STA326 datasheet(38/64 Pages) STMICROELECTRONICS

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STA326

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DocID11531 Rev 9

7.8

Automode registers

7.8.1

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 prescale value for channels 1-2 becomes hard-set to -18 dB.

AMPS

Reserved

AMGC1

AMGC0

AMV1

AMV0

AMEQ1

AMEQ0

Table 48. Automode EQ

AMEQ[1,0]

Mode (biquad 1-4)

User programmable

Preset EQ - PEQ bits

Auto volume controlled loudness curve

Not used

Table 49. 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 50. Automode gain compression/limiters

AMGC[1:0]

Mode

User programmable GC

AC no clipping

AC limited clipping (10%)

DRC nighttime listening mode

Table 51. AMPS - Automode auto prescale

Bit

R/W

RST

Name

Description

AMPS

Automode prescale

0: -18 dB used for prescale when AMEQ neq 00

1: user-defined prescale when AMEQ neq 00

Obsolete

Product(s)

- Obsolete

Product(s)

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