描述 Description

Microchip’s LAN9254 is a 3 port EtherCAT device controller (ESC) with dual integrated Ethernet PHYs which each provide a full-duplex 100BASE-TX transceiver and support 100Mbps (100BASE-TX) operation. The LAN9254 supports HP Auto-MDIX, allowing the use of direct connect or cross-over LAN cables. This device provides system developers a cost-effective solution for realizing EtherCAT device solutions.

The LAN9254 includes a 3 port EtherCAT device controller with 8K bytes of Dual Port memory (DPRAM), 8 SyncManagers, 8 Fieldbus Memory Management Units (FMMUs) and a 64-bit Distributed Clock.

This device includes feature additions over LAN9252 and LAN9253 which answer our customers' requests for enhanced cycle time, additional IO channels, integration and system level cost savings.

It supports multiple Process Data Interfaces - SPI/SQI, HBI and Digital IO. SPI and SQI (high speed SPI) provide a low pin count synchronous device interface that facilitates communication between the device and a host system. Whereas, the Host Bus Interface facilitates the same via a high-speed asynchronous device interface. For simple digital modules without micro-controllers, the LAN9254 can also operate in Digital I/O Mode where 32 digital signals can be controlled or monitored by the EtherCAT master. LAN9254 also supports a fully de-multiplexed host interface

The LAN9254 can be configured to operate via a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The internal linear regulator may also be disabled, allowing usage of a high efficiency external regulator for lower system power dissipation.

The LAN9254 is available in commercial, industrial and extended industrial temperature ranges and is packaged in 80 pin TQFN.

特性 Features

? 2/3-port EtherCAT slave controller with 8 Fieldbus Memory Management Units (FMMUs) and 8 SyncManagers
? Interfaces to most 8/16-bit embedded controllers and 32-bit embedded controllers with an 8/16-bit bus
? Optional demultiplexed host bus interface
? Dual Integrated Ethernet PHYs with HP Auto-MDIX
? 1.8V to 3.3V variable voltage I/O
? Integrated 1.2V core regulator for single 3.3V operation
? 32 DIGIOs
? TQFP package
? Clock daisy chain & Option to operate without ESI EEPROM
? Cable diagnostics
? Open / short
? Cable length

應(yīng)用 Application

? Stand alone IO modules
? Data Acquisition
? Process/Factory Automation
? Power Grid Automation
? Building Automation
? Power supplies and UPS

簡介

LAN9254屬于集成電路（IC）的控制器。由制造生產(chǎn)的LAN9254控制器該系列產(chǎn)品主要用于在采用不同通信協(xié)議和/或信令方法的端點(diǎn)之間提供信息連接。示例包括將 I2C 總線連接到 UART，將 USB 連接到 I2C、SPI、以太網(wǎng)或 UART、以太網(wǎng) MAC 和 PHY 等的器件。此外，還包括用于通過為點(diǎn)對點(diǎn)通信設(shè)計(jì)的接口建立多路連接的器件，例如 USB 集線器控制器。