VSC8541XMV-02

VSC8541-02 and VSC8541-05 Datasheet Single Port Gigabit Ethernet Copper PHY with GMII/RGMII/MII/RMII InterfacesContents 1 Revision History . 1 1.1 Revision 4.2 . 1 1.2 Revision 4.1 . 1 1.3 Revision 4.0 . 1 2 Overview 2 2.1 Key Features 2 2.1.1 Superior PHY and Interface Technology 2 2.1.2 Synchronous Ethernet and IEEE 1588 Time Stamp Support 2 2.1.3 Fast Link Up/Link Drop Modes . 3 2.1.4 Best-in-Class Power Consumption 3 2.1.5 Key Specifications . 3 2.2 Block Diagram . 3 3 Functional Descriptions . 4 3.1 Operating Modes . 4 3.2 MAC Interface . 4 3.2.1 RGMII MAC Interface Mode . 4 3.2.2 GMII/MII Interface Mode 5 3.2.3 RMII Mode . 6 3.2.4 MAC Interface Edge Rate Control . 7 3.3 Hardware Mode Strapping and PHY Addressing . 8 3.3.1 CLKOUT Signal Configuration 9 3.3.2 Managed Mode . 9 3.3.3 Unmanaged Mode . 9 3.3.4 GMII/MII or RGMII/RMII MAC Interface Mode . 11 3.3.5 CLKOUT Frequency Selection 11 3.3.6 Forced 1000BASE-T Mode . 11 3.4 Cat5 Twisted Pair Media Interface . 11 3.4.1 Voltage Mode Line Driver 11 3.4.2 Cat5 Auto-Negotiation and Parallel Detection . 12 3.4.3 Automatic Crossover and Polarity Detection 12 3.4.4 Manual MDI/MDIX Setting 13 3.4.5 Link Speed Downshift . 13 3.4.6 Energy-Efficient Ethernet . 13 3.4.7 Ring Resiliency 14 3.5 Reference Clock 14 3.6 Ethernet Inline-Powered Devices 15 3.7 IEEE 802.3af Power-over-Ethernet Support . 17 3.8 ActiPHY Power Management 17 3.8.1 Low Power State . 18 3.8.2 Link Partner Wake-Up State 18 3.8.3 Normal Operating State 18 3.9 Media Recovered Clock Output . 18 3.9.1 Clock Output Squelch . 18 3.10 Serial Management Interface . 18 3.10.1 SMI Frames . 19 3.10.2 SMI Interrupt 20 3.11 LED Interface . 20 3.11.1 LED Modes . 20 VMDS-10513 VSC8541-02 and VSC8541-05 Datasheet Revision 4.2 ii