STA335BW13TR 데이터 시트보기 (PDF) - STMicroelectronics
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STA335BW13TR Datasheet PDF : 69 Pages
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Processing data paths
4
Processing data paths
STA335BW
Here are some diagrams that represent the data processing paths inside STA335BW. A
2-times oversampling FIR filter allows a 2x fs audio processing. Then a selectable high-pass
filter removes the DC level. Four biquad filters allow a full equalization system. A final
crossover filter is present. This filter can eventually be used as a fifth biquad stage, see the
I2C register settings for this specific usage. A prescaler and a final post scaler allow a full
control over the signal dynamic respectively before and after the filtering stages. A mixer
function is also available.
Figure 7. Processing data flow
Sampling
frequency=Fs
From
I2S input
interface
Sampling
frequency=2xFs
x2
FIR
over
sampling
PreScale
Hi-Pass
Filter
If HPB=0
If DEMP=0
Biquad
#1
Biquad
#2
Biquad
#3
Biquad
#4
De-
Emphasis
Bass
Treble
L
User-Defined Filters
If DSPB=0 and C1EQBP=0
If C1TCB=0
BTC: Bass Boost/Cut
TTC: Treble Boost/Cut
x2
FIR
over
sampling
PreScale
Hi-Pass
Filter
If HPB=0
If DEMP=0
Biquad
#1
Biquad
#2
Biquad
#3
Biquad
#4
De-
Emphasis
Bass
Treble
R
User-Defined Filters
If DSPB=0 and C2EQBP=0
If C2TCB=0
BTC: Bass Boost/Cut
TTC: Treble Boost/Cut
L
C1Mx1
Hi-Pass XO
Vol
+
Filter
And
Post scale
Limiter
R
C1Mx2
C2Mx1
+
C2Mx2
Hi-Pass XO
Filter
Vol
And
Limiter
Post scale
C3Mx1
+
C3Mx2
Lo-Pass XO
Filter
Vol
And
Limiter
Post scale
User-Defined Mix Coefficients
Crossover Frequency determined by XO Setting
User Defined If XO=0000
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