STA335BWSQS datasheet(33/70 Pages) STMICROELECTRONICS

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STA335BWSQS

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6.4.5

Biquad coefficient link

For ease of use, all channels can use the biquad coefficients loaded into the Channel 1

Coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to

be performed once.

6.4.6

Dynamic range compression/anti-clipping bit

Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.

When used in anti-clipping mode the limiter threshold values are constant and dependent on

the limiter settings. In dynamic range compression mode the limiter threshold values vary

with the volume settings allowing a night-time listening mode that provides a reduction in the

dynamic range regardless of the volume level.

6.4.7

Zero-detect mute enable

Setting the ZDE bit enables the zero-detect automatic mute. The zero-detect circuit looks at

the data for each processing channel at the output of the crossover (bass management)

filter. If any channel receives 2048 consecutive zero value samples (regardless of fs) then

that individual channel is muted if this function is enabled.

6.4.8

MiamiMode enable

Table 31.

BQL

Bit

RST

Name

Description

4RW

BQL

0: Each channel uses coefficient values

1: Each channel uses channel 1 coefficient values

Table 32.

DRC

Bit

RST

Name

Description

DRC

0: Limiters act in anti-clipping mode

1: Limiters act in dynamic range compression mode

Table 33.

ZDE

Bit

RST

Name

Description

ZDE

1: Enable the automatic zero-detect mute

Table 34.

MME

Bit

RST

Name

Description

7RW

MME

0: Sub mix into Left/Right disabled

1: Sub mix into Left/Right enabled

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