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PHY

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	Topics PHY Topic Home PHY (often "fye") is a common abbreviation for the physical layerPhysical layer The physical layer is level one in the seven level OSI model of computer networking.... of the OSI modelOSI model The Open Systems Interconnection Reference Model is a layered, abstract description for communications and computer network... . A PHY connects a link layer device (often called a MAC) to a physical medium such as an optical fibre or copper cable. A PHY typically includes a PCS (Physical Coding Sublayer) and a PMD (Physical Medium Dependent) layer. 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. Example uses EthernetFacts About Ethernet Ethernet is a large and diverse family of frame-based computer networking technologies for local area networks .... : A PHY chip (called PHYceiverPHYceiver PHYceiver is a device that operates at physical layer of OSI network model.... ) is commonly found on EthernetEthernet Ethernet is a large and diverse family of frame-based computer networking technologies for local area networks .... devices. Its purpose is digital access of the modulated link. Usually used together with an MIIMedia Independent Interface The Media Independent Interface is a standard interface used to connect a Fast Ethernet MAC-block to a PHY.... -chip or interfaced to a MicrocontrollerMicrocontroller A microcontroller is a computer-on-a-chip used to control electronic devices.... that takes care of the higher layer functions. USBUniversal Serial Bus Universal Serial Bus is a serial bus standard to interface devices.... : A PHY chip is integrated into most Universal Serial BusUniversal Serial Bus Universal Serial Bus is a serial bus standard to interface devices.... (USB) controllers in hosts or embedded systems and provides the bridge between the digital and modulated parts of the interface. IrDAInfrared Data Association Summary The Infrared Data Association defines physical specifications communications protocol standards for the short range exchang... : The Infrared Data AssociationInfrared Data Association The Infrared Data Association defines physical specifications communications protocol standards for the short range exchang... s IrDA specification includes an IrPHY specification for the physical layer of the data transport. S-ATASerial ATA Summary In computer hardware, Serial ATA is a computer bus technology primarily designed for transfer of data to and from a hard dis... : Serial ATA controllers like the VIAVIA Technologies VIA Technologies is a Taiwanese manufacturer of integrated circuits, mainly motherboard chipsets, CPUs, and memory, and is ... 6421 use a PHY.