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QSGMII/SGMII/1000BASE-X and MAC

Overview

The fully integrated 5G QSGMII, 2.5G/1.25G SGMII and 1000BASE-X Physical Coding Sublayer (PCS-X) and Media Access Controller (MAC) core for Ethernet applications is compliant with IEEE 802.3 standard and QSGMII and SGMII specifications. The interface to the PMA supports a single channel Tri mode bi-directional, serial interface. The PCS sublayer supports 8B10B encoding (QSGMII/SGMII/1000BASE-X). This Tri-Mode Core is configurable through software register.

The West-bound interface from the MAC provides a configurable 32-bit system interface.

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

Key Features

  • Integrated MAC and PCS for area efficiency
  • Fully compatible with IEEE802.3 2015 standard, QSGMII specification 1.2, 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)
  • QSGMII Specific Features
    • TX Core
      • K28.1 swapper
      • IDLE /I1/ generation control
      • Multiplexing of 4 MAC channels
      • Disparity calculation across all 4 channels
    • RX Core
      • K28.1 de-swapper
      • Detection of IDLE /I1/ only in synchronization
      • De-multiplexing of 4 MAC channels
      • Disparity check
      • Performance Monitoring and Statistics
        • PCS Status – link up/down
        • disparity error count
      • SGMII/SGMII/1000BASE-R PCS Core Features
        • PCS-X TX Core
          • PCS-X encoding of incoming MII signal
          • 8B10B encoding
          • Disparity calculation
          • Auto negotiation TX – enable/restart
        • PCS-X RX Core
          • 8B10B decoding
          • Disparity check
          • Auto negotiation RX – sync
          • PCS-X decoding and synchronization
          • Carrier Extend/Error detection and interrupt reporting
          • Performance Monitoring and Statistics
            • PCS Status – link up/down
            • disparity error count
          • GMAC Core Features
            • TX MAC
              • TX FCS insertion – programmable control
              • TX Preamable insertion – programmable control
              • TX testpattern generation
              • TX MAC control frame generation
                • Unicast/Multicast PAUSE frame generation by MAC client or by software
                • Software configurable PAUSE quanta
              • TX Performance Monitoring and Statistics (counters are 32-bit with read-to-clear)
                • Byte count
                • Frame count
                • Local PAUSE frame count
                • Total PAUSE frame count
                • Broadcast frame count
                • Multicast frame count
                • Unicast frame count
                • Bad FCS frame count
                • Undersize frame count
                • Oversize frame count
                • Fragmented frame count
                • Jabber frame count
                • Frame count statistic for the following sized frames:
                  • 64 byte
                  • 65-127
                  • 128-255
                  • 256-511
                  • 512-1023
                  • 1024-1518
                  • 1519-2047
                  • >= 2048
                • RX MAC
                  • RX BER monitor
                  • RX FCS check and removal
                  • RX Preamble removal
                  • RX PAUSE frame processing and handling
                  • RX Performance Monitoring and Statistics (counters are 32-bit with read-to-clear)
                    • Drop count
                    • Byte count
                    • Frame count
                    • PAUSE frame count
                    • Broadcast frame count
                    • Multicast frame count
                    • Unicast frame count
                    • Bad FCS frame count
                    • Undersize frame count
                    • Oversize frame count
                    • Fragmented frame count
                    • Jabber frame count
                    • Frame count statistic for the following sized frames:
                      • 64 byte
                      • 65-127
                      • 128-255
                      • 256-511
                      • 512-1023
                      • 1024-1518
                      • 1519-2047
                      • >= 2048
                    • Additional Add-on features
                      • 1588v2 time stamping
                      • 802.1Qbb Priority Flow Control (PFC) up to 8 priorities

Benefits

  • Proven IP reduces development time and risk
  • Support 5Gbps, 2.5Gbps and 1.25Gbps serdes interfaces
  • Support QSGMII, SGMII and 1000BASE-X 8B10B PCS encoding
  • Support 4 or 1 channel operations
  • Off-the-shelf, proven technology implementation in FPGAs and ASIC SOC
  • Tested and interoperability-proven

Block Diagram

QSGMII/SGMII/1000BASE-X and MAC Block Diagram

Applications

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

Technical Specifications

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