STA309A datasheet(9/67 Pages) STMICROELECTRONICS

9 / 67 page

STA309A

Block diagram

9/67

Block diagram

Figure 1.

Block diagram

Figure 2.

Channel signal flow

OUT1A/B

OUT2A/B

OUT3A/B

OUT4A/B

OUT5A/B

OUT6A/B

OUT7A/B

OUT8A/B

LRCKI

BICKI

SDI12

SDI34

SDI56

SDI78

SERIAL

DATA

I2C

CHANNEL

MAPPING

VARIABLE

OVER-

SAMPLING

TREBLE,

BASS, EQ

(BIQUADS)

VOLUME

LIMITING

SDO78

SDO12

SDO34

SDO56

OVERSAMPLING

VARIABLE

DOWN-

SAMPLING

POWER

DOWN

PWDN

EAPD

PLL

PLLB

XTI

CKOUT

SCL SDA

LRCKO

BICKO

MVO

SERIAL

DATA

OUT

SYSTEM

CONTROL

SYSTEM TIMING

DDX

1x,2x,4x

Interp

Biquads

B/T

Volume

Limiter

Interp

Distortion

Compensation

C_Con

PWM

DDX

Output

Interp_Rate

8 Inputs

From I2S

DSD

Conversion

6 Inputs

From DSD

Mapping/

Mix #1

DSDE

Mix #2

PreScale

High-Pass

Filter

Biquad

Bass

Hard Set to

-18dB when

AutoMode EQ

(AMEQ)

Hard Set Coeffecients when AutoMode EQ

(AMEQ)

Hard Set

Coeffecients when

AutoMode

Bass Management

Crossover

(AMBMXE)

Hard Set

Coeffecients when

DeEmphasis

Enabled

(DEMP)

From

Mix#1

Engine

Channel

Biquad#10

Output

(CxBLP)

Mix#2

Engine

Treble

User Progammable

Biquad #1 when

High-Pass Bypassed

(HPB)

User Programmable

Biquads #9 and #10

When Tone Bypassed

(CxTCB)

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