參數(shù)資料
型號(hào): ISP1521
廠商: NXP Semiconductors N.V.
英文描述: Hi-Speed Universal Serial Bus hub controller
中文描述: 高速通用串行總線控制器樞紐
文件頁數(shù): 25/53頁
文件大?。?/td> 270K
代理商: ISP1521
Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
25 of 53
9397 750 13702
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
11. Descriptors
The ISP1521 hub controller supports the following standard USB descriptors:
Device
Device_qualifier
Other_speed_configuration
Configuration
Interface
Endpoint
Hub.
The hub returns different descriptors based on the mode of operation: full-speed or
high-speed.
Table 14:
Bit
0
Status Change byte: bit allocation
Name
Hub Status Change
Value
0
1
0
1
Description
no change in the hub status
change in the hub status detected
no change in the status of port n (n = 1 to 7)
change in the status of port n (n = 1 to 7)
1 to 7
Port n Status Change
Table 15:
Offset
(bytes)
Device descriptor
Field name
Value (hex)
Full-speed
12
01
00
02
09
00
00
40
CC
04
21
15
00
02
01
02
03
Comments
High-speed
12
01
00
02
09
00
01
40
CC
04
21
15
00
02
01
02
03
01
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
bLength
bDescriptorType
bcdUSB
descriptor length = 18 bytes
type = DEVICE
see USB specification Rev. 2.0
bDeviceClass
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
idVendor
HUB_CLASSCODE
HubSubClassCode
HubProtocolHSpeedOneTT
packet size = 64 bytes
Philips Semiconductors vendor ID (04CC); can be
customized
idProduct
the ISP1521 product ID; can be customized
bcdDevice
device ID; can be customized
iManufacturer
iProduct
iSerialNumber
bNumConfigurations 01
can be customized
can be customized
can be customized; this value must be unique
one configuration
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