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基于MCF51CN128设计的以太网连接参考方案
发布时间:2017-03-17 阅读：次 [打印文章] [关闭窗口]- 绕行电感ee-running on-chip low-power oscillator (1 kHz) for cyclic wake-up without external components; runs in all MCU modes
– MTIM—Two 8-bit resolution modulo timers with 8-bit插件电感器 prescaler
• Input/Output
– Up to 70 general-purpose inp插件电感器ut/output (GPIO) pins, all with pin mux controls to select alternate functions
– 16 keyboard interrupt (KBI) pins with selectable polarity
– Hysteresis and configurable pull-up device or input filtering on all input pins; configurable slew rate and drive strength on all output pins 16 Rapid GPIO光电感器 pins connected to the CPU’s high-speed local bus with set, clear, and toggle functionality (PTD and PTF)
MCF51CN128目标应用:
一体电感Building control
Industrial operator interfaces
Consumer and industrial appliances
Medical monitoring and instrumentation
Point-of-sale and courier systems
Security and building control systems
图1.MCF51CN128方框图
RDMCF51CN128: Serial to Ethernet Bridge
The most common use of this reference design will be to integrate old MCU projects to the internet. The connection between these legacy microcontrollers will be by SCI and SPI. The MCU used is the MCF51CN128. As a second goal, customers don’t need to know about ETH, or in certain cases, a little knowledge will be required, though enough information is provided for customer education in Lasko Ethernet TCP/IP implementation.
图2.MCF51CN128以太网连接参考设计外形图
以太网连接参考设计主要特性:
The following list shows some of the reference design features:
– Hardware:
Ethernet Minimal System in 1.15’’x1.55’’
RTOS+TCP/IP highly coupled and customized for a very small memory footprint
Webserver supporting HTTP 2.0
File System (FAT16) thru uSD socket
Bridges to UART, SPI and IIC to Ethernet easily
Serial Header that allows to use signals as needed
Sensors (SPI and I2C) already on board
– Sofware:
lwIP 1.3.0 + FreeRTOS v5.3.0
Layered Software for easy migration and upgrade of SW drivers
The following reference design implements:
Web Server
Email Client
FTP Server
SD card driv扁平型电感er
FAT16 file system
Serial Bridge
图3.以太网连接参考设计电路图(1)
图4.以太网连接参考设计电路图(2)
图5.以太网连接参考设计电路图(3)
图6.以太网连接参考设计电路图(4)
PCB被动组件的隐藏行为和特性分析 文章摘自：凌力尔特技术论坛-与非网（https://linear.专注于大电流电感设计、制造：电话 ：181-2638-2251/module/forum/thread-593971-1-1.html）
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德州仪器 (TI）近日宣布推出业界首款 12-V，10-A，10-MHz 串联电容降压转换器，电流密度超过基于FPGA实现的CPCI数据通信本文设计的系统采用PLX公司生产的CPCI协议转换芯片PCI9054，通过Verilog HDL语言在FPGA中产生相应的控制信号，完成对数据的快速读写，从而实现了与CPCI总线的高速数据通信。高速数
