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CX-MB-EVA2 User's Manual Hardware
29
4.9 Audio
An AC’97 codec V2.2 is connected to the AC link of the COM Express module. Footprint
and circuit are compatible to following AC’97 codecs:
VIA VT1612A
Realtek ALC650
Following LF signals are provided by the AC’97 codec:
Mono Microphone
Stereo LineIn
Stereo LineOut
Stereo Headphone
Alternatively a VIA VT1708 HDA codec can be connected to the AC link of the COM
Express module. The audio interface can be selected with Jumper J0701.
Following LF signals are provided by the HDA codec:
Stereo LineIn
Stereo LineOut
Stereo Microfon
Mono Center / Mono LFE
Stereo Surround
Stereo Side
4.9.1 AC'97 codec
4.9.1.1 Mono-Microphone
Bias voltage for capacitor microphones is provided.
Specification:
References: X18
Connector: Kycon ST-3000Mono-Microphone
Pinout: Refer to Table 8
Pin
Signal name
Function
1
GND
Ground
2
MIC_BIAS
Bias initial load (ring)
3
MIC
NF signal (tip)
Table 13 Pinout Microphone
- 2014-08-21 1
- Preface 2
- Content 3
- Illustrations 5
- 1 General Information 7
- 2 Introduction 9
- 2.3 Block Diagram 11
- 3 Mechanics 13
- 4 Hardware 14
- 4.2 PCI Slots 19
- 4.3 PCI Express x1 Slots 21
- 4.5 VGA Interface 24
- 4.6 LVDS-Interface 25
- 4.7 JILI Interface 27
- 4.8 TV Out 28
- 4.9 Audio 29
- 4.10 IDE Interface 31
- 4.11 SATA-Interface 32
- 4.12 USB Topology 33
- 4.13 Ethernet 34
- 4.14 LPC Slot 34
- 4.15 I/O Connector 35
- 4.16 GPIO 36
- 4.17 ATX Connector 36
- 4.18 SuperIO 37
- 4.18.2 IrDA 38
- 4.18.3 PS/2 38
- 4.18.4 Fan interface 39
- 4.18.5 Intel Fan interface 39
- 4.19 SMB Hardware Monitor 40
- 4.20 Serial EEPROM on SMBus 40
- 4.22 OnBoard BIOS-Flash 41
- 4.23 POST-Code Display 41
- 4.24 Battery 42
- 4.25 Beeper 42
- 4.26 Power Button 42
- 4.27 Reset Button 42
- 4.28 Miscellaneous 43
- 4.29 Jumper settings 44
- DIP-switch settings 46
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