Only For Training And Service Purposes - LG KG290 Service Manual

• Audio section
This section supports communications and personal audio applications. The audio section provides
an audio codec with two digital-to-analog converts and an analog-todigital converter, a ring tone
volume controller, a microphone interface, and analog input and output channels.
♦ Audio Codec
The AD6852 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 AD6852 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 rightchannel digital input. Audio codec operating modes can be controlled by writing
5 bit codes in the AudMode field of the AudControl1 register and in the AudMode field of the
AudControl4 register. AudControl1 programs the sampling rate and stereo or monophonic
operating mode for PCM audio samples input via the ASPORT.
AudControl4 programs the sampling rate and stereo or monophonic operating mode for PCM
audio samples input via the MSPORT. Receive audio signal from MIC. LG-G832 is used
differential configuration. Send audio signal to Receiver. LG-G832 is used differential configuration.
It is interconnected with external device like main microphone, main receiver, speaker and headset
through the AIN1P, AIN1N, AOUT1P, AOUT1N, , AOUT2P1/2, AOUT2N1/2, AIN2P, AIN2N,
AOUT3R, AOUT3L.
AIN1P, AIN1N : Main MIC positive/negative terminal AOUT1P, AOUT1N : Main Receiver
positive/negative terminal. AOUAOUT1N goes to main receiver through the SPDT AOUT2P1/2,
AOUT2N1/2: Main Speaker positive/negative terminal. AOUT2P1/2, AOUT2N1/2 go to speaker
through WM8951 and SPDT.
AIN2P, AIN2N : Headset MIC positive/negative terminal.
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

3. TECHNICAL BRIEF
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LGE Internal Use Only