PHY芯片简介

原文:https://en.wikipedia.org/wiki/PHY_(chip)

PHY is an abbreviation for the physical layer of the OSI model and refers to the circuitry required to implement physical layer functions.

A PHY connects a link layer device (often called MAC as an abbreviation formedia access control) to a physical medium such as an optical fiber orcopper cable. A PHY device typically includes a Physical Coding Sublayer(PCS) and a Physical Medium Dependent (PMD) layer.[1] The PCS encodes and decodes the data that is transmitted and received. The purpose of the encoding is to make it easier for the receiver to recover the signal.

More specifically, the Ethernet PHY is a chip that implements the hardware send and receive function of Ethernet frames; it interfaces between the analog domain of Ethernet's line modulation and the digital domain of link-layer packet signaling.[2] The PHY usually does not handle MAC addressing, as that is the link layer's job. Similarly, Wake-on-LAN and Boot ROMfunctionality is implemented in the network interface card (NIC), which may have PHY, MAC and other functionality integrated into one chip or as separate chips.The Ethernet PHY is a component that operates at the physical layer of theOSI network model. It implements the Ethernet physical layer portion of the 1000BASE-T, 100BASE-TX, and 10BASE-T standards.

Examples include the Microsemi SimpliPHY and SynchroPHY VSC82xx/84xx/85xx/86xx family and Marvell Alaska 88E1310/88E1310S/88E1318/88E1318S Gigabit Ethernet transceivers.

An Ethernet physical transceiver can also be referred to as a physical layer transmitter and/or receiver, a physical layer transceiver, a PHY transceiver, a PHYceiver, or simply a PHY. The term PHYceiver is often shown as being TM (Trade Marked) but is not currently registered with TESS United States Patent and Trademark Office.[citation needed]


译文:


评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值