STA333BW datasheet(32/64 Pages) STMICROELECTRONICS

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STA333BW

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6.5.4

AM mode enable

STA333BW 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.

6.5.5

PWM speed mode

6.5.6

Distortion compensation variable enable

6.5.7

Zero-crossing volume enable

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

zero-crossings no clicks are audible.

6.5.8

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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