
MOTOROLA
Introduction
1-1
Section 1
Introduction
1.1
MCF5249 OVERVIEW
This document provides an overview of the MCF5249 ColdFire processor and general descriptions of the
MCF5249 features and modules.
The MCF5249 was designed as a system controller/decoder for MP3 music players, especially portable
MP3 CD players. The 32-bit ColdFire core with Enhanced Multiply Accumulate (EMAC) unit provides
optimum performance and code density for the combination of control code and signal processing required
for MP3 decode, file management, and system control.
Low power features include a hardwired CD ROM decoder, advanced 0.18um CMOS process technology,
1.8V core power supply, and on-chip 96KByte SRAM. MP3 decode requires less than 20MHz CPU
bandwidth and runs in on-chip SRAM with external access only for data input and output.
The MCF5249 is also an excellent general purpose system controller with over 125 Dhrystone 2.1 MIPS @
140MHz performance at a very competitive price. The integrated peripherals and EMAC allow the
MCF5249 to replace both the microcontroller and the DSP in certain applications. Most peripheral pins can
also be remapped as General Purpose I/O pins.
1.2
MCF5249 FEATURE INTRODUCTION
The MCF5249 integrated microprocessor combines a Version 2 ColdFire processor core operating at
140MHz with the following modules.
DMA controller with 4 DMA channels
Integrated Enhanced Multiply-accumulate Unit (EMAC)
8-KByte Direct Mapped Instruction Cache
96-KByte SRAM (A 64K and a 32K bank)
Operates from external crystal oscillator
Supports 16-bit wide SDRAM memories
Serial Audio Interface which supports IIS and EIAJ audio protocols
Digital audio transmitter and two receivers compliant with IEC958 audio protocol
CD-ROM and CD-ROM XA block decoding and encoding function
Two UARTS
Queued Serial Peripheral Interface (QSPI) (Master Only)
Two timers
IDE and SmartMedia interfaces
Analog/Digital Converter
Flash Memory Card Interface
Two I2C modules1
System debug support
General Purpose I/O pins shared with other functions
1. I2C is a proprietary Philips bus.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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