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3.1.3 Serial Audio Input Interface First Bit

3.1.4 Zero-Crossing Volume Enable

The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital zero-crossings,

"zipper noise" is eliminated

3.1.5 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 gain/attenuation settings applied

to the input signal. In dynamic range compression mode the limiter threshold values vary with the volume set-

tings allowing for limiting to occur independently of the gain/attenuation but dependent on the input signal

3.2 Configuration Register C (address 02h)

3.2.1 DDX Power Output Mode

The DDX Power Output Mode selects how the DDX output timing is configured. Different power devices use

different output modes. The DDX recommended use is OM = 00. The variable mode uses the OMVx bits for

adjustment

BIT

R/W

RST

NAME

DESCRIPTION

5

R/W

0

SAIFB

Determines MSB or LSB first for all SAI formats

0 – MSB First, 1 – LSB First

BIT

R/W

RST

NAME

DESCRIPTION

6

R/W

1

ZCE

Zero-Crossing Volume Enable :

1 – Volume adjustments will only occur at digital zero-crossings

0 – Volume adjustments will occur immediately

BIT

R/W

RST

NAME

DESCRIPTION

7

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

D7

D6

D5

D4

D3

D2

D1

D0

NAME

HPB

RES

RES

RES

RES

RES

OM1

OM0

RST

0

1

1

111

0

0

BIT

R/W

RST

NAME

DESCRIPTION

0

R/W

0

OM0

DDX Power Output Mode : Selects configuration of DDX output.

1

R/W

0

OM1

OM(1,0)

Output Stage - Mode

00

Fixed Compensation

01

RESERVED

10

Full Power Mode recommended for STA500 and STA505

11

RESERVED