[FAQ] TLV320AIC3104: How do you program the AIC3104 1st order HP filter?

There are 3 steps to load programmable coefficients for ADC First-Order HPF: ( need to be in order)

1. Load coefficients N0, N1, D1 to Page 1 / Register 65 - 70 and Page 1 / Register 71 - 76

2. Select the programmable coefficients (Go to Page 0 / Reg 107, and Set D7 = 1 and D6 = 1)

3. Enable ADC high-pass filter ( Go to Page 0 / Register 12, you can set D7-D6 to 01, or 10, or 11). Please ignore the -3dB frequency selection in this register, because in the programmable case, the real -3dB frequency is determined by the coefficients.