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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