Datasheet

Product Description
31
1.10 Audio Subsystem
The audio subsystem consists of the following devices:
• Intel 82801DB I/O Controller Hub (ICH4)
• Realtek ALC202A audio codec
The audio subsystem includes these features:
• Signal-to-noise ratio ≥ 90 dB
• Supports wake events (driver dependent)
• Mic in pre-amp that supports dynamic, condenser, and electret microphones
The audio subsystem supports the following audio interfaces:
• ATAPI-style connectors:
 Auxiliary line in
 CD-ROM
• Front panel audio connector, including pins for:
 Line out
 Mic in
• Back panel audio connectors:
 Line out
 Line in
 Mic in
1.10.1 Audio Connectors
1.10.1.1 Front Panel Audio Connector
A 2 x 5-pin connector provides mic in and line out signals for front panel audio connectors.
For information about Refer to
The location of the connector Figure 5, page 50
The signal names of the front panel audio connector Table 21, page 51
Obtaining the Front Panel I/O Connectivity Design Guide Section 1.5, page 17
✏
NOTE
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 58 for more information.
1.10.1.2 Auxiliary Line In Connector
A 1 x 4-pin ATAPI-style connector connects the left and right channel signals of an internal audio
device to the audio subsystem.
For information about Refer to
The location of the auxiliary line in connector Figure 5, page 50
The signal names of the auxiliary line in connector Table 22, page 51