STA323W datasheet(49/71 Pages) STMICROELECTRONICS

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STA323W

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Setting AMEQ to any value, other than 00, enables automode EQ. When set, biquads 1-4

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

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

Table 52.

Automode volume

AMV (1,0)

Mode (MVOL)

MVOL 0.5dB 256 steps (standard)

MVOL auto curve 30 steps

MVOL auto curve 40 steps

MVOL auto curve 50 steps

Table 53.

Auto mode gain compression/limiters

AMGC (1...0)

Mode

User programmable GC

AC no clipping

AC limited clipping (10%)

DRC night time listening mode

Table 54.

AMPS – automode auto pre scale

Bit

R/W

RST

Name

Description

0R/W

AMPS

Auto Mode Pre-Scale

0 – -18 dB used for pre-scale when AMEQ /= 00

1 – User defined pre-scale when AMEQ /= 00

XO3

XO2

XO1

XO0

AMAM2

AMAM1

AMAM0

AMAME

000

Table 55.

Automode AM switching enable

Bit

R/W

RST

Name

Description

R/W

AMAME

0: switching frequency determined by PWMS setting

1: switching frequency determined by AMAM settings

3…1 R/W

000

AMAM (2…0)

Default: 000

Table 56.

Auto mode AM switching frequency selection

AMAM (2..0)

48 kHz/96 kHz input Fs

44.1 kHz/88.2 kHz input Fs

000

0.535 MHz – 0.720 MHz

0.535 MHz – 0.670 MHz

001

0.721 MHz – 0.900 MHz

0.671 MHz – 0.800 MHz

010

0.901 MHz – 1.100 MHz

0.801 MHz – 1.000 MHz

011

1.101 MHz – 1.300 MHz

1.001 MHz – 1.180 MHz

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