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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AD1985JST Fiches technique(PDF) 33 Page - Analog Devices |
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AD1985JST Fiches technique(HTML) 33 Page - Analog Devices |
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33 / 48 page  AD1985 Rev. A | Page 33 of 48 EQ Control Register (Index 0x60) Reg.Num. Name D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default 0x60 EQ Control EQM X X X X X X X SYM CHS BCA5 BCA4 BCA3 BCA2 BCA1 BCA0 0x8080 Register 0x60 is a read/write register that controls equalizer function and data setup. The register also contains the biquad and coefficient address pointer, which is used in conjunction with the EQ data register (0x78) to set up the equalizer coefficients. The reset default disables the equalizer function until the coefficients can be properly set up by the software and sets the symmetry bit to allow equal coefficients for left and right channels. BCA[5:0] Biquad and Coefficient Address Pointer: biquad 0 coef a0 BCA[5:0] = 011011 biquad 0 coef a1 BCA[5:0] = 011010 biquad 0 coef a2 BCA[5:0] = 011001 biquad 0 coef b1 BCA[5:0] = 011101 biquad 0 coef b2 BCA[5:0] = 011100 biquad 1 coef a0 BCA[5:0] = 100000 biquad 1 coef a1 BCA[5:0] = 011111 biquad 1 coef a2 BCA[5:0] = 011110 biquad 1 coef b1 BCA[5:0] = 100010 biquad 1 coef b2 BCA[5:0] = 100001 biquad 2 coef a0 BCA[5:0] = 100101 biquad 2 coef a1 BCA[5:0] = 100100 biquad 2 coef a2 BCA[5:0] = 100011 biquad 2 coef b1 BCA[5:0] = 100111 biquad 2 coef b2 BCA[5:0] = 100110 biquad 3 coef a0 BCA[5:0] = 101010 biquad 3 coef a1 BCA[5:0] = 101001 biquad 3 coef a2 BCA[5:0] = 101000 biquad 3 coef b1 BCA[5:0] = 101100 biquad 3 coef b2 BCA[5:0] = 101011 biquad 4 coef a0 BCA[5:0] = 101111 biquad 4 coef a1 BCA[5:0] = 101110 biquad 4 coef a2 BCA[5:0] = 101101 biquad 4 coef b1 BCA[5:0] = 110001 biquad 4 coef b2 BCA[5:0] = 110000 biquad 5 coef a0 BCA[5:0] = 110100 biquad 5 coef a1 BCA[5:0] = 110011 biquad 5 coef a2 BCA[5:0] = 110010 biquad 5 coef b1 BCA[5:0] = 110110 biquad 5 coef b2 BCA[5:0] = 110101 biquad 6 coef a0 BCA[5:0] = 111001 biquad 6 coef a1 BCA[5:0] = 111000 biquad 6 coef a2 BCA[5:0] = 110111 biquad 6 coef b1 BCA[5:0] = 111011 biquad 6 coef b2 BCA[5:0] = 111010 CHS Channel Select. CHS = 0: Selects left channel coefficients data block. CHS = 1: Selects right channel coefficients data block. SYM Symmetry. When set to 1 this bit indicates that the left and right channel coefficients are equal. This shortens the coefficient setup sequence since only the left channel coefficients need to be addressed and set up. (The right channel coefficients are simultaneously copied into memory.) EQM Equalizer Mute. When set to 1, this bit disables the equalizer function (allows all data to pass through). The reset default sets this bit to 1, disabling the equalizer function until the biquad coefficients can be properly set. |
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