參數(shù)資料
型號(hào): CM108
廠商: C-Media Electronics Inc.
英文描述: USB Audio I/O Controller
中文描述: USB音頻I / O控制器
文件頁(yè)數(shù): 7/29頁(yè)
文件大?。?/td> 514K
代理商: CM108
CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
Date: Nov/01/2004
Version: 1.5
- 14 -
7.1.2 Configuration Descriptor
Offset
Field
Size
Value
(Hex)
Description
0
bLength
1
09
Total 9 Bytes
1
bDescriptorType
1
02
Configuration Descriptor
2
wTotalLength
2
Total length of data returned for this
configuration.
Programmable by MSEL and MODE pin
4
bNumInterfaces
1
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
5
bConfigurationValue
1
01
6
iConfiguration
1
00
7
bmAttributes
1
A0 or E0 Programmable by PWRSEL
8
bMaxPower
2
32 or FA Maximum power consumption of the
USB. Programmable by MODE and
PWRSEL Pin
7.1.3 Content Format for EEPROM (93C46)
id code 2 bytes
P ID 2 bytes
serial num ber
6 bytes
unused
address = 0
1W = 2B ytes
V ID 2 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
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