Filter
Top Products
8050
8050
D N/B Maintenance
D N/B Maintenance
20
Supports socket activity LED
Supports 12 GPIOs and GPE#
Supports PCI LOCK
The ALC655 is a 16-bit, full duplex AC'97 2.3 compatible six channels audio CODEC designed for PC
multimedia systems,including host/soft audio and AMR/CNR based designs. The ALC655 incorporates
proprietary converter technology to meet performance requirements on PC99/2001 systems. The ALC655
CODEC provides three pairs of stereo outputs with 5-Bitvolume 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 ALC655 CODEC operates from a 3.3V power supply for use in
notebook and PC applications. The ALC655 integrates 50mW/20ohm headset audio amplifiers at Front-Out and
Surr-Out, built-in 14.318M 24.576MHz PLL and PCBEEP generator, those can save BOM costs. The
ALC655also supports the S/PDIF input and output function, which can offer easy connection of PCs to consumer
electronic products, such as AC3 decoder/speaker and mini disk devices. ALC655 supports host/soft audio from
Intel ICHx chipsets as well as audio controller based VIA/SIS/ALI/AMD/nVIDIA/ATI chipset. Bundled
Windows series drivers (Win XP/ME/2000/98/NT), EAX/Direct Sound 3D/ I3DL2/ A3D compatible sound effect
utilities (supporting Karaoke, 26-kind of environment sound emulation,10-band equalizer), HRTF 3D positional
audio and Sensaura™ 3D (optional) provide an excellent entertainment package and game experience for PC users.
Besides, ALC655 includes Realtek’s impedance sensing techniques that makes device load on outputs and inputs
can be detected.
1.3.7 AC’97 AUDIO SYSTEM: Advance Logic, Inc, ALC655
MiTac Secret
Confidential Document