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廬

TDA7550/R TDA7551

TDA7552 TDA7553

DIGITAL SIGNAL PROCESSING IC FOR SPEECH AND

AUDIO APPLICATIONS

PRODUCT PREVIEW

24-BIT, FIXED POINT, 50 MIPS DSP CORE

LARGE ON-BOARD PROGRAM ROM AND

DATA RAM (UP TO 16Kw ROM/RAM AND

16Kw RAM)

INTEGRATED STEREO A/D AND D/A, 16-BIT

SIGMA-DELTA

PROGRAMMABLE CODEC SAMPLE RATE

FROM 4 TO 48 kHz

ON-BOARD PLL FOR CORE CLOCK AND

CONVERTERS

MANAGEMENT

OF

EXTERNAL

FLASH/SRAM/DRAM MEMORY BANK

I

2

C OR SPI SERIAL INTERFACE FOR EX-

TERNAL CONTROL

80-PIN TQFP, 0.65 mm PITCH

AUTOMOTIVE GRADE (FROM -40擄 C to

+85擄C)

DESCRIPTION

The TDA755X family is a high performances, fully

programmable 24-bit, 50 MIPS Digital Signal

BLOCK DIAGRAM

MULTIPLEXED BUS

TQFP80

Processor (DSP), designed to support several

speech and audio applications, as Automatic

Speech Recognition, Speech Synthesis, Speaker

Verification, Echo and Noise Cancellation. Soft-

ware for these applications is licenced by Lernout

& Hauspie and NCTI.

It offers an effective solution for this kind of appli-

cations because of the A/D and D/A converters

and the big amount of memory integrated on chip.

I

2

C/SPI

PORT

FLASH

INTERFACE

SAI

ROM/RAM

RAM

8

FLAGS

DSP

CORE

DAC

L

ANALOG OUT

R

L

ANALOG IN

R

ADC

PLL

D99AU1020A

September 1999

This is preliminary information on a new product now in development. Details are subject to change without notice.

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