Only For Training And Service Purposes - LG KC910 Service Manual

3. TECHNICAL BRIEF
3.13.6 Audio Interface
In this configuration ZR345X is connected to an external audio codec.
There are three possible configurations:
• Audio/Voice codec with two ports: PCM and I2S
• Audio/Voice codec with one port: I2S
• Audio/voice/data codec with one port: AC97
In all configurations ZR345X connects its external audio ports to the codec single or two ports.
The host uses its internal voice codec for voice communication. There is no bypass of voice.
The host controls the codec configuration via I2C bus directly. The host codec analog audio output is
connected to the external audio codec and muxed with the codec audio path from the ZR345X on the
way is to the speaker.
The microphone is connected to the external audio codec and the baseband internal codec.
ZR345X appears in Figure 3-35 as a master on the bit clock and frame sync. This is only one of the
possible configurations.
In external audio configuration ZR345X can run all the Audio/voice applications including conversation
recording .
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Only for training and service purposes