USB3803 Datasheet, PDF (50/99 Pages) Microchip Technology – USB 2.0 High-Speed Hub Controller Optimized

USB3803
TABLE 7-5: 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.
7.3.2 DEVICE QUALIFIER DESCRIPTOR
The following table provides the device qualifier values for High-Speed operation.
TABLE 7-6: DEVICE QUALIFIER (HIGH-SPEED)
Offset
0
1
2
4
5
6
7
8
9
Field
Length
DescriptorType
USB
DeviceClass
DeviceSubClass
DeviceProtocol
MaxPacketSize0
NumConfigurations
Reserved
Size
1
1
2
1
1
1
1
1
1
Value
0Ah
06h
0200h
09h
00h
user
40h
01h
00h
Description
Size of this Descriptor.
Device Descriptor Type.
USB Specification Release Number.
Class code assigned by USB-IF for Hubs.
Class code assigned by USB-IF for Hubs.
Protocol code (01h if customer selects Single-TT, 02h if
customer selects Multiple-TT).
64-byte packet size for the other speed.
Supports 1 other speed configuration.
Reserved.
7.3.3 CONFIGURATION DESCRIPTORS
The following table provides the configuration descriptors for Full-Speed operation.
TABLE 7-7: CONFIGURATION DESCRIPTOR (FULL-SPEED)
Offset
0
1
2
4
Field
Length
DescriptorType
TotalLength
NumInterfaces
Size
1
1
2
1
Value
09h
02h
yyyyh
01h
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.
DS00001691B-page 50
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