1.2.5.6 Ethernet EMAC Driver Library

The EMAC module implements a 10/100 Ethernet MAC compatible with the IEEE 802.3 standard using an address checker, statistics and control registers, receive and transmit blocks, and a DMA interface.

Embedded Characteristics

• EMAC0 supports MII and RMII Interlaces to the Physical Layer (EMAC1 supports RMII only)
• Compatible with IEEE Standard 802.3
• 10 and 100 Mbit/s Operation
• Full- and Half-duplex Operation
• Statistics Counter Registers
• Interrupt Generation to Signal Receive and Transmit Completion
• DMA Master on Receive and Transmit Channels
• Transmit and Receive FIFOs
• Automatic Pad and CRC Generation on Transmitted Frames
• Automatic Discard of Frames Received with Errors
• Address Checking Logic Supports Up to Four Specific 48-bit Addresses
• Supports Promiscuous Mode Where All Valid Received Frames are Copied to Memory
• Hash Matching of Unicast and Multicast Destination Addresses
• External Address Matching of Received Frames
• Physical Layer Management through MDIO Interface
• Half-duplex Flow Control by Forcing Collisions on Incoming Frames
• Full-duplex Flow Control with Recognition of Incoming Pause Frames and Hardware Generation of Transmitted Pause Frames
• Support for 802.1Q VLAN Tagging with Recognition of Incoming VLAN and Priority Tagged Frames
• Multiple Buffers per Receive and Transmit Frame
• Wake-on-LAN Support
• Jumbo Frames Up to 10240 bytes Supported