STA339BWS13TR STMicroelectronics, STA339BWS13TR Datasheet - Page 17

• Manufacturer Part Number: STA339BWS13TR
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA339BWS13TR

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +70°C
• Supply Voltage Max: 21.5V
• Supply Voltage Min: 4.5V
• Termination: RoHS Compliant
• Package / Case: PowerSSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

STA339BWS
4
Processing data paths
Figure 6
whole processing chain is composed of two consecutive sections. In the first one,
dual-channel processing is implemented and in the second section each channel is fed into
the post-mixing block either to generate a third channel (typically used in 2.1 output
configuration and with crossover filters enabled) or to have the channels processed by the
dual-band DRC block (2.0 output configuration with crossover filters used to define the
cut-off frequency of the two bands).
The first section,
processing. Then a selectable high-pass filter removes the DC level (enabled if HPB = 0).
The left and right channel processing paths can include up to 8 filters, depending on the
selected configuration (bits BQL, BQ5, BQ6, BQ7 and XO[3:0]). By default, four user
programmable, independent filters per channel are enabled, plus the preconfigured
de-emphasis, bass and treble controls (BQL = 0, BQ5 = 0, BQ6 = 0, BQ7 = 0).
If the coefficient sets for the two channels are linked (BQL = 1) it is possible to use the
de-emphasis, bass and treble filters in a user defined configuration (provided the relevant
BQx bits are set). In this case both channels use the same processing coefficients and can
have up to seven filters each. If BQL = 0 the BQx bits are ignored and the fifth, sixth and
seventh filters are configured as de-emphasis, bass and treble controls, respectively.
Figure 6.
Moreover, the common 8th filter can be available on both channels provided the predefined
crossover frequencies are not used, XO[3:0] = 0, and the dual-band DRC is not used.
In the second section,
enabled they are fully user-programmable and allow the generation of a third channel
(2.1 outputs). Alternatively, in mode B
define the cut-off frequencies of the two bands. A prescaler and a final postscaler allow full
control over the signal dynamics before and after the filtering stages. A mixer function is also
available.
Sampling
Sampling
Sampling
Sampling
frequency=Fs
frequency=Fs
frequency=Fs
frequency=Fs
From
From
From
From
I2S input
I2S input
I2S input
I2S input
interface
interface
interface
interface
and
sampling
sampling
sampling
sampling
Left and right processing, section 1
Figure 7
over
over
over
over
over
over
over
over
FIR
FIR
FIR
FIR
FIR
FIR
FIR
FIR
x2
x2
x2
x2
x2
x2
x2
x2
Figure
Sampling
Sampling
Sampling
Sampling
frequency=2xFs
frequency=2xFs
frequency=2xFs
frequency=2xFs
PreScale
PreScale
PreScale
PreScale
PreScale
PreScale
PreScale
PreScale
below show the data processing paths inside STA339BWS. The
Figure
6, begins with a 2x oversampling FIR filter providing 2 * f
If HPB=0
If HPB=0
If HPB=0
If HPB=0
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Hi-Pass
Filter
Filter
Filter
Filter
Filter
Filter
Filter
Filter
Filter
Filter
7, mixing and crossover filters are available. If B
Doc ID 15276 Rev 3
Biquad
Biquad
Biquad
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#1
#1
#1
#1
#1
#1
#1
#1
DRC, these blocks are used to split the sub-band and
If DSPB=0 and C1EQBP=0
If DSPB=0 and C1EQBP=0
If DSPB=0 and C2EQBP=0
If DSPB=0 and C2EQBP=0
Biquad
Biquad
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Biquad
#2
#2
#2
#2
#2
#2
#2
#2
User Defined Filters
User Defined Filters
User Defined Filters
User Defined Filters
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#3
#3
#3
#3
#3
#3
#3
#3
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#4
#4
#4
#4
#4
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and BQL=1
and BQL=1
and BQL=1
and BQL=1
If DEMP=0
If DEMP=0
If DEMP=0
If DEMP=0
If BQ5=1
If BQ5=1
If BQ5=1
If BQ5=1
De-Emph.
De-Emph.
De-Emph.
De-Emph.
Biquad
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#5
#5
#5
#5
Processing data paths
and BQL=1
and BQL=1
and BQL=1
and BQL=1
If C1TCB=0
If C1TCB=0
BTC: Bass Boost/Cut
BTC: Bass Boost/Cut
TTC: Treble Boost/Cut
TTC: Treble Boost/Cut
If C2TCB=0
If C2TCB=0
BTC: Bass Boost/Cut
BTC: Bass Boost/Cut
TTC: Treble Boost/Cut
TTC: Treble Boost/Cut
If BQ6=1
If BQ6=1
If BQ6=1
If BQ6=1
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Bass
Bass
Bass
Bass
#6
#6
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#6
and BQL=1
and BQL=1
and BQL=1
and BQL=1
IF BQ7=1
IF BQ7=1
IF BQ7=1
IF BQ7=1
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Treble
Treble
Treble
Treble
2
#7
#7
#7
#7
DRC is not
S
audio
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