Freescale 公司的M53281KIT 嵌入式 VoIP解决方案是VoIP 的参考平台，评估和开发套件，包括主板，基于240 MHz ColdFire® MCF53281 MCU系列的VoIP模快，VoIP语音处理软件以及Arcturus公司的中间件堆栈。完整的硬件和软件解决方案非常适合住宅区，工业和商业采用VoIP应用来嵌入声音，如用在住宅区，工业和商业的内部通信系统。本文主要介绍了MCF532x ColdFire®微处理器主要特性，方框图以及ColdFire M53281KIT 开发套件主要特性，方框图以及应用方框图。

MCF532x/7x Embedded VoIP Solution
The ColdFire Embedded VoIP Development Kit, the M53281KIT, is a compact, easy-to-integrate development system designed by Freescale and Freescale Design Alliance Partner, Arcturus Networks, Inc. and Encore Software Ltd, for enabling commercial VoIP functionality in embedded applications. The module is based on the 240 MHz Freescale ColdFire® MCF53281 microprocessor and includes all required system memory and terminations to enable most applications without the need for external circuitry.

MCF532x ColdFire®微处理器主要特性：
Version 3 ColdFire variable-length RISC processor core
System debug support
JTAG support for system level board testing
On-chip memories
16-Kbyte unified write-back cache
32-Kbyte dual-ported SRAM on CPU internal bus, accessible by core and non-core bus masters (e.g., DMA, FEC, LCD controller, and USB host and OTG)
Power management
Liquid Crystal Display Controller (LCDC)
Embedded Voice-over-IP (VoIP) system solution
SDR/DDR SDRAM Controller
Universal Serial Bus (USB) Host Controller
Universal Serial Bus (USB) On-the-Go (OTG) controller
Synchronous Serial Interface (SSI)
Fast Ethernet Controller (FEC)
Cryptography Hardware Accelerators
FlexCAN Module
Three Universal Asynchronous Receiver Transmitters (UARTs)
I2C Module
Queued Serial Peripheral Interface (QSPI)
Pulse Width Modulation (PWM) module
Real Time Clock
Four 32-bit DMA Timers
Software Watchdog Timer
Four Periodic Interrupt Timers (PITs)
Phase Locked Loop (PLL)
Interrupt Controllers (x2)
DMA Controller
FlexBus (External Interface)
Chip Configuration Module (CCM)
Reset Controller
General Purpose I/O interface



图1。MCF532x方框图
表1-1。MCF532x系列主要配置



Freescale Semiconductor proudly introduces an addition to the 68K/ColdFire family of
embedded controllers, a complete hardware and software solution for commercial VoIP
applications based on the popular MCF532x products. The solution is designed to help
embedded developers reduce time-tomarket by providing a complete hardware and software solution that can function as a reference design or a take-to-market product
platform. This flexibility gives developers the option to integrate fully developed module
boards or design their own application.
The system includes all required software components to develop a feature-rich product
and does not require an NRE, lowing overall system cost. The solution is supported by
a stand-alone development kit that is ready to demo out-of-the-box. This easy to use,
cost-effective solution will help simplify development and allow designers to enable
more applications with VoIP capability.

目标市场：
Commercial/Industrial Uses
Gas pump
Vending machine
Toll booth
ATM
Medical equipment
Production equipment
Intercom
Residential Uses
Security system
Child monitor
Telephone Uses
Basic VoIP telephone
应用：
Shell/telnet server
DHCP/NTP and networking applications
Webserver
Microwindows/NanoX for LCD GUI applications
ColdFire M53281KIT 开发套件主要特性：
The development kit includes a royalty-free uClinuxTM embedded software BSP, complete with source code, GNU tools, kernel and broad collection of applications and drivers.Telephony support is provided by the certified Arcturus voice and media middleware stack including audio subsystem. Arcturus device management middleware along with a host development board, power supply cable kit and manuals are also included.
Features:
- Freescale MCF53281 Microprocessor
- 240 MHz ColdFire v3 Core
- 8MB NOR Flash (expandable up to 16MB)
- 32MB DDR-SDRAM (expandable up to 64MB)
- 16 KB I/D-Cache
- 32 KB SRAM
- USB Host
- CAN 2.0 Bus
- 3 Serial Ports (max)
- I2C
- QSPI (Queued SPI)
- High Speed SSI interface
- 10/100 Ethernet
- Auto MDI/MDX PHY
- PoE Compatible
- Integrated CODEC with MIC / Preamp support
- Direct Analog Headset Compatible
- Enhanced Hardware Multiple Accumulate (eMAC)
- 4-channel 32-bit timer
- 4-channel PWM timer
- Up to 18 GPIO
- Reset Controller
- Temperature range -40 to +85ºC
- RoHS Complaint
- Compatible with Samtec MB1-150 or Header Connector
软件特性：
Tools and OS
- uClinux 2.6.19
- uClibc
- GNU Tools (GCC / GDB)
- BDM for GDB
- GDB server
Applications & Utils
- Shell
- Telnet server
- webserver
- Networking Apps
- Microwindows for LCD GUI applications
- Test programs
M53281KIT包括：
M53281MOD Module
Host board
Documentation
Video interface daughter card
Audio headset
P&E BDM wiggler
GNU tools
VoIP software
All licenses for kit use
Power supply
Out of the box VoIP demo



图2。ColdFire M53281KIT 开发套件外形图
应用方框图：

Intercom Systems
Door Phones
Screen Phones
Service Kiosks
Fast-Food Ordering Systems
Patient Monitoring
Equipment Support
Alarm Panels
Elevator Panels
Emergency Stations/Phones



图2。ColdFire M53281KIT 开发套件外形图
应用方框图：



图3。ColdFire M53281KIT 开发套件方框图（1）



图4。ColdFire M53281KIT 开发套件方框图（2）

来源：中电网