TDA7550 Datasheet, PDF (1/12 Pages) STMicroelectronics – DIGITAL SIGNAL PROCESSING IC FOR SPEECH AND AUDIO APPLICATIONS

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
I²C OR SPI SERIAL INTERFACE FOR EX-
TERNAL CONTROL
80-PIN TQFP, 0.65 mm PITCH
AUTOMOTIVE GRADE (FROM -40° C to
+85°C)
DESCRIPTION
The TDA755X family is a high performances, fully
programmable 24-bit, 50 MIPS Digital Signal
BLOCK DIAGRAM
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.
MULTIPLEXED BUS
I²C/SPI
FLASH
PORT
INTERFACE
SAI
ROM/RAM
RAM
8
FLAGS
DSP
CORE
PLL
L
DAC
R
L
ADC
R
ANALOG OUT
ANALOG IN
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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