Table of Contents
Advertisement
3. TECHNICAL BRIEF
3.13 Audio Front-End
3.13.1 General Description
The audio front-end essentially consists of voice and audio data paths. Figure 3.13.1 shows the block
diagram of the audio front-end. All voice band data paths comply with the GSM 03.50 specification. Mono
hands-free audio or external FM radio playback paths are also provided. The audio stereo path facilitates CD-
quality playback, external FM radio, and voice playback through a headset.
Figure 3.13.2 shows the digital circuits block diagram of the audio front-end. The APB register block is an
APB peripheral that stores settings from the MCU. The DSP audio port (DAP) block interfaces with the DSP
for control and data communications. The digital filter block performs filter operations for voice band and
audio band signal processing. The Digital Audio Interface (DAI) block communicates with the System
Simulator for FTA or external Bluetooth modules.
LGE Internal Use Only
Figure 3.13.1 Block diagram of audio front end
51/140
- 50 -
3. TECHNICAL BRIEF
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Advertisement
Table of Contents
