STA3398 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STA3398
STMicroelectronics
'STA3398' PDF : 78 Pages View PDF
Register description
STA339BW
7.4.3
DSP bypass
Bit R/W
2
R/W
Table 31. DSP bypass
RST
Name
Description
0
DSPB
0: Normal operation
1: Bypass of biquad and bass/treble functions
7.4.4
Setting the DSPB bit bypasses the EQ function of the STA339BW.
Post-scale link
Bit R/W
3
R/W
Table 32. Post-scale link
RST
Name
Description
0
PSL
0: Each channel uses individual post-scale value
1: Each channel uses channel 1 post-scale value
7.4.5
Post-scale functionality can be used for power-supply error correction. For multi-channel
applications running off the same power-supply, the post-scale values can be linked to the
value of channel 1 for ease of use and update the values faster.
Biquad coefficient link
Bit R/W
4
R/W
Table 33. Biquad coefficient link
RST
Name
Description
0
BQL
0: Each channel uses coefficient values
1: Each channel uses channel 1 coefficient values
7.4.6
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.
Dynamic range compression/anti-clipping bit
Table 34. Dynamic range compression/anti-clipping bit
Bit R/W RST
Name
Description
5
R/W
0
DRC
0: Limiters act in anti-clipping mode
1: Limiters act in dynamic range compression mode
Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.
When used in anti-clipping mode the limiter threshold values are constant and dependent
on the limiter settings. In dynamic range compression mode the limiter threshold values vary
with the volume settings allowing a nighttime listening mode that provides a reduction in the
dynamic range regardless of the volume level.
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