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3.15 Audio Interface
The AD6855 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 and Music Serial Ports
The AD6855 Audio Serial Port is described in detail in the Audio Serial Port (ASPORT) section below.
AD6855 Music serial port (MSPORT) is described in detail in the Music Serial Port (MSPORT) section
below.
Audio Codec
The AD6855 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 AD6855 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.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-15-1 ABB Internal Audio Block Diagram
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3. TECHNICAL BRIEF
LGE Internal Use Only
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