REV. 0

AD1981A

–17–

EQ Control Register (Index 60h)

Reg. Num. Name

D15

D14

D13 D12 D11 D10 D9 D8

D7

D6

D5

D4

D3

D2

D1

D0

Default

60h

EQCTRL EQM MAD LBEN

XXXX

X

X SYM CHS BCA5 BCA4 BCA3 BCA2 BCA1 BCA0 8080h

*Register 60h is a read/write register that controls the equalizer functionality and data setup. The register also contains the biquad and coefficient address pointer,

which is used in conjunction with the EQ data register (78h) 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