sta335bw STMicroelectronics, sta335bw Datasheet - Page 26

• Manufacturer Part Number: sta335bw
• Description: 2.1 Channels High Efficiency Digital Audio System
• Manufacturer: STMicroelectronics

Register description
5.4.4
5.4.5
5.4.6
5.4.7
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Post-scale link
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
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
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.
Zero-detect mute enable
Setting the ZDE bit enables the zero-detect automatic mute. The zero-detect circuit looks at
the data for each processing channel at the output of the crossover (bass management)
filter. If any channel receives 2048 consecutive zero value samples (regardless of fs) then
that individual channel is muted if this function is enabled.
Bit
Bit
Bit
Bit
3
4
5
6
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RST
RST
RST
RST
0
0
0
1
Name
DRC
Name
Name
Name
PSL
BQL
ZDE
0 – Limiters act in anti-clipping mode
1 – Limiters act in dynamic range compression mode
0 – Each channel uses individual post-scale value
1 – Each channel uses channel 1 post-scale value
0 – Each channel uses coefficient values
1 – Each channel uses channel 1 coefficient values
Setting of 1 enables the automatic zero-detect mute
Description
Description
Description
Description
STA335BW