STA382BW datasheet(65/172 Pages) STMICROELECTRONICS

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STA382BW

Doc ID 022783 Rev 1

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6.16.4

Zero-detect mute enable

Refer to 6.32: Enhanced zero-detect mute and input level measurement (address 0x61-

0x65, 0x3F, 0x40, 0x6F).

6.16.5

Submix mode enable

6.17

Configuration register E (addr 0x15)

6.17.1

Noise-shaper bandwidth selection

6.17.2

AM mode enable

The STA382BW features an FFX processing mode that minimizes the amount of noise

generated in the frequency range of AM radio. This mode is intended for use when FFX is

operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to

approximately 83 dB in this mode, which is still greater than the SNR of AM radio.

Table 42.

Zero-detect mute enable

Bit

R/W

RST

Name

Description

6R/W

ZDE

Setting of 1 enables the automatic zero-detect mute

Setting of 0 disables the automatic zero-detect mute

Table 43.

Submix mode enable

Bit

R/W

RST

Name

Description

7R/W

SME

0: Submix into left/right disabled

1: Submix into left/right enabled

Reserved

ZCE

Reserved

PWMS

AME

NSBW

Reserved

Table 44.

Noise-shaper bandwidth selection

Bit

R/W

RST

Name

Description

R/W

NSBW

1: Third order NS

0: Fourth order NS

Table 45.

AM mode enable

Bit

R/W

RST

Name

Description

3R/W

AME

0: Normal FFX operation

1: AM reduction mode FFX operation

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