Datasheet

STA559BW Register description
Doc ID 18190 Rev 1 29/67
6.1.4 Configuration register D (addr 0x03)
High-pass filter bypass
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.
D7 D6 D5 D4 D3 D2 D1 D0
SME ZDE DRC BQL PSL DSPB DEMP HPB
01000000
Table 26. High-pass filter bypass
Bit R/W RST Name Description
0 R/W 0 HPB 1: bypass internal AC coupling digital high-pass filter
Table 27. De-emphasis
Bit R/W RST Name Description
1R/W0 DEMP
0: no de-emphasis
1: enable de-emphasis on all channels
Table 28. DSP bypass
Bit R/W RST Name Description
2 R/W 0 DSPB
0: normal operation
1: bypass of biquad and bass/treble functions
Table 29. Postscale link
Bit R/W RST Name Description
3R/W0 PSL
0: each channel uses individual postscale value
1: each channel uses channel 1 postscale value