PS/2 PORTS
The two PS/2 ports allow the user
to connect legacy PS/2 devices to
the USB host system. Standard
104-key keyboards and PS/2 mice,
with support for MouseWheel
functionality, can be hot-plugged at
either of the PS/2 ports and
immediately begin communicating
with the host.
USB DESCRIPTORS
Offset Field
Device Descriptor
0
bLength
1
bDescriptorType
2
bcdUSB
4
bDeviceClass
5
bDeviceSubClass
6
bDeviceProtocol
7
bMaxPacketSize0
8
idVendor
10
idProduct
12
bcdDevice
14
iManufacturer
15
iProduct
16
iSerialNumber
17
bNumConfigurations
Configuration Descriptor
0
bLength
1
bDescriptorType
2
bTotalLength
4
bNumInterfaces
5
bConfigurationValue
6
iConfiguration
7
bmAttributes
8
MaxPower
String Descriptor
0
bLength
1
bDescriptorType
2
bString
4
bLength
5
bDescriptionType
6
bString
30
bLength
31
bDescriptorType
32
bString
Size
1
1
2
1
1
1
1
2
2
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
24
1
1
40
Value Description
12
01
0101
00
00
00
08
047A
0101
0100
04
1E
00
01
Descriptor length (18 bytes)
Descriptor type
USB release
Specified in interfaces
Specified in interfaces
No protocols on the device basis
Maximum packet length (bytes) for
endpoint 0 is 8
Vendor ID (USAR)
Product ID
Firmware revision 1.0
Index for manufacturer string
descriptor
Index for product string descriptor
Index for serial number string
descriptor
Number of configurations
09
02
003B
02
01
00
A0
32
Configuration Descriptor length
Configuration Descriptor
Total length of descriptors returned
with this one
Number of interfaces supported
Value associated with this configuration
Index for configuration string
descriptor – none
Configuration Characteristics
Bit 7: Reserved (set to one) 1
Bit 6: Self-powered 0
Bit 5: Remote wake-up 1
Maximum Power consumed is 100 mA
04
03
0904
1A
03
2A
03
Length of language ID
Descriptor type (=String)
Array of Language ID code (=English)
Length of Manufacture String
Descriptor Type (=String)
Manufacturer name
Length of product string
Descriptor Type (= String)
Geni PS2 Product Name
Copyright ©1999-2001 Semtech Corporation
4
DOC3-GNP-001-DS-104
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