STA014B datasheet(28/45 Pages) STMICROELECTRONICS

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BASS_FREQUENCY_LOW

Address: 0x79 (121)

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

BF7

BF6

BF5

BF4

BF3

BF2

BF1

BF0

BASS_FREQUENCY_HIGH

Address: 0x7A (122)

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

BF15 BF14 BF13 BF12 BF11 BF10

BF9

BF8

The registers BASS_FREQUENCY_HIGH and

BASS_FREQUENCY_LOW,

logically

concate-

nated as a 16 bit wide register, are used to select

the frequency, in Hz, where the selected fre-

quency is -12dB respect to the pass-band. By

setting the BASS_FREQUENCY registers, the

following rules must be kept:

Bass_Freq <= Treble_Freq

Bass_Freq > 0

(suggested range: 20 Hz < Bass_Freq < 750 Hz)

Example:

Bass = 200Hz

Treble = 3kHz

TFS

15 14 13 12 11 10

9876543210

0000101110111000

BFS

15 14 13 12 11 10

9876543210

0000000011001000

TREBLE_ENHANCE

Address: 0x7B (123)

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

TE7

TE6

TE5

TE4

TE3

TE2

TE1

TE0

Signed number (2 complement)

This register is used to select the enhancement

or attenuation STA014 has to perform on Treble

Frequency range at the digital signal.

A decrement (increment) of a decimal unit corre-

sponds to a step of attenuation (enhancement) of

1.5dB.

The allowed Attenuation/Enhancement range is

[-18dB, +18dB].

MSB

LSB

ENHANCE/ATTENUATION

1.5dB step

000

+18

+16.5

000

+15

+13.5

00000001

00000000

11111111

-1

11110111

-13.5

11110110

-15

11110100

-16.5

11110100

-18

STA014-STA014B-STA014T

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