Audio Subsystem; Audio Subsystem Block Diagram - Intel D845GEBV2 - OCTOBRE 2002 Manual

1.10 Audio Subsystem

The audio subsystem consists of the following devices:
•
Intel 82801DB I/O Controller Hub (ICH4)
•
Analog Devices AD1981B audio codec
The audio subsystem includes these features:
• Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB
•
Power management support for ACPI 2.0 (driver dependant)
•
Mono/Stereo 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 (mono or stereo)
•
Back panel audio connectors:
 Line out
 Line in
 Mic in (mono or stereo)
Figure 8 is a block diagram of the audio subsystem.
I/O Controller Hub
For information about
Upgrading the onboard audio subsystem using a CNR audio card
The front panel audio connector
The back panel audio connectors
82801DB
AC '97
Link
(ICH4)
Figure 8. Audio Subsystem Block Diagram
Line In
Line Out
AD1981B
Mic In
Audio Codec
Auxiliary Line In
CD-ROM
Refer to
Section 1.12, page 40
Section 2.8.2.2, page 62
Section 2.8.1, page 60
Product Description
OM15116
37