MSM7617 查看數據表（PDF） - Oki Electric Industry

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MSM7617

2-Channel Echo Canceler

Oki Electric Industry 

¡ Semiconductor

BLOCK DIAGRAM

MSM7617

RIN1

S/P

Non-linear/

Linear

–6LR ATT GC

+6LR

Linear/

Non-linear

P/S

Howling

Detector

Double Talk

Detector

Power

Calculator

Adaptive

FIR Filter

(AFF)

2100 Hz Tone,

Phase Reverse CH1

Detector

–

SOUT1

P/S

Linear/

Non-linear

SG

Center

Clip

+6LR

ATT

+ –6LR SA

+

Non-linear/

Linear

S/P

ROUT1

DF1

WDT1

SIN1

RIN2

S/P

Non-linear/

Linear

–6LR ATT GC

+6LR

Linear/

Non-linear

P/S

Howling

Detector

Double Talk

Detector

Power

Calculator

Adaptive

FIR Filter

(AFF)

2100 Hz Tone,

Phase Reverse CH2

Detector

SOUT2

SYNCO

SCKO

VDD (PLL)

VSS (PLL)

–

P/S

Linear/

Non-linear

SG

Center

Clip

+6LR

ATT

+ –6LR SA

+

Clock Generator

EC-A Controller

PLL

EC-B Controller

Non-linear/

Linear

S/P

I/O Controller

ROUT2

DF2

WDT2

SIN2

VDD

VSS

The above diagram shows internal connections for 2-channel parallel mode. The internal

connections for 2-channel serial I/O mode and 1-channel cross-connected mode are shown

below.

2-channel parallel I/O mode

2-channel serial I/O mode

1-channel cross-connected mode

CH1

RIN1

RIN

ROUT

ROUT1 RIN1

CH1

RIN

ROUT

ROUT1

CH1

RIN

ROUT

ROUT1

AFF

AFF

SOUT

SIN

SOUT

SIN

SOUT1

+

SIN1 SOUT1

+

SIN1

AFF

SOUT

SIN

+

SIN1

CH2

RIN2

RIN

ROUT

ROUT2

CH2

RIN

ROUT

CH2

RIN

ROUT

ROUT2

AFF

SOUT

SIN

SOUT2

+

SIN2

AFF

SOUT

SIN

+

AFF

SOUT

SIN

+

SIN2

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