A Beginner’s Guide to Ethernet 802.3 (EE-269) Page 4 of 26 Overview Figure 4 shows layer 1 and layer 2 in detail and describe all sub-layers of the PHY. For further information, refer to specification IEEE802.3-2002. L Generally, PHYs work in layer 1, and Ethernet MACs are placed in layer 2. PHY and MAC Layer 100-Mbit Network. The USB-2-MDIO GUI enables access to status and control registers of our Ethernet PHYs through the Serial Management Interface. It uses USB to communicate with the PHY. The GUI is compatible with the LaunchPad™ Development Kit for MSP430™ MCUs and PHY EVMs that have an on-board MSP430 MCU.
The Marvell Fast Ethernet physical layer (PHY) transceivers offer the industry’s lowest power dissipation, smallest form factor, highest performance, and the most advanced feature set. The octal members of the Fast Ethernet PHY family, the 88E3082 and 88E3083 devices, significantly lead the industry with the lowest power consumption (under 150 mWatts per port), enabling network systems manufacturers to decrease system cost by reducing both power supply and fan requirements.
The Fast Ethernet PHYs transceivers feature the Marvell Virtual Cable Tester® (VCT) technology, allowing end-users, IT managers and networking equipment manufacturers to analyze quickly and remotely the quality and attributes of the cable, avoiding unnecessary equipment returns and on-site service calls.