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STA309A データシートの表示(PDF) - STMicroelectronics
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STA309A
Multi-channel digital audio processor with DDX®
STMicroelectronics
STA309A Datasheet PDF : 67 Pages
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STA309A
1
Block diagram
Block diagram
Figure 1. Block diagram
LRCKI
BICKI
SDI12
SDI34
SDI56
SDI78
PLLB
SA
SCL SDA MVO
SERIAL
DATA
IN
I
2
C
SYSTEM
CONTROL
OVERSAMPLING
DDX
CHANNEL
MAPPING
VARIABLE
OVER-
SAMPLING
TREBLE,
BASS, EQ
(BIQUADS)
VOLUME
LIMITING
SYSTEM TIMING
PLL
POWER
DOWN
VARIABLE
DOWN-
SAMPLING
SERIAL
DATA
OUT
XTI
CKOUT
PWDN EAPD
OUT1A/B
OUT2A/B
OUT3A/B
OUT4A/B
OUT5A/B
OUT6A/B
OUT7A/B
OUT8A/B
LRCKO
BICKO
SDO12
SDO34
SDO56
SDO78
Figure 2. Channel signal flow
6 Inputs
From DSD
DSD
Conversion
Interp_Rate
8 Inputs
From I2S
1x,2x,4x
Mapping/
Interp
DSDE
Mix #1
Biquads
B/T
Mix #2
Volume
Limiter
2x
Interp
Distortion
Compensation
NS
C_Con
PWM
DDX
Output
From
Mix#1
Engine
Or
PreSc ale
Previous
Channel
Biquad#10
Output
(CxBLP)
Hard Set to
-18dB when
AutoMode EQ
(AMEQ)
High-Pass
Filter
User Progammable
Biquad #1 when
High-Pass Bypassed
(HPB)
Biquad
#2
Biquad
#3
Biquad
#4
Biquad
#5
Hard Set Coeffecients when AutoMode EQ
(AMEQ)
To
Mix#2
Biquad
#6
Biquad
#7
Biquad
#8
Bass
Treble
Engine
Hard Set
Hard Set
Coeffecients when Coeffecients when
AutoMode
DeEmphasis
Bass Management
Enabled
Crossover
(DEMP)
(AMBMXE)
User Programmable
Biquads #9 and #10
When Tone Bypassed
(CxTCB)
Doc ID 13855 Rev 4
9/67
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