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ISP1122ABD 数据表(PDF) 16 Page - NXP Semiconductors

部件名 ISP1122ABD
功能描述  Universal Serial Bus stand-alone hub
PDF  48 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

ISP1122ABD 数据表(HTML) 16 Page - NXP Semiconductors

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Philips Semiconductors
ISP1122A
USB stand-alone hub
Preliminary specification
Rev. 01 — 27 March 2000
16 of 48
9397 750 06986
© Philips Electronics N.V. 2000. All rights reserved.
[1]
Selected by input SP/BP.
[2]
Value in units of 2 mA.
Table 11: Configuration descriptor
Values in square brackets are optional.
Offset
(bytes)
Field name
Size
(bytes)
Value
(Hex)
Comments
0
bLength
1
09
descriptor length=9bytes
1
bDescriptorType
1
02
type = CONFIGURATION
2
wTotalLength
2
19, 00
total length of configuration, interface
and endpoint descriptors (25 bytes)
4
bNumInterfaces
1
01
one interface
5
bConfigurationValue
1
01
configuration value = 1
6
iConfiguration
1
00
no configuration string
7
bmAttributes
1
E0
self-powered with remote wake-up [1]
A0
bus-powered with remote wake-up [1]
8
MaxPower [2]
1
32
100 mA (default)
[00]
0 mA (using an external EEPROM)
[FA]
500 mA (using an external EEPROM)
Table 12: Interface descriptor
Offset
(bytes)
Field name
Size
(bytes)
Value
(Hex)
Comments
0
bLength
1
09
descriptor length=9bytes
1
bDescriptorType
1
04
type = INTERFACE
2
bInterfaceNumber
1
00
-
3
bAlternateSetting
1
01
no alternate setting
4
bNumEndpoints
1
01
status change (interrupt) endpoint
5
bInterfaceClass
1
09
HUB_CLASSCODE
6
bInterfaceSubClass
1
00
-
7
bInterfaceProtocol
1
00
no class-specific protocol
8
bInterface
1
00
no interface string
Table 13: Endpoint descriptor
Offset
(bytes)
Field name
Size
(bytes)
Value
(Hex)
Comments
0
bLength
1
07
descriptor length=7bytes
1
bDescriptorType
1
05
type = ENDPOINT
2
bEndpointAddress
1
81
endpoint 1, direction: IN
3
bmAttributes
1
03
interrupt endpoint
4
wMaxPacketSize
2
01, 00
packet size = 1 byte
6
bInterval
1
FF
polling interval (255 ms)



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