Features:

 * IEEE 802.3. Compatible Ethernet Controller

 * Fully Compatible with 10/100/1000Base-T Networks

 * Integrated MAC and 10Base-T PHY

 * Supports One 10Base-T Port with Automatic

 Polarity Detection and Correction

 * Supports Full and Half-Duplex modes

 * Programmable Automatic Retransmit on Collision

 * Programmable Padding and CRC Generation

 * Programmable Automatic Rejection of Erroneous Packets

 * SPI Interface with Clock Speeds up to 20 MHz

Specifications:

 * SPI Interface Clock Speed: up to 20 MHz

 * Buffer Size: 8 KB

 * Operating Voltage: 3.1 V to 3.6 V (3.3 V typical)

 * 5 V Tolerant Inputs