Descriptors - Philips ISP1122A Product Data

Philips Semiconductors

9.3 Descriptors

9397 750 08958
Product data
The ISP1122A hub controller supports the following standard USB descriptors:
•
Device
•
Configuration
•
Interface
•
Endpoint
•
Hub
•
String.
Table 10: Device descriptor
Values in square brackets are optional.
Offset Field name
(bytes)
0 bLength
1 bDescriptorType
2 bcdUSB
4 bDeviceClass
5 bDeviceSubClass
6 bDeviceProtocol
7 bMaxPacketSize0
8 idVendor
10 idProduct
12 bcdDevice
14 iManufacturer
15 iProduct
16 iSerialNumber
17 bNumConfigurations
Rev. 03 — 30 October 2001
Size Value Comments
(bytes) (Hex)
1 12 descriptor length = 18 bytes
1 01 type = DEVICE
2 10, 01 USB Specification Rev. 1.1
1 09 HUB_CLASSCODE
1 00 -
1 00 -
1 40 packet size = 64 bytes
2 CC, 04 Philips Semiconductors vendor ID
(04CC); can be customized using an
external EEPROM (see
2 22, 11 ISP1122A product ID; can be
customized using an external
EEPROM (see
2 01, 01 device release 1.1; silicon revision
increments this value
1 00 no manufacturer string (default)
[01] manufacturer string enabled
(using an external EEPROM)
1 00 no product string (default)
[02] product string enabled
(using an external EEPROM)
1 00 no serial number string
1 01 one configuration
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
ISP1122A
USB stand-alone hub
Table 23)
Table 23)
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