SerialLite II IP Core User Guide

Download PDF
ID 683179
Date 7/13/2021
Public
Document Table of Contents
Document Table of Contents x
1. SerialLite II IP Core Overview 2. SerialLite II IP Core Getting Started 3. SerialLite II IP Core Functional Description 4. SerialLite II IP Core Testbench 5. SerialLite II IP Core User Guide Archives 6. Document Revision History for the SerialLite II IP Core User Guide
1. SerialLite II IP Core Overview x
1.1. General Description 1.2. Performance and Resource Utilization
2. SerialLite II IP Core Getting Started x
2.1. Parameterize the IP Core 2.2. Set Up Simulation 2.3. Generate Files 2.4. Simulate the Design 2.5. Instantiate the IP Core 2.6. Compile and Program Specify Constraints 2.8. SerialLite II Parameter Settings
2.8. SerialLite II Parameter Settings x
2.8.1. Link Consistency 2.8.2. Data Rate 2.8.3. Reference Clock Frequency 2.8.4. Port Type 2.8.5. Self Synchronized Link Up 2.8.6. Scramble 2.8.7. Broadcast Mode 2.8.8. Lane Polarity and Order Reversal 2.8.9. Data Type 2.8.10. Packet Type 2.8.11. Flow Control Operation 2.8.12. Transmit/Receive FIFO Buffers 2.8.13. Data Integrity Protection: CRC 2.8.14. Transceiver Configuration 2.8.15. Error Handling 2.8.16. Optimizing the Implementation
2.8.10. Packet Type x
2.8.10.1. Retry-on-Error
2.8.11. Flow Control Operation x
2.8.11.1. Selecting the Proper Threshold Value 2.8.11.2. Selecting the Proper Pause Duration 2.8.11.3. Selecting the Proper Refresh Value 2.8.11.4. External Flow Control (When RX FIFO Size is 0)
2.8.14. Transceiver Configuration x
2.8.14.1. Voltage Output Differential (VOD) Control Settings 2.8.14.2. Pre-Emphasis Control Settings 2.8.14.3. Transmitter Buffer Power (VCCH) 2.8.14.4. Transceiver Reconfiguration Block 2.8.14.5. ALTGX Support Signals
2.8.16. Optimizing the Implementation x
2.8.16.1. Improving Performance 2.8.16.2. Minimizing Logic Utilization 2.8.16.3. Minimizing Memory Utilization
3. SerialLite II IP Core Functional Description x
3.1. Atlantic Interface 3.2. High-Speed Serial Interface 3.3. Clocks and Data Rates 3.4. Multiple Core Configuration 3.5. IP Core Configuration for Intel® Arria® 10, Arria® V, Cyclone® V, and Stratix® V Devices 3.6. SerialLite II Signals 3.7. IP Core Verification
3.3. Clocks and Data Rates x
3.3.1. Aggregate Bandwidth 3.3.2. External Clock Modes 3.3.3. Internal Clocking Configurations 3.3.4. SerialLite II Deskew Support 3.3.5. SerialLite II Clocking Structure 3.3.6. SerialLite II Pin-Out Diagrams 3.3.7. Initialization and Restart
3.5. IP Core Configuration for Intel® Arria® 10, Arria® V, Cyclone® V, and Stratix® V Devices x
3.5.1. Design Consideration 3.5.2. Parameter Settings For SerialLite II and Custom PHY IP Cores 3.5.3. Extra Signals Between SerialLite II and Custom PHY IP Cores
4. SerialLite II IP Core Testbench x
4.1. Testbench Files 4.2. Testbench Specifications 4.3. Simulation Flow 4.4. Testbench Components
4.3. Simulation Flow x
4.3.1. Running a Simulation 4.3.2. Simulation Pass and Fail Conditions
4.3.2. Simulation Pass and Fail Conditions x
4.3.2.1. Value Change Dump (VCD) File Generation (For the Verilog HDL Testbench) 4.3.2.2. Testbench Time-Out 4.3.2.3. Special Simulation Configuration Settings 4.3.2.4. Atlantic Receiver Behavior
4.4. Testbench Components x
AGEN AMON 4.4.3. Status Monitors 4.4.4. Clock and Reset Generator 4.4.5. Custom PHY IP Core 4.4.6. Example Testbench – Verilog HDL
1. SerialLite II IP Core Overview
2. SerialLite II IP Core Getting Started
3. SerialLite II IP Core Functional Description
4. SerialLite II IP Core Testbench
5. SerialLite II IP Core User Guide Archives
6. Document Revision History for the SerialLite II IP Core User Guide

2.8.13. Data Integrity Protection: CRC

If you need error protection, you may add CRC checking to your packet.

The CRC is automatically generated in transmission and is automatically checked on reception. On the data port, a CRC check failure results in the packet being marked as bad using the rxrdp_err/rxhpp_err signal on the Atlantic interface. You decide independently for each port whether CRC usage is enabled.

The SerialLite II IP core supports both 16-bit and 32-bit CRC algorithms. You decide which CRC algorithm to use independently for each port.
  • The 16-bit algorithm generates a two-byte result, and uses the following polynomial equation:
    G(x) = X16 + X12 + X5 + 1
  • The 32-bit algorithm generates a four-byte result, and uses the following polynomial equation:
    G(x) = X32 + X26 + X23 + X22 + X16 + X12 + X11 + X10 + X8 + X7 + X5 + X4 + X2 + X + 1

The 16-bit version provides excellent protection for packets smaller than about 1 KBytes. For larger packets, CRC-32 can be considered, but it requires significantly more logic, especially in implementations requiring many lanes. At 16 lanes, CRC-32 logic may constitute as much as half of the logic of the entire SerialLite II instantiation. Therefore, CRC-32 should only be used when absolutely necessary.

Level Two Title