Gigabit Ethernet Media Access

The Gigabit Ethernet Media Access Controller is highly integrated Gigabit Ethernet MAC solution for Gigabit applications. It simplifies design of Gigabit systems and reduces time - to - market. It is also a companion device for any Network Processor and enables glueless Gigabit Ethernet backbone connectivity.

The GEMAC (Gigabit Ethernet Media Access Controller) core implements the Ethernet Media Access Control (MAC) protocol according to IEEE 802.3 specification. The MAC has a standard Gigabit Media Independent Interface (GMII) to connect to any PHY interface. The core can be used in various integrated applications. A single channel MAC with PCI controller would provide an ideal solution for inexpensive NIC cards.

The complete modular design of the cores facilitates easy customization to include value added and distinguishing features.

The GEMAC implements half duplex functions such as Carrier Extension and Packet Bursting. In full duplex mode, the GEMAC implements both symmetrical and asymmetrical flow control via IEEE 802.3x Pause MAC Control frames.

Product Specifications :

• Fully synthesizable Register Transfer Level (RTL) Verilog HDL core.
• Fully functionally verified core. (Verilog)
• Targeted to ASIC (TSMC (0.15, 0.18 and 0.2 micron))
• Standard GMII Physical Interface
• Clock Frequency : 130MHz (TSMC)

Product Options :

• Adaptations :
  • 32 bit PCI Host Interface (PCI MAC) - available
  • 64 Kbyte (Max) Transmit and 64 Kbyte (Max) Receive External Buffer Memory Interface in place of Internal FIFO - available
  • Powerful statistics database Management Information Database (MIB based on RFC2665) providing information to external user management object - available
  • IEEE 802.1q VLAN compliant - available
  • Configurable Jumbo frames of any length - available
  • Programmable inter - frame gap adjustment - available
  • Capable of loop - back diagnosis mode - available
  • Supports 802.3ad Link Aggregation and 802.ac Tagging - available
  • Supports Ten Bit Interface (TBI) - available
  • Supports IEEE 802.3 - 2002 specification
• Add - ons :
  • 16 bit MII (Media Independent Interface) - available
  • RMII (6 pin Reduced MII) - available
  • PCS Interface physical layer attachment (PMA) for 1000Base - X (i.e. 8b / 10b encoding / decoding and SERDES for transmission / reception) available
  • SMII (2 pin Serial MII) Interface possible

• Highly Integrated Gigabit Ethernet Media Access Controller (MAC) core
• Compliance with IEEE 802.3-2000 specifications
• Backward Compatible with 100/10 Mbits.
• Network data bandwidth: 1 Gbps in CSMA/CD (Half Duplex) and 2 Gbps in Full Duplex.
• Generic Host Interface
• Configurable flow control with MAC control pause frames compliant to IEEE 802.3x for frame-based flow control
• Reconciliation Physical Sub-layer with GMII included
• 8K Receive FIFO and 4K Transmit FIFO
• Carrier Extension and Packet Bursting
• Supports 802.3z, Gigabit Ethernet over optical fibres
• Supports 802.3ab, Gigabit Ethernet over copper
• Supports 802.3u 100 Mbits Fast Ethernet
• 2 Independent Clock Domains

• Fully synthesizable Register Transfer Level (RTL) Verilog HDL core.
• Fully functionally verified core. (Verilog)
• Targeted to ASIC (TSMC (0.15, 0.18 and 0.2 micron))
• Standard GMII Physical Interface
• Clock Frequency: 130MHz (TSMC)

• Fully synthesizable Register Transfer Level (RTL) Verilog HDL core