CM109 Datasheet, PDF (13/36 Pages) C-Media Electronics – USB I/O Controller

CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
7.1.2 Configuration Descriptor
Offset
0
1
2
Field
bLength
bDescriptorType
wTotalLength
4
bNumInterfaces
5 bConfigurationValue
6
iConfiguration
7
bmAttributes
8
bMaxPower
Size
1
1
2
1
1
1
1
2
Value
(Hex)
Description
09 Total 9 Bytes
02 Configuration Descriptor
Total length of data returned for
this configuration
Programmable by MSEL and
MODE pin
04 or 03 Number of interfaces supported
by this Configuration
(Decided by Speaker Mode and
Head Set mode):
0: control interface
1: ISO-OUT interface
2: ISO-IN interface (Option)
3: INT-IN(HID) interface
01
00
A0 or E0 Programmable by PWRSEL
32 or FA Maximum power consumption of
the USB
Programmable by MODE and
PWRSEL
7.1.3 Content Format for 93C46
1W = 2Bytes
id code 2 bytes
VID 2 bytes
PID 2 bytes
serial num ber
6 bytes
670X
where X = bit 4, 3, 2, 1
bit 2 serial num ber enable control 1: enable 0: disable
bit 1 product string enable control 1: enable 0: disable
address = 0
unused
Date: 08/Sep/2005
Content Format for 93C46
- 12 -
Version: 1.3a