飞思卡尔(Freescale)公司的MCF5227x是32位ColdFire微控制器系列,集成了LCD控制器和触摸屏模块,USB OTG模块以及CAN模块,128KB SRAM和DMA 控制器,为人机接口和工业控制应用提供了更多控制,更多灵活性和更多性能选择.本文介绍了MCF5227x 32位ColdFire微控制器的主要特性,方框图以及MCF5227x评估板的主要特性和详细的电路图.

Freescale’s MCF5227x ColdFire microprocessor family is the ideal device for developers looking to add more control options to their consumer or industrial applications. Featuring an integrated LCD controller and touchscreen module, the MCF5227x family is designed to provide an easy way to add support for graphical LCD interfaces to industrial systems.

The MCF5227x devices are also equipped with integrated USB On-The-Go (OTG)

and CAN modules giving developers the ability to upgrade or standardize their serial

communications. The crossbar switch allows the 128K of integrated SRAM to be

accessed by the core, DMA, USB OTG and LCD controller, which helps improve performance.

These and other features make the MCF5227x devices ideal for human interface applications that require a broad range of peripherals and high performance for multi-functional industrial and consumer applications.

The MCF5227x family is also easy to use. Freescale provides a comprehensive suite of

development tools to help developers design in these devices quickly and easily.

MCF5227x ColdFire微处理器特性:

MCF5227x ColdFire® Microprocessor Features

Version 2 ColdFire® Core with EMAC

Up to 159 Dhrystone 2.1 MIPS166.67 MHz

Kbytes configurable cache (instruction only, data only, or split instruction/data)

128 Kbytes internal SRAM

Support for booting from SPI-compatible flash, EEPROM, and FRAM devices

Crossbar switch technology (XBS) for concurrent access to peripherals or RAM from multiple bus masters

16 channel DMA controller

16- or 32-bit SDR/DDR controller

USB 2.0 On-the-Go controller

Liquid crystal display controller with support up to 800 × 600 pixels

ADC and touchscreen controller

FlexCAN module

4 32-bit timers with DMA support

DMA supported serial peripheral interface (DSPI)

3 UARTs

I2C bus interface

Synchronous serial interface (SSI)

Plus-width modulator (PWM)

Real-time clock (RTC)

Two programmable interrupt controllers (PIT)

图1.MCF5227x 方框图

Target Applications

Consumer

Operator Interfaces

Security Systems

HVAC Control Systems

Digital Picture frames

Industrial & Medical

Factory Maintenance Systems

Diagnostic Equipment

Medical Monitoring Equipment

Handheld Point of Sale

Badge Printers

MCF5227x评估板(EVB)

The M52277 Evaluation Board (EVB) is based on the V2 ColdeFire Core with EMAC. This board is shipped with the MCF52277 populated to allow for the evaluation of all of the functionality of this part.

This board was designed as a validation platform with maximum flexibility. Where possible weve also designed for power and speed but the primary goal of this system was flexibility

MCF5227x评估板(EVB)主要特性:

M52277 External Interfaces

On Board Sharp 240 x 320 color touch screen LCD panel

60 pin external LCD connector

Synchronous Serial Interface (SSI) connected to audio CODEC

USB Support

MCF52277 on-chip OTG transceiver with device, host, and OTG support (Mini-AB receptacle)

Crystal/Clock

BDM/JTAG

Two UARTs

FlexBus

Timers

External Interrupts

CAN Support

External CAN transceiver (DB9 connector)

University Breakout Connector for serial interfaces (I2C, QSPI, GPIO, etc.)

Memory Subsystems

32M x 16 Mobile DDR

8M x 16 NOR Flash

16Mbit Serial Boot Flash

Power

Inputs

5 V Input to the voltage regulator circuitry

Regulated On-board voltages:

3.3 V - I/O Voltage

1.8 V - Mobile DDR and Flash Voltage

1.5 V - MCF52277 Core Voltage