FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 41
FW82801DBM S L6DN
Manufacturer Part Number
FW82801DBM S L6DN
Description
Manufacturer
Intel
Datasheet
1.FW82801DBM_S_L6DN.pdf
(615 pages)
Specifications of FW82801DBM S L6DN
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Introduction
AC ’97 2.3 Controller
The Audio Codec ’97, Revision 2.3 specification defines a digital interface that can be used to
attach an audio codec (AC), a modem codec (MC), an audio/modem codec (AMC) or a
combination of ACs and MC. The AC ’97 specification defines the interface between the system
logic and the audio or modem codec, known as the AC ’97 Digital Link.
By using an audio codec, the AC ’97 digital link allows for cost-effective, high-quality, integrated
audio on Intel’s chipset-based platform. In addition, an AC ’97 soft modem can be implemented
with the use of a modem codec. Several system options exist when implementing AC ’97. The
ICH4-integrated digital link allows several external codecs to be connected to the ICH4. The
system designer can provide audio with an audio codec, a modem with a modem codec, or an
integrated audio/modem codec. The digital link is expanded to support three audio codecs or two
audio codecs and one modem codec.
The modem implementations for different countries must be taken into consideration, because
telephone systems may vary. By using a split design, the audio codecs can be on-board and the
modem codec can be placed on a riser.
The digital link in the ICH4 supports the Audio Codec ’97, Revision 2.3 specification, so it
supports three codecs with independent PCI functions for audio and modem. Microphone input and
left and right audio channels are supported for a high quality, two-speaker audio solution. Wake on
Ring from Suspend also is supported with the appropriate modem codec.
The ICH4 expands the audio capability with support for up to six channels of PCM audio output
(full AC3 decode). Six-channel audio consists of Front Left, Front Right, Back Left, Back Right,
Center, and Subwoofer for a complete surround-sound effect. ICH4 has expanded support for three
audio codecs on the AC ’97 digital link.
®
Intel
82801DBM ICH4-M Datasheet
41
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