SoftIP IP Group of Alphawave IP
SoftIP IP Group of Alphawave IP

25G/10G/2.5G/1G Quad-Mode Ethernet MAC


25G/10G/2.5G/1G Quad-Mode Ethernet MAC

The fully integrated Physical Coding Sublayer (PCS), KR FEC (IEEE Clause 74 – fire code FEC), SGMII / 1000BASE-X and Media Access Controller (MAC) core for 25Gbps, 10Gbps, 2.5Gbps/1.25Gbps Ethernet applications is compliant with IEEE 802.3 standard and SGMII specification 1.6. The interface to the PMA supports a single channel Quad-mode bi-directional, serial interface. The PCS sublayer supports both 64/66B encoding (10GE) and 8B10B encoding (SGMII/1000BASE-X) with an optional FEC layer function for backplane (10G-KR) application. This Quad-Mode Core is configurable through software register.

The east-bound interface from the MAC provides a configurable 64-bit system interface.

The bound interface performs the mapping of transmit and receive data streams (at the PMA layer) to the on-chip SERDES.

Figure 1  25G/10G/2.5G/1.25G Quad-Mode Code Block Diagram


  • Proven IP reduces development time and risk
  • Support 10GGBASE-R/KR/XFI and 1000BASE-KX PMD interfaces
  • Support 25G/10G/SGMII/1000BASE-X PCS encoding
  • Support for a single-lane SERDES interface
  • MAC rate at 25G/10G/2.5G/1G
  • Optional FC FEC (RS 2112,2080) – IEEE 802.3 Clause 74  support in 10GBASE-KR mode
  • Off-the-shelf, proven technology implementation in FPGAs and ASIC SOC
  • Tested and interoperability-proven against Spirent and Viavi test equipment


  • Integrated MAC and PCS for area efficiency
  • Fully compatible with IEEE802.3 2015 standard and SGMII specification 1.6 Standard
  • Super low latency with minimized fixed and variable delay for network efficiency.
  • Supports 1588v2 1-step and 2-step time stamps and full error handling
  • Supports 802.1Qbb priority flow control (PFC)


  • High performance server network interface cards
  • Mid-sized routers