GL850 USB 2.0 4-Port HUB Controller

©2000-2003 Genesys Logic Inc.—All rights reserved.

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Table 5.14 - String Index2 for Full Speed

Offset

Field

Value

Description

I/O

Configuration

EEPROM

Configuration

0

bLength

xxh

x bytes for this descriptor

-

Y

1

bDescriptorType

03h

String descriptor type

-

Y

2

bString

Unicode encoded product string –

No default setting

-

Y

5.4.2 High Speed Case

5.4.2.1 Device Descriptor

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.

Table 5.15 - Device Descriptor for High Speed

Offset

Field

Value

Description

I/O

Configuration

EEPROM

Configuration

0

bLength

12h

18 bytes for this descriptor

-

-

1

bDescriptorType

01h

Device descriptor type

-

-

2

bcdUSB

0200h USB2.0 compliance

-

-

4

bDeviceClass

09h

Hub class code

-

5

bDeviceSubClass

00h

Subclass code

-

6

bDeviceProtocol

01h

Single TT

-

7

bMaxPacktSize0

40h

Max. packet size of

endpoint0

-

8

idVendor

05E3h

Vendor ID of Genesys

Logic Inc.

Y

10

idProduct

0660h

Product ID of Genesys

Logic Inc.

Y

12

bcdDevice

xxxxh Version Control

Y

14

iManufacturer

00h

Index of vendor string

Y

15

idProduct

01h

Index of product string

-

Y

16

iSerialNumber

00h

Index of serial number

-

Y

17

bNumConfigurations

01h

Number of configuration

-

-