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AS3525 Datasheet(PDF) 147 Page - ams AG |
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AS3525 Datasheet(HTML) 147 Page - ams AG |
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147 / 194 page  AS3525-A/-B C22O22 Data Sheet, Confidential © 2005-2009, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved. www.austriamicrosystems.com Revision 1.13 147 - 194 7.4.11 Audio Output Mixer 7.4.11.1 General The mixer stage sums up the audio signals of the following stages • Microphone Input 1 • Microphone Input 2 • Line Input 1 • Line Input 2 • Digital Audio Input (DAC) The mixing ratios have to be with the volume registers of the corresponding input stages. Please be sure that the input signals of the mixer stage are not higher than 1Vp. 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 1Vp to get a proper signal for the output amplifier. This stage features an automatic gain control (AGC), which automatically avoids clipping. 7.4.11.2 Register Description Audio Mixer Related Register Name Base Offset Description AudioSet_1 I2C audio master 0x14 Enable/disable mixer stage AudioSet_2 I2C audio master 0x15 Enable/disable AGC The mixer stage has no dedicated registers. |
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