net2890 ETC-unknow, net2890 Datasheet - Page 58

• Manufacturer Part Number: net2890
• Description: Interface Controller
• Manufacturer: ETC-unknow

Specification
6.1.5 Get Configuration Descriptor (55 bytes)
The NET2890 can support a variety of configurations, interfaces, and endpoints, each of which is defined
by the descriptor data returned to the host. The local CPU has the responsibility of providing this data to
the NET2890 when the host requests it.
This example has one configuration, and two interfaces, each with two endpoints. The first interface defines
one Bulk OUT endpoint at address 1 with maximum packet size of 8 and one Interrupt IN endpoint at
address 82h (endpoint number = 2) with a maximum packet size of 8. The second interface defines one
Bulk OUT endpoint at address 3 with maximum packet size of 64 and one Bulk IN endpoint at address 84h
(endpoint number = 4) with a maximum packet size of 64.
Note that all interface and endpoint descriptors are returned in response to a Get Configuration Descriptor
request.
Offset
Configuration Descriptor
Interface 0 Descriptor
____________________________________________________________________________________
0
1
2
4
5
6
7
8
0
1
2
3
4
5
6
7
8
Number of
Bytes
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Length
Type (configuration)
Total length returned for this configuration
Number of Interfaces
Number of this configuration
Index of string descriptor describing this configuration
Attributes
bit 7 = Bus Powered
bit 6 = Self-Powered
bit 5 = Remote-Wakeup
bits 4:0 = Reserved
Maximum USB power required (in 2 mA units)
Size of this descriptor in bytes
Type (interface)
Number of this interface
Alternate Interface
Number of endpoints used by this interface
(excluding Endpoint 0)
Class Code
Sub Class Code
Device Protocol
Index of string descriptor describing this interface
335 Pioneer Way, Mountain View, California 94041
TEL [phone] FAX [phone]
NetChip Technology, Inc., 1999
Rev 2.0, Draft 9, July 16, 1999
http://www.netchip.com
Description
NET2890 USB Interface Controller
Suggested
Value
0037h
02h
00h
09h
02h
02h
01h
00h
09h
04h
00h
00h
00h
00h
00h
58