CM108AH Datasheet, PDF (13/27 Pages) C-Media Electronics – Highly Integrated USB Audio I/O Controller

CM108AH
Highly Integrated USB Audio I/O Controller
7.1.3 Content Format for EEPROM (93C46)
Addr
(Dec)
0
1
2
3
4
~
9
10
11
~
25
26
27
~
41
42
Addr
(Hex)
0x00
0x01
0x02
0x03
0x04
~
0x09
0x0A
0x0B
~
0x19
0x1A
0x1B
~
0x29
0x2A
Description
Magic Word
0x670X
where X = bit 4, 3, 2, 1
bit 3, value within address 0x2A,0x2B is valid 1: valid 0: invalid
bit 2, manufacture string enable 1: enable(default) 0: disable
bit 1, serial number enable control 1: enable 0: disable(default)
bit 0, product string enable control 1: enable(default) 0: disable
VID 2-byte
PID 2-byte
Serial number length (low byte)
Serial number first byte (high byte)
Serial number: 12 bytes
Product string length (low byte)
Product string first byte (high byte)
Product string: 30 bytes (default: USB PnP sound device)
Manufacturer string length
(low byte)
Manufacturer string first byte^t
(high byte)
Manufacturer string: 30 bytes (default: C-Media Electronics Inc.)
bit 15 ~ 8
bit 7 ~ 0
DAC initial volume (7-bit) max: 0x02
ADC initial volume (5-bit) max: 0x00
min: 0x4a
min: 0x78
bit 15 ~ bit 9 <reserved>
bit 8
Shutdown DAC analog - 1: shutdown, 0: active (default)
bit 7
Total power control - 1: enable, 0: disable (default)
bit 6
Reserved, should be 0
bit 5
MIC high pass filter - 1: enable (default), 0: disable
43
0x2B ^{bit 4}
bit 3
ADC synchronization mode - 1: enable, 0: disable (default)
MIC BOOST - 1: enable (default), 0: disable
bit 2
DAC output terminal property set to SPK or HP
1: Headset, 0: Speaker (default)
bit 1
HID - 1: enable (default), 0: disable
bit 0
Remote wakeup enable/disable
1: enable, 0: disable (default)
44
0x2C
~
~
<reserved>
END
END
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.
Rev. 2.1︱ Page 13/27