sta381bw STMicroelectronics, sta381bw Datasheet - Page 35

• Manufacturer Part Number: sta381bw
• Description: Sound Terminal 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA381BW
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 018835 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
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