Allwinner A20 - Emac; Overview

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6.11. EMAC

6.11.1. Overview

The Ethernet MAC Controller enables the host to transmit and receive data over Ethernet in

compliance with the IEEE 802.3-2002 standard. It supports 10M/100M external PHY with MII

interface in both full and half duplex mode. A 16KB SRAM is provided to keep continuous data

transmission. Besides, the flow control and DA/SA filter are also supported in EMAC module.

The EMAC features:

 Support industry-standard AMBA Host Bus (AHB) and fully comply with the AMBA Specification,

Revision 2.0, support 32-bit Little Endian bus

 Compatible with IEEE802.3standards

 Support 10/100Mbps data rate

 Support full and half duplex operations

 Support IEEE 802.3x flow control for full-duplex operation

 Support back-pressure flow control for half-duplex operation

 Support DA/SA filter

 Support loop back operation

 Provide MII Interface for external Ethernet PHY

 3KB FIFO for TX

 13KB FIFO for RX