sta381bws STMicroelectronics, sta381bws Datasheet - Page 35
sta381bws
Manufacturer Part Number
sta381bws
Description
Sound Terminal 2.1-channel High-efficiency Digital Audio System Sound Terminal 2.1-channel High-efficiency Digital Audio System
Manufacturer
STMicroelectronics
Datasheet
1.STA381BWS.pdf
(168 pages)
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Part Number:
STA381BWS
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STA381BWS
4.3.9
Figure 13. Stereo link block diagram
Programming of coefficients
The coefficients are expressed in different value ranges and in decimal notation (see the
above paragraphs). In order to be programmed they must be converted into a
[-1, +1) range and in hexadecimal notation
following procedure:
●
●
where CoeffI2CValue is the final decimal value to be converted into hexadecimal notation
while CoeffDecValue is the coefficient value (in decimal notation) to start from.
if CoeffDecValue>0
if CoeffDecValue<0
Ch 0 – Band 0
Ch 0 – Band 0
Ch 0 – Band 1
Ch 0 – Band 1
Ch 1 – Band 0
Ch 1 – Band 0
Ch 1 – Band 1
Ch 1 – Band 1
From mapper
From mapper
From mapper
From mapper
CoeffI2CValue
CoeffI2CValue
Attenuator
Attenuator
Attenuator
Attenuator
Doc ID 018937 Rev 2
=
2
=
24
rnd CoeffDecValue 2
–
rnd CoeffDecValue 2
(
(
Attenuation
Attenuation
(
Attenuator
Attenuator
Attenuator
Attenuator
(
Band 0
Band 1
(Table
Max
Max
11). This can be achieved with the
⁄
6
⁄
) 2
×
6
X
X
X
X
) 2
×
23
)
23
)
+
+
Device overview
Output
Output
Ch 0
Ch 1
35/168
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