Alcor AU9440, Technical Reference Manual, Page: 16 / 30

SYSTEM ARCHITECTURE AND REFERENCE DESIGN 12
16 4C,52 LoByte : Pointer to string descriptor (index 1) 100h ROM
address
HiByte : Xfer end a 1
18 52,6A LoByte : Pointer to string descriptor (index 2) 100h ROM
address
HiByte : Xfer end a 1
1A 6A,82 LoByte : Pointer to string descriptor (index 3) 100h ROM
address
HiByte : Xfer end a 1
1C 09,02,19,00,01,01,00,A0,19 RESERVED
Config Desc. 1 interface, bus powered, remote wakeup, 50 mA
Total bytes returned : 0x19
25 09,04,00,00,01,09,00,00,00 RESERVED
Hub interface descriptor, interface 0. Class code 0x9
2E 07,05,81,03,01,00,FF RESERVED
Hub endpoint descriptor
35 09,02,3B,00,02,01,00,A0,19 Keybrd Config Desc. 2 interfaces, bus powered, remote wakeup, 50
mA
Total bytes returned : 0x3B
3E 09,04,00,00,01,03,01,01,00 Keyboard interface descriptor, interface 0. Class code 0x3.Boot
subclass
47 09,21,10,01, 00 ,01,22,41,00 Keyboard HID 1.1 descriptor, Country code=00 ANSI
50 07,05,81,03,08,00,0A Keyboard endpoint descriptor
57 09,04,01,00,01,03,00,00,00 Added Key interface descriptor, interface 1. Class code 0x3. No
subclass
60 09,21,10,01, 00 ,01,22, 6A ,00 Added Key HID 1.1 descriptor, Country code=00 ANSI
69 07,05,82,03,04,00,FF Added Key endpoint descriptor
70 05,01,09,06,A1,01,05,07,
19,E0,29,E7,15,00,25,01,
75,01,95,08,81,02,95,01,
75,08,81,01,95,05,75,01,
05,08,19,01,29,05,91,02,
95,01,75,03,91,01,95,06,
75,08,15,00,26,FF,00,05,
07,19,00,2A,FF,00,81,00,
C0
Keyboard report descriptor
B1 12,01,10,01,09,00,00,08,
8F,05,40,94, 22,01, 01,02,
00,01
RESERVED
Hub device descriptor
, USB version 1. 1, VID,PID
Device version 1.22
12 Descriptor length
01 Device Descriptor
10 01 USB Version 1.1
09 Hub class
00 Sub-class
00 Device Protocol
08 Maximum packet size
VV VV Vender ID –
Alcor Hub Vender ID
PP PP Product ID - Alcor Hub Product ID
22 01 Device release number
01 Index of Manufacturer string descriptor
02 Index of Product string descriptor
00 Index of serial number string descriptor – no serial number
01 Number of configuration
C3 09,29,03,04,00,16,32,02,FF RESERVED
Hub class descriptor.