003 Genesys Logic Inc.—All rights reserved.
bInterval of High Speed Interface Descriptor is 0Ch, which is different from that of Full Speed Endpoint
Descriptor.
Interface Descriptor follows Configuration Descriptor for GET_DESCRIPTOR (CONFIGURATION)
command.
Offset
Offset
0
1
2
3
4
5
6
7
8
0
1
2
3
4
6
bLength
bDescriptorType
bIerfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
iInterface
bLength
bDescriptorType
bEpointAddress
bAttribute
wMaxPacketSize
bInterval
Field
Field
Table 5.19 - Endpoint Descriptor for High Speed
Table 5.18 - Interface Descriptor for High Speed
Value
Value
0Ch
09h
04h
00h
00h
01h
09h
00h
00h
00h
07h
05h
81h
03h
01h
9 bytes for this descriptor
Interface descriptor type
Interface number
Alternate setting
Number of endpoints
Hub class code
Subclass code
Single TT
Index of string descriptor
7bytes for this descriptor
Endpoint descriptor type
Address of the endpoint
Interrupt endpoint
Max. packet size of the
endpoint
Polling interval =
(2
12
-1) X 125 us
Description
Description
GL850 USB 2.0 4-Port HUB Controller
Configuratio
Configuration
I/O
I/O
n
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Configuration
Configuratio
EEPROM
EEPROM
n
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Page 34