STA308A View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA308A

Multi-channel digital audio processor with DDX™

STMicroelectronics 

Block diagram

1

Block diagram

STA308A

Figure 1. Block diagram

LRCKI

BICKI

SDI12

SDI34

SDI56

SDI78

PLLB

SA

SCL SDA MVO

SERIAL

DATA

IN

I2C

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)

8/63

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