40- and 100-Gbps Ethernet MAC and PHY MegaCore Function User Guide

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ID 683114
Date 6/15/2022
Public
Document Table of Contents
Document Table of Contents x
Product Discontinuance Notification 1. About the 40- and 100-Gbps Ethernet MAC and PHY IP Core 2. Getting Started 3. Functional Description 4. Debugging the 40GbE and 100GbE Link A. 40-100GbE IP Core Example Design B. Address Map Changes for the 40-100GbE IP Core v12.0 Release C. 10GBASE-KR Registers D. Additional Information
1. About the 40- and 100-Gbps Ethernet MAC and PHY IP Core x
1.1. 40- and 100-Gbps Ethernet MAC and PHY IP Core Supported Features 1.2. 40-100GbE IP Core Device Family and Speed Grade Support 1.3. IP Core Verification 1.4. Performance and Resource Utilization 1.5. Release Information
1.2. 40-100GbE IP Core Device Family and Speed Grade Support x
1.2.1. Device Family Support 1.2.2. 40-100GbE IP Core Device Speed Grade Support
1.3. IP Core Verification x
1.3.1. Simulation Environment 1.3.2. Hardware Testing
1.4. Performance and Resource Utilization x
1.4.1. Resource Utilization for 40GbE IP Cores 1.4.2. Resource Utilization for 100GbE IP Cores
1.4.2. Resource Utilization for 100GbE IP Cores x
1.4.2.1. Resource Utilization for 100GbE CAUI–4 IP Cores
2. Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. Specifying the 40-100GbE IP Core Parameters and Options 2.3. IP Core Parameters 2.4. Files Generated for the 40-100GbE IP Core 2.5. Simulating the IP Core 2.6. Integrating Your IP Core in Your Design 2.7. 40-100GbE IP Core Testbenches 2.8. Simulating the 40‑100GbE IP Core With the Testbenches 2.9. Compiling the Full Design and Programming the FPGA 2.10. Initializing the IP Core
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode
2.6. Integrating Your IP Core in Your Design x
2.6.1. Pin Assignments 2.6.2. External Transceiver Reconfiguration Controller Required in Stratix V Designs 2.6.3. Placement Settings for the 40-100GbE IP Core
2.7. 40-100GbE IP Core Testbenches x
2.7.1. Testbenches with Adapters 2.7.2. Testbenches without Adapters 2.7.3. Understanding the Testbench Behavior
2.8. Simulating the 40‑100GbE IP Core With the Testbenches x
2.8.1. Generating the Testbench 2.8.2. Simulating with the Modelsim Simulator 2.8.3. Simulating with the NCSim Simulator 2.8.4. Simulating with the VCS Simulator 2.8.5. Testbench Output Example: 40GbE IP Core with Adapters 2.8.6. Testbench Output Example: 100GbE IP Core with Adapters
3. Functional Description x
3.1. High Level System Overview 3.2. 40-100GbE MAC and PHY Functional Description 3.3. Signals 3.4. Software Interface: Registers 3.5. Ethernet Glossary
3.2. 40-100GbE MAC and PHY Functional Description x
3.2.1. IP Core TX Datapath 3.2.2. IP Core TX Data Bus Interfaces 3.2.3. 40-100GbE IP Core RX Datapath 3.2.4. IP Core RX Data Bus Interfaces 3.2.5. 40GbE Lower Rate 24.24 Gbps MAC and PHY 3.2.6. 100GbE CAUI–4 PHY 3.2.7. External Reconfiguration Controller 3.2.8. Congestion and Flow Control Using Pause Frames 3.2.9. Pause Control and Generation Interface 3.2.10. Pause Control Frame and Non‑Pause Control Frame Filtering and Forwarding 3.2.11. 40-100GbE IP Core Modes of Operation 3.2.12. Link Fault Signaling Interface 3.2.13. Statistics Counters Interface 3.2.14. MAC – PHY XLGMII or CGMII Interface 3.2.15. Lane to Lane Deskew Interface 3.2.16. PCS Test Pattern Generation and Test Pattern Check 3.2.17. Transceiver PHY Serial Data Interface 3.2.18. 40GBASE-KR4 IP Core Variations 3.2.19. Control and Status Interface 3.2.20. Clocks 3.2.21. Resets
3.2.1. IP Core TX Datapath x
3.2.1.1. Preamble, Start, and SFD Insertion 3.2.1.2. Address Insertion 3.2.1.3. Length/Type Field Processing 3.2.1.4. Frame Padding 3.2.1.5. Frame Check Sequence (CRC-32) Insertion 3.2.1.6. Inter‑Packet Gap Generation and Insertion
3.2.2. IP Core TX Data Bus Interfaces x
3.2.2.1. 40-100GbE IP Core User Interface Data Bus 3.2.2.2. 40-100GbE IP Core TX Data Bus with Adapters (Avalon-ST Interface) 3.2.2.3. 40-100GbE IP Core TX Data Bus Without Adapters (Custom Streaming Interface) 3.2.2.4. Bus Quantization Effects With Adapters 3.2.2.5. User Interface to Ethernet Transmission
3.2.2.5. User Interface to Ethernet Transmission x
3.2.2.5.1. 40GbE IP Core Without Adapters 3.2.2.5.2. 100GbE IP Core Without Adapters 3.2.2.5.3. Order of Transmission
3.2.3. 40-100GbE IP Core RX Datapath x
3.2.3.1. 40-100GbE IP Core RX Filtering 3.2.3.2. 40-100GbE IP Core Preamble Processing 3.2.3.3. 40-100GbE IP Core FCS (CRC-32) Removal 3.2.3.4. 40-100GbE IP Core CRC Checking 3.2.3.5. RX CRC Forwarding 3.2.3.6. RX Automatic Pad Removal Control 3.2.3.7. Address Checking 3.2.3.8. Inter-Packet Gap 3.2.3.9. Pause Ignore
3.2.4. IP Core RX Data Bus Interfaces x
3.2.4.1. 40-100GbE IP Core User Interface Data Bus 3.2.4.2. 40-100GbE IP Core RX Data Bus with Adapters (Avalon-ST Interface) 3.2.4.3. 40-100GbE IP Core RX Data Bus Without Adapters (Custom Streaming Interface) 3.2.4.4. 100GbE IP Core RX Client Interface Examples 3.2.4.5. Error Conditions on the RX Datapath
3.2.8. Congestion and Flow Control Using Pause Frames x
3.2.8.1. Conditions Triggering XOFF Frame Transmission 3.2.8.2. Conditions Triggering XON Frame Transmission 3.2.8.3. Pause Transmission Logic
3.2.14. MAC – PHY XLGMII or CGMII Interface x
3.2.14.1. MAC to PHY Connection Interface
3.2.17. Transceiver PHY Serial Data Interface x
3.2.17.1. PCS BER Monitor
3.2.18. 40GBASE-KR4 IP Core Variations x
3.2.18.1. 40GBASE-KR4 Reconfiguration Interface 3.2.18.2. 40GBASE-KR4 Microprocessor Interface
3.3. Signals x
3.3.1. Signals of MAC and PHY Variations Without Adapters 3.3.2. Signals of MAC and PHY Variations With Adapters 3.3.3. Signals of 40-100GbE MAC‑Only IP Core Variations 3.3.4. Signals of 40-100GbE PHY‑Only IP Core Variations
3.4. Software Interface: Registers x
3.4.1. IP Core Registers 3.4.2. 40‑100GbE Example Design Registers
3.4.1. IP Core Registers x
3.4.1.1. Transceiver PHY Control and Status Registers 3.4.1.2. Lock Status Registers 3.4.1.3. Bit Error Flag Registers 3.4.1.4. PCS Hardware Error Register 3.4.1.5. BER Monitor Register 3.4.1.6. Test Mode Register 3.4.1.7. Test Pattern Counter Register 3.4.1.8. Link Fault Signaling Registers 3.4.1.9. MAC and PHY Reset Registers 3.4.1.10. PCS‑VLANE Registers 3.4.1.11. PRBS Registers 3.4.1.12. 40GBASE-KR4 Registers 3.4.1.13. MAC Configuration and Filter Registers 3.4.1.14. Pause Registers 3.4.1.15. MAC Hardware Error Register 3.4.1.16. CRC Configuration Register 3.4.1.17. MAC Feature Configuration Registers 3.4.1.18. MAC Address Registers 3.4.1.19. Statistics Registers
3.4.2. 40‑100GbE Example Design Registers x
3.4.2.1. PMD Registers 3.4.2.2. MDIO Registers 3.4.2.3. 2‑Wire Serial Interface Registers
C. 10GBASE-KR Registers x
C.1. 10GBASE-KR PHY Register Definitions
D. Additional Information x
D.1. 40- and 100-Gbps Ethernet MAC and PHY MegaCore Function User Guide Revision History D.2. How to Contact Altera D.3. Typographic Conventions
Product Discontinuance Notification
1. About the 40- and 100-Gbps Ethernet MAC and PHY IP Core
2. Getting Started
3. Functional Description
4. Debugging the 40GbE and 100GbE Link
A. 40-100GbE IP Core Example Design
B. Address Map Changes for the 40-100GbE IP Core v12.0 Release
C. 10GBASE-KR Registers
D. Additional Information

3.2.1.5. Frame Check Sequence (CRC-32) Insertion

The TX MAC computes and inserts a CRC32 checksum in the transmitted MAC frame. The frame check sequence (FCS) field contains a 32-bit CRC value. The MAC computes the CRC32 over the frame bytes that include the source address, destination address, length, data, and pad (if applicable). The CRC checksum computation excludes the preamble, SFD, and FCS. The encoding is defined by the following generating polynomial: 

FCS(X) = X32 +X26 +X23 +X22 +X16 +X12 +X11 +X10 +X8 +X7 +X5 +X4 +X2 +X1 +1

CRC bits are transmitted with MSB (X32) first.

Independent user configuration register bits control FCS CRC insertion at runtime. Bit [0] of the CRC_CONFIG register enables and disables CRC insertion. By default, the CRC insertion feature is enabled.

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