STV82X7 datasheet(118/156 Pages) STMICROELECTRONICS

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STV82x7

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EQ_BANDX_GAIN

Loudspeakers Equalizer Gain Register for BandX

Note:

With positive equalizer settings, internal clipping may occur even with an overall volume of less than

0 dB. This will lead to a clipped output signal. Therefore, it is not recommended to set equalizer

bands to a value that, in conjunction with volume, would result in an overall positive gain.

Bit Name

Reset

Function

Bits[7:2]

000000

Reserved.

LS_EQ_BT_SW

5-Band Equalizer or Bass-Treble selection

0: 5-Band Equalizer is selected for Loudspeakers.

1: Bass-Treble is selected for Loudspeakers.

LS_EQ_ON

5-Band Equalizer/Bass-Treble for loudspeakers Enable

0: 5-Band Equalizer/Bass-Teble is disabled

1: 5-Band Equalizer/Bass-Teble is enabled (Default)

Address: CAh to CEh

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

EQ_BANDX

Bit Name

Reset

Function

EQ_BANDX[7:0]

0000

BandX gain adjustment within a range from -12 dB to +12 dB in steps of 0.25 dB.

Band1: 100 Hz, Band2: 330 Hz, Band3: 1 kHz, Band4: 3.3 kHz, Band5: 10 kHz, see Table 31.

Table 31: Loudspeakers Equalizer/Bass-Treble Gain Values (and Headphone Bass-Treble Gain Values)

Value

Gain G (dB)

00110000

+12

00101111

+11.75

00101110

+11.50

................

.....

00000000 (Default)

................

.....

11010010

-11.50

11010001

-11.75

11010000

-12

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