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STA381BWS 数据表(PDF) 35 Page - STMicroelectronics |
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STA381BWS 数据表(HTML) 35 Page - STMicroelectronics |
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35 / 171 page  STA381BWS Device overview Doc ID 018937 Rev 6 35/171 Figure 13. Stereo link block diagram 4.3.9 Programming of coefficients The coefficients are expressed in different value ranges and in decimal notation (refer to the previous paragraphs). In order to be programmed they must be converted into a [-1, +1) range and in hexadecimal notation (Table 11). This can be achieved with the following procedure: ● if CoeffDecValue>0 ● if CoeffDecValue<0 where CoeffI2CValue is the final decimal value to be converted into hexadecimal notation while CoeffDecValue is the coefficient value (in decimal notation) to start from. + Output Ch 0 Attenuator From mapper Ch 0 – Band 0 Attenuator From mapper Ch 0 – Band 1 Attenuator Attenuator X X Ch 0 – Band 1 Ch 0 – Band 0 + Output Ch 1 Attenuator From mapper Ch 1 – Band 0 Attenuator From mapper Ch 1 – Band 1 Attenuator Attenuator X X Ch 1 – Band 1 Ch 1 – Band 0 Max Attenuation Band 0 Max Attenuation Band 1 CoeffI2CValue rnd CoeffDecValue 2 6 ⁄ () 2 23 × () = CoeffI2CValue 2 24 rnd CoeffDecValue 2 6 ⁄ () 2 23 × () – = |
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