Owners manual

System
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 265
4.21. Audio Codec
4.21.1. Overview
The embedded Audio Codec is a high-quality stereo audio codec designed for embed device. It provides a stereo DAC
for playback, and a stereo ADC for recording.
The features of Audio Codec:
 Two audio digital-to-analog(DAC) channels
 Support analog/ digital volume control
 One low-noise analog microphone bias output
 Analog low-power loop from line-in /microphone to lineout outputs
 Support Dynamic Range Controller adjusting the DAC playback output
 Three audio inputs:
- Two differential microphone inputs
- Stereo line-in input
 Two audio analog-to-digital(ADC) channels
- 92dB SNR@A-weight
- Supports ADC Sample Rates from 8KHz to 48KHz
 Support Automatic Gain Control(AGC) and Dynamic Range Control(DRC) adjusting the ADC recording output
 Interrupt and DMA Support
4.21.2. Power and Signal Description
4.21.2.1. Analog I/O Pins
Signal Name
Type
Description
MIC1P
I
First microphone positive input
MIC1N
I
First microphone negative input
MIC2P
I
Second microphone positive input
MIC2N
I
Second microphone negative input
LINEINL
I
Line in left input
LINEINR
I
Line in right input
LINEOUTL
O
Line out left output
LINEOUTR
O
Line out right output
confidential