56
2 System Board
The Input/Output Controller Hub (82801AA)
Dual Chip PCI Audio Solution
The integrated PCI audio solution in the PC Workstation is a dual-chip
solution made up of the CrystalClear
™
CS4280 PCI audio controller and the
CrystalClear CS4297 Audio Codec ‘97 (AC’97).
The CS4280 PCI audio controller interfaces with the PCI bus and performs
all digital operations such as sample rate conversions and synthesis. The
CS4297 AC’97 chip mixes and processes all the analog signals.
The interface between audio PCI chip and the audio codec is known as the
AC’97 Digital Link.
CS4280 PCI Audio
Interface Features
•
PCI Version 2.1 Bus Master
.
•
Windows
®
95, Windows 98, Windows NT 4.0, Windows NT 2000 Drivers.
•
Compliant with PC’99.
•
MPU-401 interface, FM synthesizer, and Game Port.
•
Full duplex operation.
•
Advanced Power Management (PPMI).
CS4297 Audio Codec‘97
Features
•
AC’97 1.03 compatibility.
•
Sophisticated mixed signal technology.
•
18-bit stereo full-duplex Codec with fixed 48kHz sampling rate.
•
High quality differential CD input.
•
Mono microphone input.
•
Two analog line-level stereo inputs for LINE IN and CD (or VIDEO)
connection.
•
Single stereo line level output.
•
Extensive power management support.
•
Meets Microsoft’s PC’99 audio performance requirements
.
