STA381BWSTR STMicroelectronics, STA381BWSTR Datasheet - Page 142

• Manufacturer Part Number: STA381BWSTR
• Description: Audio DSPs Sound Terminal 2.1 High EFF Dig Audio
• Manufacturer: STMicroelectronics

Specifications of STA381BWSTR

• Product Category: Audio DSPs
• Rohs: yes
• Operating Supply Voltage: 4.5 V to 25.5 V
• Operating Temperature Range: 0 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: VQFN-48
• Snr: 100 dB

Register description: Sound Terminal compatibility
7.16
7.16.1
142/171
Extended configuration register (addr 0x36)
The extended configuration register provides access to B
Dual-band DRC
The STA381BWS device provides a dual-band DRC (B
data path, as depicted in
Figure 40. B
The low-frequency information (LFE) is extracted from the left and right channels, removing
the high frequencies using a programmable biquad filter, and then computing the difference
with the original signal. Limiter 1 (DRC1) is then used to control the amplitude of the
left/right high-frequency components, while limiter 2 (DRC2) is used to control the low-
frequency components (see
The cutoff frequency of the high-pass filters can be user-defined, XO[3:0] = 0, or selected
from the pre-defined values.
DRC1 and DRC2 are then used to independently limit L/R high frequencies and LFE
channel amplitude (see
this configuration, the dedicated channel 3 volume control can actually act as a bass-boost
enhancer as well (0.5 dB/step resolution).
The processed LFE channel is then recombined with the L and R channels in order to
reconstruct the 2.0 output signal.
MDRCE
D7
0
R
L
Reserved
2
DRC scheme
D6
0
Chapter
Figure
PS48DB
Hi-pass XO
Hi-pass XO
D5
0
B
B
Chapter
2
filter
2
filter
DRC
DRC
Doc ID 018937 Rev 6
40. The dual-band DRC is activated by setting MDRCE = 1.
7.11) as well as their volume control. To be noted that, in
7.11).
-
- +
XAR1
D4
0
+
Channel 3
Channel 2
Channel 1
Channel 3
Volume
Volume
Volume
Volume
XAR2
D3
0
2
DRC) on the left and right channel
2
DRC and biquad 5, 6 and 7.
BQ5
DRC 2
DRC 1
D2
DRC 1
DRC 2
0
+
+
BQ6
D1
0
STA381BWS
BQ7
D0
0