Slave SPI Interface with clock speeds up to 50MHz for high throughput applications , Support SPI clock mode 0 and 3 , Support 10BASE T and 100BASE TX and 100M Fiber interface , Support HP Auto MDIX crossover function in 10BASE T and 100BASE TX , Support IEEE 802.3az Energy Efficient Ethernet (EEE) , Support interface for EEPROM to configure chip settings , Support back pressure flow control for Half Duplex mode , Support IEEE802.3x flow control for Full Duplex mode , Supports wakeup frame, link status change and magic packet events to generate remote wake on LAN (WOL) signal , Support IPv4/ TCP / UDP checksum generation and checking , Configurable of internal transmit/receive buffers within 16K byte memory , Built in integrated 3.3V to 1.8V low noise regulator for core and analog blocks , Support EMI (Class B) and HBM ESD Rating 8KV , Support Industrial Temperature Range: - 40℃ to +85℃ (DM9051I) , 3.3V I/O with 5V tolerant, DSP architecture PHY Transceiver, 0.18um process