STA335BW datasheet(28/54 Pages) STMICROELECTRONICS

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STA335BW

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5.5.4

AM mode enable

STA335BW features a DDX processing mode that minimizes the amount of noise generated

in frequency range of AM radio. This mode is intended for use when DDX is operating in a

device with an AM tuner active. The SNR of the DDX processing is reduced to ~83 dB in this

mode, which is still greater than the SNR of AM radio.

5.5.5

PWM speed mode

5.5.6

Distortion compensation variable enable

5.5.7

Zero-crossing volume enable

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

zero-crossings no clicks are audible.

5.5.8

Soft volume update enable

Bit

R/W

RST

Name

Description

3R/W

AME

0 - Normal DDX operation.

1 - AM reduction mode DDX operation

Bit

R/W

RST

Name

Description

4R/W

PWMS

0 - Normal speed (384 kHz) all channels

1 - Odd speed (341.3 kHz) all channels

Bit

R/W

RST

Name

Description

5R/W

DCCV

0 - Uses preset DC coefficient

1 - Uses DCC coefficient

Bit

R/W

RST

Name

Description

6R/W

ZCE

1 - Volume adjustments only occur at digital

zero-crossings

0 - Volume adjustments occur immediately

Bit

R/W

RST

Name

Description

7R/W

SVE

1 – Volume adjustments ramp according to SVR settings

0 – Volume adjustments occur immediately

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