STA323W datasheet(41/71 Pages) STMICROELECTRONICS

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STA323W

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7.5

Configuration register D (address 0x03)

7.5.1

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.

7.5.2

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.

7.5.3

DSP bypass

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

7.5.4

Post-scale link

MME

ZDE

DRC

BQL

PSL

DSPB

DEMP

HPB

Table 29.

High-pass filter bypass

Bit

R/W

RST

Name

Description

0R/W

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

1R/W

DEMP

0: no de-emphasis

1: de-emphasis

Table 31.

DSP bypass

Bit

R/W

RST

Name

Description

R/W

DSPB

0: normal operation

1: bypass of EQ and mixing functionality

Table 32.

Post-scale link

Bit

R/W

RST

Name

Description

3R/W

PSL

0: each channel uses individual post-scale value

1: each channel uses channel 1 post-scale value

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