Ethernet Media Access Controller; Features Of The Ethernet Mac; Mac - Altera Cyclone V Device Handbook

2013.12.30
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The hard processor system (HPS) provides two Ethernet media access controller (EMAC) peripherals. Each
EMAC can be used to transmit and receive data at 10/100/1000 Mbps over Ethernet connections in compliance
with the IEEE 802.3 specification. The EMACs are instances of the Synopsys
10/100/1000 Ethernet MAC (DWC_gmac).
The EMAC has an extensive memory-mapped control and status register (CSR) set, which can be accessed
by the ARM Cortex-A9
For an understanding of this chapter, you should be familiar with the basics of IEEE 802.3 media access
control (MAC).
For complete information about IEEE 802.3 MAC, refer to the IEEE Std 802.3 2008 Part 3: Carrier sense
multiple access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, available
on the IEEE website (http://standards.ieee.org).
Related Information
IEEE Standards Association website
For more information on the IEEE standards, refer to the IEEE Standards Association website.

Features of the Ethernet MAC

Here is a summary of the features supported by the EMAC peripheral.

MAC

• IEEE 802.3-2008 compliant
• Data rates of 10/100/1000 Mbps
• IEEE 802.3x flow control in full-duplex
• Full duplex and half duplex modes
• IEEE 802.3x flow control automatic transmission of zero-quanta pause frame on flow control input
deassertion
• Optional forwarding of received pause control frames to the user
• Packet bursting and frame extension in 1000 Mbps half-duplex
• IEEE 802.3x flow control in full-duplex
• Back-pressure support for half-duplex
• IEEE 1588-2002 and IEEE 1588-2008 precision networked clock synchronization
• IEEE 802.3-az, version D2.0 for Energy Efficient Ethernet (EEE)
• IEEE 802.1Q virtual local area network (VLAN) tag detection for reception frames
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Ethernet Media Access Controller

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