DSP56857 datasheet(4/53 Pages) FREESCALE

4 / 53 page

56857 Technical Data, Rev. 6

Freescale Semiconductor

Part 1 Overview

1.1 56857 Features

1.1.1

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

•

Four (4) internal data buses

•

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

1.1.2

Memory

•

Harvard architecture permits up to three (3) simultaneous accesses to program and data memory

•On-Chip Memory

—40K

× 16-bit Program RAM

—24K

× 16-bit Data RAM

—1K

× 16-bit Boot ROM

— Chip Select Logic used as dedicated GPIO

1.1.3

Peripheral Circuits for 56857

•

General Purpose 16-bit Quad Timer*

•Two Serial Communication Interfaces (SCI)*

•

Serial Peripheral Interface (SPI) Port*

•

Two (2) Enhanced Synchronous Serial Interface (ESSI) modules*

•

Computer Operating Properly (COP)/Watchdog Timer

•

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

•

Six (6) independent channels of DMA

DSP56857 Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc

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