参数资料
型号: ISP1520BD,557
厂商: NXP SEMICONDUCTORS
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件页数: 16/54页
文件大小: 288K
代理商: ISP1520BD,557
ISP1520_4
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 04 — 28 April 2006
22 of 53
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
10. Descriptors
The ISP1520 hub controller supports the following standard USB descriptors:
Device
Device_qualier
Other_speed_conguration
Conguration
Interface
Endpoint
Hub
The hub returns descriptors based on the mode of operation: full-speed or high-speed.
Table 14.
Status Change byte: bit allocation
Bit
Name
Value
Description
0
Hub Status Change
0
no change in the hub status
1
change in the hub status detected
1 to 4
Port n Status Change
0
no change in the status of port n (n = 1 to 4)
1
change in the status of port n (n = 1 to 4)
5 to 7
-
not used
Table 15.
Device descriptor
Offset
(bytes)
Field name
Value (hex)
Comments
Full-speed
High-speed
0
bLength
12
descriptor length = 18 B
1
bDescriptorType
01
type = DEVICE
2
bcdUSB
00
refer to
Universal Serial Bus Specication Rev. 2.0
302
02
4
bDeviceClass
09
HUB_CLASSCODE
5
bDeviceSubClass
00
HubSubClassCode
6
bDeviceProtocol
00
01
HubProtocolHSpeedOneTT
7
bMaxPacketSize0
40
packet size = 64 B
8
idVendor
CC
Philips Semiconductors vendor ID (04CC); can be
customized
904
04
10
idProduct
20
the ISP1520 product ID; can be customized
11
15
12
bcdDevice
00
device ID; can be customized
13
02
14
iManufacturer
01
can be customized
15
iProduct
02
can be customized
16
iSerialNumber
03
can be customized; this value must be unique
17
bNumCongurations 01
01
one conguration
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