TDA7580 datasheet(28/39 Pages) STMICROELECTRONICS

28 / 39 page

Functional description

TDA7580

28/39

Functional description

The TDA7580 IC offers a solution for high performance FM/AM car radio receivers. The high

processing power allows audio processing of both internal and external audio source.

The processing engine is based on a 24bit programmable DSP, with separate banks of

program and data RAMs. A number of hardware modules (peripherals) help in the algorithm

implementation of channel equalization 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 the slave and converts the second IF

path, as well as helps the first chip as co-processor.

8.1

24 bit DSP core

Some capabilities of the DSP are listed below:

●

Single cycle multiply and accumulate with convergent rounding and condition code

generation

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24 x 24 to 56-bit MAC Unit

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Double precision multiply

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Scaling and saturation arithmetic

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48-bit or 2 x 24-bit parallel moves

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64 interrupt vector locations

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Fast or long interrupts possible

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Programmable interrupt priorities and masking

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Repeat instruction and zero overhead DO loops

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Hardware stack capable of nesting combinations of 7 DO loops or 15 interrupts /

subroutines

●

Bit manipulation instructions possible on all registers and memory locations, also jump

on bit test

●

4 pin serial debug interface

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Debug access to all internal registers, buses and memory locations

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5 word deep program address history FIFO

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Hardware and software breakpoints for both program and data memory accesses

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Debug single stepping, instruction injection and disassembly of program memory

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