CM108 Datasheet, PDF (15/29 Pages) C-Media Electronics – USB Audio I/O Controller

CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
7.1.2 Configuration Descriptor
Offset
Field
0
bLength
1
bDescriptorType
2
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, Changed by MODE pin.
EP0: Control Interface
EP1: ISO-OUT Interface
EP2: ISO-IN Interface (Optional)
EP3: 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 Pin
7.1.3 Content Format for EEPROM (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: Nov/01/2004
- 14 -
Version: 1.5