Only For Training And Service Purposes - LG GM200 Service Manual

3. TECHNICAL BRIEF
Figure 3-2-3 AD6725-ATLAS3HLITEABB Internal Audio Block Diagram
The AD6725-ATLAS3H LITE Audio Section supports communications and personal audio applications.
The Audio Section provides an audio codec with two digital-to-analog converters and an analog-to-
digital converter, a microphone interface, and analog input and output channels.
Audio Serial Ports
The AD6725-ATLAS3H LITE Audio Serial Port is described in detail in the Audio Serial Port (ASPORT)
section below.
Audio Codec
The AD6725-ATLAS3H LITE audio codec supports communications applications with digital sample rates
of 8 kHz or 16kHz. DAC 1 is used for receiving speech. An ADC is used for sending speech. The AD6725-
ATLAS3HLITE audio codec supports personal audio applications with digital sample rates of 8 kHz,
11.025kHz, 12 kHz, 16 kHz, 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, or 48 kHz. DAC 1 and DAC 2 are used for
monophonic audio. The channels are common in the digital section. DAC 1 and DAC 2 are used together
for stereo audio, with DAC 1 decoding the left-channel digital input and DAC 2 decoding the right-
channel digital input.
LGE Internal Use Only
LGE Internal Use Only - 34 - Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes