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数据搜索系统，热门电子元器件搜索 |
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STA321MPL1 数据表(PDF) 16 Page - STMicroelectronics |
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STA321MPL1 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 80 page  Microphone interface STA321MPL1 16/80 DocID029389 Rev 1 3.5 Sensitivity adjustment The sensitivity adjustment control can be used to compensate the differences between theoretical and real sensitivity. It is applied to all membranes of the microphone. Sensitivity adjustment = [-4, 3.875) with a 0.125 dB step Configuration registers: 0x5F(5-0), 0x60(5-0), 0x61(5-0) 3.6 Normal channel attenuation The NORM_Att is a parameter which must be set to the sensitivity difference between the High SPL channel and the Normal SPL channel. By default its value is set to 20 dB. Configuration registers: 0x52(5-0), 0x63(5-0), 0x64(5-0) 3.7 Thresholds Two thresholds can be configured to control/select the recombination engine behavior. In particular, they can be used to give more weight (in the final output) to the Normal Channel or to the High Channel which leads to choosing between having lower distortion (High Channel) or lower noise floor (Normal Channel). Configuration registers: 0x65(5-0), 0x66(5-0), 0x67(5-0), 0x68(5-0), 0x69(5-0), 0x6A(5-0) |
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