TDA7500A Datasheet, PDF (1/40 Pages) STMicroelectronics – DIGITAL AM/FM SIGNAL PROCESSOR

TDA7500A
DIGITAL AM/FM SIGNAL PROCESSOR
s FULL SOFTWARE FLEXIBILITY WITH TWO
24X24 BIT DSP CORES
s SOFTWARE AM/FM, AUDIO AND SOUND-
PROCESSING
s HARDWARE RDS FILTER, DEMODULATOR
& DECODER
s INTEGRATED CODEC (4ADCs, 6DACs)
s IIC AND SPI CONTROL INTERFACES
s SPI DEDICATED TO DISPLAY MICRO
s 6 CHANNEL SERIAL AUDIO INTERFACE
(SAI)
s SPDIF RECEIVER WITH SAMPLE RATE
CONVERTER
s EXTERNAL MEMORY INTERFACE (EMI)
s DOUBLE DEBUG INTERFACE
s ON-CHIP PLL
s 5V-TOLERANT 3V I/O INTERFACE
s 12x2 MULTIFUNCTION GENERAL PURPOSE
I/O PORTS
BLOCK DIAGRAM
analog in
TQFP100 (with slug down)
ORDERING NUMBER: TDA7500A
DESCRIPTION
The TDA7500A is an integrated circuit implementing
a fully digital, integrated and advanced solution to
perform the signal processing in front of the power
amplifier and behind the AM/FM tuner or any other
audio source. The chip integrates two 45 MIPs DSP
cores: one for stereo decoding, noise blanking, weak
signal processing and multipath detection and one for
sound processing, Dolby B, echo and noise cancel-
ling for the telephone.
analog audio out
ADC-ref
ADCVDD
ADCGND
AVDD
AGND
CLK in
6 Ch. Audio Bus ₂
receive bit&word clk
digital audio in
SPDIF audio in
4
Σ∆ Σ∆
Decimation
Filter
Σ∆ Σ∆
Decimation
Filter
PLL Clock
Generator
Crystal
Oscillator
SAI 6ch.
Receiver
SPDIF 2ch.
Interface
2ch Sample
Rate
Converter
SC SC SC SC SC SC
Filter Filter Filter Filter Filter Filter
Noise
Shaper
Noise
Shaper
Noise
Shaper
Oversampl. Oversampl. Oversampl.
Filter
Filter
Filter
RDS
Filter
Grp & blk
Demod. ^{sync., error}
correction
SPI
10 word SPI 1
receive stack
IIC / SPI 1
SPI 2
SAI Transmitter
External Memory Interface
SRAM 4Mx8
DRAM 128kx4
DAC-ref
RDS
RDS bit/blk Int.
4
RDS SPI
Error corr. RDS blocks
or RDS clk, dat, qual
4 _{λP control}
4 _{Display λP}
3
2
6 Channel
Audio Bus
8+3
17
DSP1 Orpheus Core
including 12 GPIO´s
Dolby B
FM processing,
AM processing,
Traffic memorization
Debug Interface
X Ram 1024
Y Ram 1024
P Ram 2048
P Rom 256
Xchg
Interf.
X Ram 1024
Y Ram 1024
P Ram 5632
P Rom 512
DSP0 Orpheus Core
including 12 GPIO´s
Audio processing,
Sound processing,
Noise & Echo Canc.
Debug Interface
Int
Reset
4
4
VDD
GND
2
Test
4
December 2001
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