sta559bw STMicroelectronics, sta559bw Datasheet - Page 30

• Manufacturer Part Number: sta559bw
• Description: 5-volt, 2-amp, 2.1-channel High-efficiency Digital Audio System Sound Terminal
• Manufacturer: STMicroelectronics

Register description
30/67
Biquad coefficient link
Table 30.
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 31.
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
Table 32.
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.
Submix mode enable
Table 33.
4
5
6
7
Bit
Bit
Bit
Bit
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Biquad coefficient link
Dynamic range compression/anti-clipping bit
Zero-detect mute enable
Submix mode enable
0
0
0
1
RST
RST
RST
RST
SME
BQL
DRC
ZDE
Name
Name
Doc ID 18190 Rev 1
Name
Name
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode
0: submix into left/right disabled
1: submix into left/right enabled
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
0: automatic zero-detect mute disabled
1: automatic zero-detect mute enabled
Description
Description
Description
Description
STA559BW