STA559BW datasheet(29/67 Pages) STMICROELECTRONICS

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STA559BW

The STA559BW features an internal digital high-pass filter for the purpose of AC coupling.

The purpose of this filter is to prevent DC signals from passing through a FFX amplifier. DC

signals can cause speaker damage. When HPB = 0, this filter is enabled.

De-emphasis

DSP bypass

Setting the DSPB bit bypasses the EQ function of the STA559BW.

Postscale link

The postscale function can be used for power-supply error correction. For multi-channel

applications running off the same power-supply, the postscale values can be linked to the

value of channel 1 for ease of use and update the values faster.

Biquad coefficient link

For ease of use, all channels can use the biquad coefficients loaded into the Channel-1

coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to

be performed once.

Table 27. De-emphasis

Bit

R/W

RST

Name

Description

1R/W

DEMP

0: no de-emphasis

1: enable de-emphasis on all channels

Table 28. DSP bypass

Bit

R/W

RST

Name

Description

R/W

DSPB

0: normal operation

1: bypass of biquad and bass/treble functions

Table 29. Postscale link

Bit

R/W

RST

Name

Description

3R/W

PSL

0: each channel uses individual postscale value

1: each channel uses channel 1 postscale value

Table 30. Biquad coefficient link

Bit

R/W

RST

Name

Description

4R/W

BQL

0: each channel uses coefficient values

1: each channel uses channel 1 coefficient values

STA559BW Datasheet(PDF) 29 Page - STMicroelectronics

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