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3. TECHNICAL BRIEF
3.13 Audio Interface
The AD6725 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 AD6725 Audio Serial Port is described in detail in the Audio Serial Port (ASPORT) section below.
AD6725 Music serial port (MSPORT) is described in detail in the Music Serial Port (MSPORT) section below.
Audio Codec
The AD6725 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 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
Figure 3-13-1 ABB Internal Audio Block Diagram
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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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