Allwinner A20 - Page 185

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 185 / 812
Offset:0x28
Register Name: AC_PA_ADC_ACTRL
Bit
R/W
Default
Description
Line-in pre-amplifier Gain Control
From -12dB to 9dB, 3dB/step, default is 0dB
12
/
/
/
11
R/W
0
LHPOUTN
Left Headphone Amplifier Output Negative To Right HPOUT Mute
0: mute
1: Not-mute
10
R/W
0
RHPOUTN
Right Headphone Amplifier Output Negative To Left HPOUT Mute
0: mute
1: Not-mute
9
/
/
/
8
R/W
0x1
DITHER.
ADC dither on/off control
0: dither off
1: dither on
7:6
R/W
0x1
DITHER_CLK_SELECT.
ADC dither clock select
00: about 43KHz
01: about 51KHz
10: about 64KHz
11: about 85KHz
5
/
/
/
4
R/W
0x0
PA_EN.
PA Enable
0-disable
1-enable
3
R/W
0x1
DDE.
Headphone direct-drive enable, (DDE):
0-disable
1-enable
2
R/W
0x1
COMPTEN.
HPCOM output protection enable
0: protection disable
1: protection enable