isp1122 NXP Semiconductors, isp1122 Datasheet - Page 15

• Manufacturer Part Number: isp1122
• Description: Isp1122 Universal Serial Bus Stand-alone Hub
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 07002
Product specification
9.3 Descriptors
The ISP1122 hub controller supports the following standard USB descriptors:
Table 10: Device descriptor
Values in square brackets are optional.
15
16
17
Offset
(bytes)
0
1
2
4
5
6
7
8
10
12
14
•
•
•
•
•
•
Device
Configuration
Interface
Endpoint
Hub
String.
Field name
bLength
bDescriptorType
bcdUSB
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
idVendor
idProduct
bcdDevice
iManufacturer
iProduct
iSerialNumber
bNumConfigurations
Rev. 03 — 29 March 2000
Size
(bytes)
1
1
2
1
1
1
1
2
2
2
1
1
1
1
Value
(Hex)
12
01
10, 01
09
00
00
40
CC, 04
22, 11
01, 01
00
[01]
00
[02]
00
01
Comments
descriptor length = 18 bytes
type = DEVICE
USB Specification Rev. 1.1
HUB_CLASSCODE
-
-
packet size = 64 bytes
Philips Semiconductors vendor ID
(04CC); can be customized using an
external EEPROM (see
ISP1122 product ID; can be
customized using an external
EEPROM (see
device release 1.1; silicon revision
increments this value
no manufacturer string (default)
manufacturer string enabled
(using an external EEPROM)
no product string (default)
product string enabled
(using an external EEPROM)
no serial number string
one configuration
USB stand-alone hub
Table
© Philips Electronics N.V. 2000. All rights reserved.
ISP1122
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