Fully complies with IEEE 802.3 / IEEE 802.3u 10Base-TX/100Base-TX, ANSI X3T12 TP-PMD 1995 standards, Support HP MDI/MDI-X auto crossover function (HP Auto-MDIX), Support Auto-Negotiation function, compliant with IEEE 802.3u, Fully integrated Physical layer transceiver, On-chip filtering with direct interface to magnetic transformer, Selectable repeater or node mode, Selectable MII or RMII (Reduced MII) mode for 100Base-TX and 10Base-TX, Selectable MII or GPSI (7-Wired) mode for 10Base-TX, Selectable full-duplex or half-duplex operation, MII management interface with maskable interrupt output capability, Provide Loopback mode for easy system diagnostics, Supports industrial-temperature (-40℃ ~ +85℃), LED status outputs indicate Link/Activity, Speed 10/100 and Full-duplex/Collision, Support Dual-LED optional control, Single low power supply of 3.3V with advanced CMOS technology, Built-in 3.3V to 1.8V regulator, Lower Power consumption modes: Power Reduced mode (cable detection), Power Down mode, Support 50MHz clock output in RMII mode, Compatible with 3.3V and 5.0V tolerant I/Os, DSP architecture PHY Transceiver, 48-pin LQFP