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AS3543 Datasheet(PDF) 27 Page - ams AG

Part # AS3543
Description  High End Stereo Audio Codec wi th System PMU
Download  92 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3543 Datasheet(HTML) 27 Page - ams AG

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Revision 1.11
26 - 91
AS3543 3v2
Data Sheet - D e t a i l e d D e s c r i p t i o n - A u d i o F u n c t i o n s
8.5.7
Register Description
DAC and ADC have to be enabled in register 14h first before other settings in register 0Eh to 11h can be programmed.
8.6
Audio Output Mixer
8.6.1
General
The mixer stage sums up the audio signals of the following stages
Microphone Input 1
Line Input 1/2
DAC Output
ADC Input
The mixing ratios have to be set within the volume registers of the corresponding input stages. Please be sure that the
peak voltage of input signals for the mixer stage is less than AVDD17/3. If summing up several signals, each individual
signal has of course to be accordingly lower. This shall insure that the output signal is also not higher than AVDD17/3
peak to get a proper signal for the output amplifier.
This stage features an automatic gain control (AGC), which automatically avoids clipping.
8.6.2
Register Description
Table 16. Audio Converter Related Register
Name
Base
Offset
Description
DAC_R
2-wire serial
0Eh
DAC input volume settings
DAC_L
2-wire serial
0Fh
DAC input volume settings
ADC_R
2-wire serial
10h
ADC output volume settings, source multiplexer settings
ADC_L
2-wire serial
11h
ADC output volume settings, sampling rate settings
DAC_IF
2-wire serial
11h
DAC input digital volume settings
AudioSet1
2-wire serial
14h
Enable/disable DAC, DAC gain stage & ADC
AudioSet3
2-wire serial
16h
Enable/disable mixer input
Out_Cntr3
2-wire serial
1A-3h
Control of SDO signal and drive
PLL
2-wire serial
1A-7h
PLL sample rate settings
PMU_Enable
2-wire serial
1Ch
Enables writings to extended registers 1Ah-3 and 1Ah-7
IRQENRD_1
2-wire serial
25h
Interrupt settings for LRCK changes
Table 17. Audio Mixer Related Register
Name
Base
Offset
Description
AudioSet2
2-wire serial
15h
Enable/disable mixer stage and AGC
AudioSet3
2-wire serial
16h
Enable/disable DAC, MIC or Line Inputs to mixer stage


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