TDA7580 Datasheet, PDF (22/31 Pages) STMicroelectronics – FM/AM DIGITAL IF SAMPLING PROCESSOR

TDA7580
FUNCTIONAL DESCRIPTION
The TDA7580 IC is a complete solution for high performance FM/AM Car Radio receivers, and has high pro-
cessing power to allow Audio processing of both internal and external Audio source.
The processing engine is made of programmable DSP, with separate banks of Program and Data RAMs. In ad-
dition a number of hardware modules (peripherals) which help in the algorithm implementation of channel equal-
ization, and FM/AM Baseband post-processing.
The HW architecture allows to perform Dual Tuner Diversity. In this case two TDA7580 are needed: one device
must be configurated as Master, generates the clock and controls the main data interfaces. The second device
becomes Slave and converts the second IF path, as well as helps the first chip as co-processor.
24-BIT DSP CORE
Some capabilities of the DSP are listed below:
s Single cycle multiply and accumulate with convergent rounding and condition code generation
s 24 x 24 to 56-bit MAC Unit
s Double precision multiply
s Scaling and saturation arithmetic
s 48-bit or 2 x 24-bit parallel moves
s 64 interrupt vector locations
s Fast or long interrupts possible
s Programmable interrupt priorities and masking
s Repeat instruction and zero overhead DO loops
s Hardware stack capable of nesting combinations of 7 DO loops or 15 interrupts/subroutines
s Bit manipulation instructions possible on all registers and memory locations, also Jump on bit test
s 4 pin serial debug interface
s Debug access to all internal registers, buses and memory locations
s 5 word deep program address history FIFO
s Hardware and software breakpoints for both program and data memory accesses
s Debug Single stepping, Instruction injection and Disassembly of program memory
DSP PERIPHERALS
s Clock Generation Unit (CGU)
s Stereo Decoder (HWSTER)
s Serial Audio Interface (SAI)
s Tuner AGC Keying DAC (KEYDAC)
s Programmable I/O Interface (I2C/BSPI)
s Asynchronous Sample Rate Converter (ASRC)
s IF Band Pass Sigma Delta Modulator (IFADC)
s Digital Down Converter (DDC)
s Discriminator (CORDIC)
s RDS
s Tuner Diversity HS³I
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