Owners manual

System
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 313
Bit
R/W
Default/Hex
Description
7:6
R/W
0x1
OPMIC_BIAS_CUR
OPMIC Bias Current Control
5:4
/
/
/
3:2
R/W
0x1
OPDAC_BIAS_CUR.
OPDAC Bias Current Control
1:0
R/W
0x1
OPMIX_BIAS_CUR.
OPMIX/OPLPF Bias Current Control
4.21.6.18. 0x12 ADDA Analog Performance Turning 2 Register(Default Value: 0x42)
Offset:0x12
Register Name: ADDA_APT2
Bit
R/W
Default/Hex
Description
7
R/W
0x0
function enable for master volume change at zero cross over
0: disable; 1: enable
6
R/W
0x1
Timeout control for master volume change at zero cross over
0: 32ms; 1: 64ms
5:4
R/W
0x0
PTDBS
HPCOM protect de-bounce time setting
00: 2-3ms; 01: 4-6ms; 10: 8-12ms; 11: 16-24ms
at the same time, bit 17 is used to control the AVCCPORFLAG, write 1 to this bit,
flag will be clear, and the calibration is done again
3
R/W
0x0
PA_SLOPE_SELECT
PA slope select cosine or ramp
0: select cosine
1: select ramp
2:0
R/W
0x2
USB_BIAS_CUR.
USB bias current tuning
From 23uA to 30uA, Default is 25uA
4.21.6.19. 0x13 Bias & DA16 Calibration Control Register0(Default Value: 0xD6)
Offset:0x13
Register Name: Bias_DA16_CAL_CTR0
Bit
R/W
Default/Hex
Description
7
R/W
0x1
MMIC BIAS chopper enable
0: disable; 1:enable
6:5
R/W
0x2
MMIC BIAS chopper clock select
00: 250KHz; 01: 500KHz; 10: 1MHz; 11: 2MHz
4
R/W
0x1
DITHER
ADC dither on/off control
0: dither off; 1: dither on
3:2
R/W
0x1
DITHER_CLK_SELECT
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