參數(shù)資料
型號: 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): 27/53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
27 of 53
9397 750 13702
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
[1]
Value in units of 2 ms.
Table 19:
Offset
(bytes)
Interface descriptor
Field name
Value (hex)
Full-speed
09
04
00
00
01
09
00
00
00
Comments
High-speed
09
04
00
00
01
09
00
00
00
0
1
2
3
4
5
6
7
8
bLength
bDescriptorType
bInterfaceNumber
bAlternateSetting
bNumEndpoints
bInterfaceClass
bInterfaceSubClass
bInterfaceProtocol
bInterface
descriptor length = 9 bytes
type = INTERFACE
-
no alternate setting
status change (interrupt) endpoint
HUB_CLASSCODE
HubSubClassCode
-
no interface string descriptor
Table 20:
Offset
(bytes)
Endpoint descriptor
Field name
Value (hex)
Full-speed
07
05
81
03
01
00
FF
Comments
High-speed
07
05
81
03
01
00
0C
0
1
2
3
4
5
6
bLength
bDescriptorType
bEndpointAddress
bmAttributes
wMaxPacketSize
descriptor length = 7 bytes
type = ENDPOINT
endpoint 1 at the address number 1
interrupt endpoint
packet size = 1 byte
bInterval
polling interval
Table 21:
Offset
(bytes)
Hub descriptor
Field name
Value (hex)
Full-speed
09
29
07
06
05
04
03
02
Comments
High-speed
09
29
07
06
05
04
03
02
A9
00
32
00
64
00
FF
0
1
2
bDescLength
bDescriptorType
bNbrPorts
descriptor length = 9 bytes
type = HUB
number of enabled downstream facing ports; selectable by
DP/DM strapping
3
4
5
wHubCharacteristics A9
see
Table 22
00
bPwrOn2PwrGood
[1]
32
ganged or individual mode = 100 ms
no power switching mode = 0 ms
-
seven downstream facing ports, no embedded port
-
00
64
00
FF
6
7
8
bHubContrCurrent
DeviceRemovable
PortPwrCtrlMask
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