13/37

STA320

5.4.5 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.

5.4.6 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.

5.4.7 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 func-

tion is enabled

5.5 Configuration Register E(Address 04h)

5.5.1 Max Power Correction Variable

5.5.2 Max Power Correction

BIT

R/W

RST

NAME

DESCRIPTION

4

R/W

0

BQL

Biquad Link:

0 - Each Channel uses coefficient values

1 - Each Channel uses Channel 1 coefficient values

BIT

R/W

RST

NAME

DESCRIPTION

5

R/W

0

DRC

Dynamic Range Compression/Anti-Clipping

0 – Limiters act in Anti-Clipping Mode

1 – Limiters act in Dynamic Range Compression Mode

BIT

R/W

RST

NAME

DESCRIPTION

6

R/W

1

ZDE

Zero-Detect Mute Enable: Setting of 1 enables the automatic

zero-detect mute

BIT

R/W

RST

NAME

DESCRIPTION

7

R/W

0

MME

Miami-Mode Enable:

0 - Sub Mix into Left/Right Disabled

1 - Sub Mix into Left/Right Enabled

D7

D6

D5

D4

D3

D2

D1

D0

SVE

ZCE

DCCV

PWMS

AME

NSBW

MPC

MPCV

110000

10

BIT

R/W

RST

NAME

DESCRIPTION

0

R/W

0

MPCV

Max Power Correction Variable:

0 - Use Standard MPC Coefficient

1 - Use MPCC bits for MPC Coefficient

BIT

R/W

RST

NAME

DESCRIPTION

1

R/W

1

MPC

Max Power Correction: Setting of 1 enables

STA50x/STA51x correction for THD reduction near maximum

power output