MiTAC E-8590 - Page 54

53
LCD PC E
LCD PC E
-
-
8590 MAINTENANCE
8590 MAINTENANCE
1.2.9 AC’97 Audio System: Realtek ALC202
The ALC202/ALC202A 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. The ALC202 incorporates proprietary
converter technology to achieve a high SNR, greater than 90 dB. The ALC202 AC'97 CODEC supports multiple
CODEC extensions with independent variable sampling rates and built-in 3D effects. The ALC202 CODEC
provides two pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono
inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs.
The digital interface circuitry of the ALC202 CODEC operates from a 5V/3.3V power supply with EAPD (External
Amplifier Power Down) control for use in notebook and PC applications. The ALC202 integrates a 50mW/8.
headset audio amplifier into the CODEC, saving BOM costs. The ALC202 also supports the SPDIF out function,
which is compliant to AC'97 2.2, which can offer easy connection of PCs to consumer electronic products, such as
AC3 decoder/speaker and mini disk devices. The ALC202 CODEC supports host/soft audio from Intel
810/815/820/845 chipsets as well as audio controller based VIA/SIS/ALI chipsets. Bundled Windows series drivers
(Win95/98/ME/2000/XP/NT) and sound effect utilities (supporting Karaoke, 26-kind of environment sound
emulation, 10-band equalizer) provide an excellent entertainment package for PC users. Finally, internal PLL
circuits generate required timing signals, eliminating the need for external clocking devices.
Features
Single chip audio CODEC with high S/N ratio (>90dB)
Compliant with AC’97 2.2 & WHQL specifications
Support of S/PDIF out is compliant with AC’97 rev2.2 specifications
Meets performance requirements for audio on PC2001 systems