User`s manual

Driver Setup
4-7
Realtek ALC201A Audio Driver
The ALC201A is an 18-bit, full duplex AC'97 2.2 compatible stereo audio CODEC
designed for PC multimedia systems, including host/soft audio and AMR/
CNR based designs. ALC201A AC'97 CODEC incorporates proprietary con-
verter technology to achieve high SNR greater than 90 dB. In addition, it sup-
ports multiple CODEC extension with independent variable sampling rate and
built-in 3D effects. It also provides two pairs of stereo outputs with independ-
ent volume controls, a mono output, and multiple stereo and mono inputs,
along with flexible mixing, gain and mute functions to provide a completely
integrated audio solution for PCs.
Features
• AC'97 2.2 Compatible & WHQL Compliant
• High Performance Converter Technology
• 18-bit Stereo Full-Duplex CODEC with Independent Variable Sampling
Rate
• Four Analog Line-Level Stereo Inputs for Connection from LINE, CD,
VIDEO and AUX
• Two Analog Line-Level Stereo Inputs for Speakerphone and PC BEEP
• Two MIC Inputs w/ Software Selectable
• High Quality Differential CD Input
• True Stereo Line Level Outputs
• EAPD (External Amplifier Power Down) Control
• 3D Stereo Enhancement
• Multi-CODEC Extension
• SNR Greater Than 95 dB
• Line Output with 50mW/20ohm Driving Capability
• Headphone Jack-Detection to Mute LINE Output
• MC'97 Chain-In Allows for Multi-Channel Application
• Supports SPDIF-Out, Fully Compliant to AC'97 Specification Rev. 2.2
• Power Management Support
• Power Supply (Digital 3.3V/ Analog 5V)
• Meets Microsoft PC99 & WLP 2.0 Audio Requirements
48-Pin LQFP Package