STA323W datasheet(44/77 Pages) STMICROELECTRONICS

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STA323W

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7.4

Configuration register D (address 0x03)

7.4.1

High-pass filter bypass

The STA323W features an internal digital high-pass filter for DC blocking. The purpose of

this filter is to prevent DC signals from passing through a DDX® amplifier. DC signals can

cause speaker damage.

7.4.2

De-emphasis

By setting this bit to 1, de-emphasis is implemented on all channels. DSPB (DSP Bypass,

Bit D2, CFA) bit must be set to 0 for de-emphasis to function.

7.4.3

DSP bypass

Setting the DSPB bit bypasses all the EQ and mixing functions of the STA323W core.

MME

ZDE

DRC

BQL

PSL

DSPB

DEMP

HPB

01000000

Table 29.

High-pass filter bypass

Bit

R/W

RST

Name

Description

0RW

HPB

0: AC coupling high pass filter enabled

1: AC coupling high pass filter enabled

Table 30.

De-emphasis

Bit

R/W

RST

Name

Description

1RW

DEMP

0: no de-emphasis

1: de-emphasis

Table 31.

DSP bypass

Bit

R/W

RST

Name

Description

DSPB

0: normal operation

1: bypass of EQ and mixing functionality

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