MVI71-DFNT   以太网接口模块 是MAC与PHY之间的接口

型号：MVI71-DFNT 

MVI71-DFNT 以太网接口模块是一个用于在以太网网络和设备之间传送帧的模块。它通常包括一个双工端口，该端口可操作以在以太网网络和设备之间传送帧，以及一个将双工端口的接收部分耦合到发送部分的路径。在这个路径中，通常还会设置队列。评估装置会耦合到队列，并确定接收的帧是否寻址到以太网接口模块以及帧类型字段是否包含特定的帧类型。

MVI71-DFNT 以太网接口模块可以操作在不同的模式中。例如，它可以操作在第一模式中，使得每个接收到的帧都被回送出全双工端口；或者它可以在第二模式中操作，使得满足预定评估标准的每个接收到的帧被回送出双工端口，而那些接收到的不满足预定评估标准的帧则被丢弃。

具体到硬件实现，以太网接口模块通常包括MAC（Media Access Control，媒体访问控制）控制器和PHY（Physical Layer，物理层）接口。MAC控制器负责处理与数据链路层相关的任务，如帧的封装和解封装等，而PHY接口则负责处理物理层上的信号传输和接收。

在以太网接口模块中，还会涉及到MII（Media Independent Interface，介质无关接口）等接口标准。MII是IEEE-802.3定义的行业标准，是MAC与PHY之间的接口。还有一些简化的MII接口，如RMII（Reduced Media Independent Interface），它精简了MII接口，节省了一半的数据线。

总的来说，MVI71-DFNT 以太网接口模块是以太网通信中的关键组成部分，它负责实现设备与网络之间的帧传输，以及帧的接收、处理和转发等功能。不同的以太网接口模块可能具有不同的特性和功能，以适应不同的应用需求和网络环境。

Model: MVI71-DFNT

The MVI71-DFNT Ethernet interface module is a module for transferring frames between Ethernet networks and devices. It typically includes a duplex port that can be operated to transfer frames between the Ethernet network and devices, and a path that couples the receiving part of the duplex port to the sending part. In this path, queues are also typically set up. The evaluation device is coupled to the queue and determines whether the received frame is addressed to the Ethernet interface module and whether the frame type field contains a specific frame type.

The MVI71-DFNT Ethernet interface module can operate in different modes. For example, it can operate in the first mode so that every received frame is sent back out of the full duplex port; Or it can operate in the second mode such that every received frame that meets the predetermined evaluation criteria is sent back out of the duplex port, and those that do not meet the predetermined evaluation criteria are discarded.

Specific to the hardware implementation, Ethernet interface modules usually include a MAC (Media Access Control) controller and a PHY (Physical Layer) interface. The MAC controller handles tasks related to the data link layer, such as encapsulation and unencapsulation of frames, while the PHY interface handles signal transmission and reception on the physical layer.

An Ethernet Interface module also involves interface standards such as Media Independent Interface (MII). MII is an industry standard defined by IEEE-802.3 and is the interface between MAC and PHY. There are also simplified MII interfaces, such as RMII (Reduced Media Independent Interface), which simplifies the MII interface and saves half of the data lines.

In general, the MVI71-DFNT Ethernet interface module is a key component in Ethernet communication, which is responsible for the transmission of frames between devices and networks, as well as the functions of receiving, processing and forwarding frames. Different Ethernet interface modules may have different features and functions to adapt to different application requirements and network environments.