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USB3803 데이터시트(PDF) 47 Page - Microchip Technology

부품명 USB3803
상세설명  USB 2.0 High-Speed Hub Controller Optimized
PDF  99 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB3803 데이터시트(HTML) 47 Page - Microchip Technology

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 2014-2015 Microchip Technology Inc.
DS00001691B-page 47
USB3803
7.2.2
CONFIGURATION DESCRIPTORS
The following table provides the configuration descriptors for Full-Speed operation.
15
Product
1
yyh
If STRING_EN =0 Optional string is not supported, and
yy = 00.
If STRING_EN = 1, String support is enabled, and
yy = 02
16
SerialNumber
1
zzh
If STRING_EN =0 Optional string is not supported, and
zz = 00.
If STRING_EN = 1, String support is enabled, and
zz = 03
17
NumConfigurations
1
01h
Supports 1 configuration.
TABLE 7-2:
CONFIGURATION DESCRIPTOR (FULL-SPEED)
Offset
Field
Size
Value
Description
0
Length
1
09h
Size of this Descriptor.
1
DescriptorType
1
02h
Configuration Descriptor Type.
2
TotalLength
2
yyyyh
Total combined length of all descriptors for this configu-
ration (configuration, interface, endpoint, and class- or
vendor-specific).
yyyyh = 0019h
4
NumInterfaces
1
01h
Number of interfaces supported by this configuration.
5
ConfigurationValue
1
01H
Value to use as an argument to the SetConfiguration()
request to select this configuration.
6
Configuration
1
00h
Index of string descriptor describing this configuration
(string not supported).
7
Attributes
1
user/
signal
Configuration characteristics: Communicates the capa-
bilities of the hub regarding Remote Wake-up capability,
and also reports the self-power status. In all cases, the
value reported to the host always indicates that the hub
supports Remote Wakeup.
The value reported to the host is dependant upon the
SELF_BUS_PWR bit (CONFIG_BYTE_1)
= A0h for Bus-Powered (SELF_BUS_PWR = 0).
= E0h for Self-Powered (SELF_BUS_PWR = 1).
All other values are reserved.
TABLE 7-1:
DEVICE DESCRIPTOR (FULL-SPEED) (CONTINUED)
Offset
Field
Size
Value
Description



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