STA320 datasheet(18/37 Pages) STMICROELECTRONICS

Part #	STA320

Description	2.1 MULTICHANNELS DIGITAL AUDIO PROCESSOR WITH DDTM

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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STA320

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Table 17. Channel Volume as a function of CxV(7..0)

5.8 Auto Mode Registers

5.8.1 AutoMode Register 1(Address 0x0B)

Table 18. AutoMode EQ Settings

By setting AMEQ to any setting other than 00 enables AutoMode EQ. When set, biquads 1-4 are not user

programmable. Any coefficient settings for these biquads will be ignored. Also when AutoMode EQ is used

the pre-scale value for channels 1-6 becomes hard-set to -18dB, dependent upon the value of AMPS

Table 19. AutoMode Volume Settings

CxV(7..0)

Volume

00000000(00h)

+48dB

00000001(01h)

+47.5dB

00000010(02h)

+47dB

……

01100001(5Fh)

+0.5dB

01100000(60h)

0dB

01011111(61h)

-0.5dB

……

11010111(D7h)

+59.5dB

11011000(D8h)

-60dB

11011001(D9h)

-61dB

11011010(DAh)

-62dB

……

11101100(ECh)

-80 dB

11101101(EDh)

Hard Channel Mute

……

11111111(FFh)

Hard Channel Mute

D7

D6

D5

D4

D3

D2

D1

D0

AMPS

AMGC1

AMGC2

AMV2

AMV1

AMEQ1

AMEQ0

1

0000

00

AMEQ(1,0)

Mode(Biquad 2-6)

00

User Programmable

01

Preset EQ – PEQ bits

10

Auto Volume Controlled Loudness Curve

11

NA

AMV(1,0)

Mode(MVOL)

00

MVOL 0.5dB 256 Steps (Standard)

01

MVOL Auto Curve 30 Steps

10

MVOL Auto Curve 40 Steps

11

MVOL Auto Curve 50 Steps

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