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STA381BW датащи(PDF) 35 Page - STMicroelectronics

номер детали STA381BW
подробное описание детали  Sound Terminal® 2.1-channel high-efficiency digital audio system
PDF  171 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA381BW датащи(HTML) 35 Page - STMicroelectronics

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STA381BW
Device overview
Doc ID 018835 Rev 7
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Figure 13.
Stereo link block diagram
4.3.9
Programming of coefficients
The coefficients are expressed in different value ranges and in decimal notation (refer to the
previous paragraphs). In order to be programmed they must be converted into a
[-1, +1) range and in hexadecimal notation (Table 11). This can be achieved with the
following procedure:
if CoeffDecValue>0
if CoeffDecValue<0
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.
+
Output
Ch 0
Attenuator
From mapper
Ch 0 – Band 0
Attenuator
From mapper
Ch 0 – Band 1
Attenuator
Attenuator
X
X
Ch 0 – Band 1
Ch 0 – Band 0
+
Output
Ch 1
Attenuator
From mapper
Ch 1 – Band 0
Attenuator
From mapper
Ch 1 – Band 1
Attenuator
Attenuator
X
X
Ch 1 – Band 1
Ch 1 – Band 0
Max
Attenuation
Band 0
Max
Attenuation
Band 1
CoeffI2CValue
rnd CoeffDecValue 2
6
() 2
23
×
()
=
CoeffI2CValue
2
24
rnd CoeffDecValue 2
6
() 2
23
×
()
=



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