STA328 datasheet(35/57 Pages) STMICROELECTRONICS

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STA328

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6.8

AutoMode registers

6.8.1

AutoModes EQ, volume, GC (addr 0x0B)

By setting AMEQ to any setting other than 00 enables AutoMode EQ where biquads 1-4 are

not user programmable. Any coefficient settings for these biquads are ignored. Also when

AutoMode EQ is used the pre-scale value for channels 1-2 becomes hard-set to -18 dB.

AMPS

Reserved

AMGC1

AMGC0

AMV1

AMV0

AMEQ1

AMEQ0

000

Table 49.

AutoMode EQ

AMEQ[1,0]

Mode (biquad 1-4)

User programmable

Preset EQ - PEQ bits

Auto volume controlled loudness curve

Not used

Table 50.

AutoMode volume

AMV[1,0]

Mode (MVOL)

MVOL 0.5 dB 256 steps (standard)

MVOL auto curve 30 steps

MVOL auto curve 40 steps

MVOL auto curve 50 steps

Table 51.

AutoMode gain compression/limiters

AMGC[1:0]

Mode

User programmable GC

AC no clipping

AC limited clipping (10%)

DRC nighttime listening mode

Table 52.

AMPS - AutoMode auto prescale

Bit

R/W

RST

Name

Description

AMPS

AutoMode pre-scale

0: -18 dB used for pre-scale when AMEQ neq 00

1: user defined pre-scale when AMEQ neq 00

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