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DSP56858 General Description

? 120 MIPS at 120MHz

? 40K x 16-bit Program SRAM

? 24K x 16-bit Data SRAM

? 1K x 16-bit Boot ROM

? Access up to 2M words of program memory or 8M data memory

? Chip Select Logic for glue-less interface to ROM and SRAM

? Six (6) independent channels of DMA

? Two (2) Enhanced Synchronous Serial Interfaces (ESSI)

? Two (2) Serial Communication Interfaces (SCI)

? Serial Port Interface (SPI)

? 8-bit Parallel Host Interface

? General Purpose 16-bit Quad Timer

? JTAG/Enhanced On-Chip Emulation (OnCE?) for unobtrusive, real-time debugging

? Computer Operating Properly (COP)/Watchdog Timer

? Time-of -Day (TOD)

? 144 LQFP and 144 MAPBGA packages

? Up to 47 GPIO

6858 Features

Digital Signal Processing Core

? Efficient 16-bit engine with dual Harvard architecture

? 120 Million Instructions Per Second (MIPS) at 120MHz core frequency

? Single-cycle 16 × 16-bit parallel Multiplier-Accumulator (MAC)

? Four (4) 36-bit accumulators including extension bits

? 16-bit bidirectional shifter

? Parallel instruction set with unique DSP addressing modes

? Hardware DO and REP loops

? Three (3) internal address buses and one (1) external address bus

? Four (4) internal data buses and one (1) external data bus

? Instruction set supports both DSP and controller functions

? Four (4) hardware interrupt levels

? Five (5) software interrupt levels

? Controller-style addressing modes and instructions for compact code

? Efficient C-Compiler and local variable support

? Software subroutine and interrupt stack with depth limited only by memory

? JTAG/Enhanced OnCE debug programming interface