Microchip LAN9254 2－3端口EtherCAT从控制器解决方案

Microchip公司的LAN9254是集成了以太网PHY和解复用HBI / 32 DIGIO的2/3端口EtherCAT®从控制器,包含全双工100BASE-TX收发器,支持100Mbps (100BASE-TX)工作. LAN9254支持HP Auto-MDIX,允许直接连接或通过LAN电缆,也支持EtherCAT P和信号质量指数PHY诊断. LAN9254包括EtherCAT从控制器和8KB双端口存储器(DPRAM)和8个现场总线存储器管理单元(FMMU),每个FMMU实现映射逻辑地址到物理地址. LAN9254还包含8个SyncManager,允许在EtherCAT主和本地应用间交换数据.每个SyncManager的取向和工作模式由EtherCAT主站来配置. LAN9254支持多种电源管理和叫醒特性.器件还包括I2C主EEPROM控制器,用来连接EEPROM,允许静态数据的存储和检索.LAN9254和IEEE 802.3/802.3u(快速以太网)兼容.单电源3.3V工作,主要用在马达运动控制,过程/工厂自动化,通信模块,接口卡和传感器,液压和气动阀门系统以及操作员界面.本文介绍了LAN9254亮点和主要优势,系统框图和内部框图,应用电路以及评估板EVB-LAN9254-DIGIO主要特性,框图,电路图和材料清单.

The LAN9254 is a 2/3-port EtherCAT slave controller with dual integrated Ethernet PHYs, each containing a full-duplex100BASE-TX transceiver that supports 100Mbps (100BASE-TX) operation. The LAN9254 supports HP Auto-MDIX,allowing the use of direct connect or cross-over LAN cables. EtherCAT P and Signal Quality Index PHY diagnostics aresupported.

The LAN9254 includes an EtherCAT slave controller with 8K bytes of Dual Port memory (DPRAM) and 8 Fieldbus MemoryManagement Units (FMMUs). Each FMMU performs the task of mapping logical addresses to physical addresses.

The EtherCAT slave controller also includes 8 SyncManagers to allow the exchange of data between the EtherCAT masterand the local application. Each SyncManagers direction and mode of operation is configured by the EtherCAT master.

Two modes of operation are available: buffered mode or mailbox mode. In the buffered mode, both the localmicrocontroller and EtherCAT master can write to the device concurrently. The buffer within the LAN9254 will alwayscontain the latest data. If newer data arrives before the old data can be read out, ...