2.1. Installation and Licensing for LL 40GbE IP Core for Stratix® V Devices
2.2. Installing and Licensing Intel® FPGA IP Cores
2.3. Specifying the IP Core Parameters and Options
2.4. IP Core Parameters
2.5. Files Generated for Stratix V Variations
2.6. Files Generated for Arria 10 Variations
2.7. Integrating Your IP Core in Your Design
2.8. IP Core Testbenches
2.9. Compiling the Full Design and Programming the FPGA
2.10. Initializing the IP Core
2.7.1. Pin Assignments
2.7.2. External Transceiver Reconfiguration Controller Required in Stratix V Designs
2.7.3. Transceiver PLL Required in Arria 10 Designs
2.7.4. Handling Potential Jitter in Intel® Arria® 10 Devices
2.7.5. External Time-of-Day Module for Variations with 1588 PTP Feature
2.7.6. Clock Requirements for 40GBASE-KR4 Variations
2.7.7. External TX MAC PLL
2.7.8. Placement Settings for the LL 40GbE Core
2.8.2.1. Generating the LL 40GbE Testbench
2.8.2.2. Optimizing the IP Core Simulation With the Testbenches
2.8.2.3. Optimization in the 40GBASE-KR4 Testbench
2.8.2.4. Simulating with the Modelsim Simulator
2.8.2.5. Simulating with the NCSim Simulator
2.8.2.6. Simulating with the VCS Simulator
2.8.2.7. Testbench Output Example
3.2.1. LL 40GbE IP Core TX Datapath
3.2.2. LL 40GbE IP Core TX Data Bus Interfaces
3.2.3. LL 40GbE IP Core RX Datapath
3.2.4. LL 40GbE IP Core RX Data Bus Interfaces
3.2.5. External Reconfiguration Controller
3.2.6. External Transceiver PLL
3.2.7. External TX MAC PLL
3.2.8. Congestion and Flow Control Using Pause Frames
3.2.9. Pause Control and Generation Interface
3.2.10. Pause Control Frame Filtering
3.2.11. Link Fault Signaling Interface
3.2.12. Statistics Counters Interface
3.2.13. 1588 Precision Time Protocol Interfaces
3.2.14. PHY Status Interface
3.2.15. Transceiver PHY Serial Data Interface
3.2.16. Low Latency 40GBASE-KR4 IP Core Variations
3.2.17. Control and Status Interface
3.2.18. Arria 10 Transceiver Reconfiguration Interface
3.2.19. Clocks
3.2.20. Resets
3.2.2.1. LL 40GbE IP Core User Interface Data Bus
3.2.2.2. LL 40GbE IP Core TX Data Bus with Adapters (Avalon-ST Interface)
3.2.2.3. LL 40GbE 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
3.2.3.1. LL 40GbE IP Core RX Filtering
3.2.3.2. LL 40GbE IP Core Preamble Processing
3.2.3.3. IP Core Strict SFD Checking
3.2.3.4. LL 40GbE IP Core FCS (CRC-32) Removal
3.2.3.5. LL 40GbE IP Core CRC Checking
3.2.3.6. LL 40GbE IP Core Malformed Packet Handling
3.2.3.7. RX CRC Forwarding
3.2.3.8. Inter-Packet Gap
3.2.3.9. Pause Ignore
3.2.3.10. Control Frame Identification
3.2.20. Resets
The LL 40GbE IP core has a single asynchronous reset signal. Asserting this signal resets the full IP core. You must hold the reset signal asserted for ten clk_status clock cycles to ensure proper hold time.
You should not release the reset signal until after you observe that the reference clock is stable. If the reference clock is generated from an fPLL, wait until after the fPLL locks. Ten clk_status cycles should be sufficient for the fPLL to lock and the reference clock to stabilize.
Signal Name |
Direction |
Description |
---|---|---|
reset_async | Input |
LL 40GbE IP core asynchronous reset signal |
In addition, the LL 40GbE IP core has one or two of the following synchronous reset signals:
- reset_status—Resets the IP core control and status interface, an Avalon-MM interface. Associated clock is the clk_status clock, which clocks the control and status interface.
- reconfig_reset—Resets the IP core Arria 10 transceiver reconfiguration interface, an Avalon-MM interface. Associated clock is the reconfig_clk, which clocks the Arria 10 transceiver reconfiguration interface. This signal is available only in Arria 10 IP core variations.