USB3803 Datasheet, PDF (47/99 Pages) Microchip Technology – USB 2.0 High-Speed Hub Controller Optimized

USB3803
TABLE 7-1: DEVICE DESCRIPTOR (FULL-SPEED) (CONTINUED)
Offset
15
16
17
Field
Product
SerialNumber
NumConfigurations
Size
1
1
1
Value
yyh
zzh
01h
Description
If STRING_EN =0 Optional string is not supported, and
yy = 00.
If STRING_EN = 1, String support is enabled, and
yy = 02
If STRING_EN =0 Optional string is not supported, and
zz = 00.
If STRING_EN = 1, String support is enabled, and
zz = 03
Supports 1 configuration.
7.2.2 CONFIGURATION DESCRIPTORS
The following table provides the configuration descriptors for Full-Speed operation.
TABLE 7-2: CONFIGURATION DESCRIPTOR (FULL-SPEED)
Offset
0
1
2
4
5
6
7
Field
Length
DescriptorType
TotalLength
NumInterfaces
ConfigurationValue
Configuration
Attributes
Size
1
1
2
1
1
1
1
Value
09h
02h
yyyyh
01h
01H
00h
user/
signal
Description
Size of this Descriptor.
Configuration Descriptor Type.
Total combined length of all descriptors for this configu-
ration (configuration, interface, endpoint, and class- or
vendor-specific).
yyyyh = 0019h
Number of interfaces supported by this configuration.
Value to use as an argument to the SetConfiguration()
request to select this configuration.
Index of string descriptor describing this configuration
(string not supported).
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.
 2014-2015 Microchip Technology Inc.
DS00001691B-page 47