External Memory Interfaces Intel® Agilex™ FPGA IP User Guide

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Date 3/28/2022
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Document Table of Contents
Document Table of Contents x
1. About the External Memory Interfaces Intel® Agilex™ FPGA IP 2. Intel® Agilex™ FPGA EMIF IP – Introduction 3. Intel® Agilex™ FPGA EMIF IP – Product Architecture 4. Intel® Agilex™ FPGA EMIF IP – End-User Signals 5. Intel® Agilex™ FPGA EMIF IP – Simulating Memory IP 6. Intel® Agilex™ FPGA EMIF IP – DDR4 Support 7. Intel® Agilex™ FPGA EMIF IP – QDR-IV Support 8. Intel® Agilex™ FPGA EMIF IP – Timing Closure 9. Intel® Agilex™ FPGA EMIF IP – I/O Timing Closure 10. Intel® Agilex™ FPGA EMIF IP – Controller Optimization 11. Intel® Agilex™ FPGA EMIF IP – Debugging 12. External Memory Interfaces Intel® Agilex™ FPGA IP User Guide Archives 13. Document Revision History for External Memory Interfaces Intel® Agilex™ FPGA IP User Guide
1. About the External Memory Interfaces Intel® Agilex™ FPGA IP x
1.1. Release Information
2. Intel® Agilex™ FPGA EMIF IP – Introduction x
2.1. Intel® Agilex™ EMIF IP Protocol and Feature Support 2.2. Intel® Agilex™ EMIF IP Design Flow 2.3. Intel® Agilex™ EMIF IP Design Checklist
3. Intel® Agilex™ FPGA EMIF IP – Product Architecture x
3.1. Intel® Agilex™ EMIF Architecture: Introduction 3.2. Intel® Agilex™ EMIF Sequencer 3.3. Intel® Agilex™ EMIF Calibration 3.4. Intel® Agilex™ EMIF Controller 3.5. User-requested Reset in Intel® Agilex™ EMIF IP 3.6. Intel® Agilex™ EMIF for Hard Processor Subsystem 3.7. Using a Custom Controller with the Hard PHY
3.1. Intel® Agilex™ EMIF Architecture: Introduction x
3.1.1. Intel® Agilex™ EMIF Architecture: I/O Subsystem 3.1.2. Intel® Agilex™ EMIF Architecture: I/O SSM 3.1.3. Intel® Agilex™ EMIF Architecture: I/O Bank 3.1.4. Intel® Agilex™ EMIF Architecture: I/O Lane 3.1.5. Intel® Agilex™ EMIF Architecture: Input DQS Clock Tree 3.1.6. Intel® Agilex™ EMIF Architecture: PHY Clock Tree 3.1.7. Intel® Agilex™ EMIF Architecture: PLL Reference Clock Networks 3.1.8. Intel® Agilex™ EMIF Architecture: Clock Phase Alignment
3.1.4. Intel® Agilex™ EMIF Architecture: I/O Lane x
3.1.4.1. Considerations for Designing DDR4 x72 Interface Together with an AVST x8/x16/x32 Configuration Scheme
3.3. Intel® Agilex™ EMIF Calibration x
3.3.1. Intel® Agilex™ Calibration Stages 3.3.2. Intel® Agilex™ Calibration Stages Descriptions 3.3.3. Intel® Agilex™ Calibration Flowchart 3.3.4. Intel® Agilex™ Calibration Algorithms
3.3.4. Intel® Agilex™ Calibration Algorithms x
3.3.4.1. Calibration Algorithms for DDR4 3.3.4.2. Calibration Algorithms for QDR-IV 3.3.4.3. Guidelines for Debugging Calibration Issues
3.3.4.1. Calibration Algorithms for DDR4 x
3.3.4.1.1. DDR4 Read Calibration 3.3.4.1.2. DDR4 Write Calibration
3.3.4.2. Calibration Algorithms for QDR-IV x
3.3.4.2.1. QDR-IV Read Calibration 3.3.4.2.2. QDR-IV Write Calibration
3.3.4.3. Guidelines for Debugging Calibration Issues x
3.3.4.3.1. Debugging Calibration Failure Using Information from the Calibration report 3.3.4.3.2. Debugging Address and Command Leveling Calibration Failure 3.3.4.3.3. Debugging Address and Command Deskew Failure 3.3.4.3.4. Debugging DQS Enable Failure 3.3.4.3.5. Debugging Read Deskew Calibration Failure 3.3.4.3.6. Debugging VREFIN Calibration Failure 3.3.4.3.7. Debugging LFIFO Calibration Failure 3.3.4.3.8. Debugging Write Leveling Failure 3.3.4.3.9. Debugging Write Deskew Calibration Failure 3.3.4.3.10. Debugging VREFOUT Calibration Failure
3.4. Intel® Agilex™ EMIF Controller x
3.4.1. Hard Memory Controller 3.4.2. Intel® Agilex™ Hard Memory Controller Rate Conversion Feature
3.4.1. Hard Memory Controller x
3.4.1.1. Hard Memory Controller Features 3.4.1.2. Hard Memory Controller Main Control Path 3.4.1.3. Data Buffer Controller
3.6. Intel® Agilex™ EMIF for Hard Processor Subsystem x
3.6.1. Restrictions on I/O Bank Usage for Intel® Agilex™ EMIF IP with HPS
4. Intel® Agilex™ FPGA EMIF IP – End-User Signals x
4.1. Intel® Agilex™ EMIF IP Interface and Signal Descriptions 4.2. Intel® Agilex™ EMIF IP AFI Signals 4.3. Intel® Agilex™ EMIF IP AFI 4.0 Timing Diagrams 4.4. Intel® Agilex™ EMIF IP Memory Mapped Register (MMR) Tables
4.1. Intel® Agilex™ EMIF IP Interface and Signal Descriptions x
4.1.1. Intel Agilex EMIF IP Interfaces for DDR4 4.1.2. Intel Agilex EMIF IP Interfaces for QDR-IV
4.1.1. Intel Agilex EMIF IP Interfaces for DDR4 x
4.1.1.1. local_reset_req for DDR4 4.1.1.2. local_reset_status for DDR4 4.1.1.3. pll_ref_clk for DDR4 4.1.1.4. pll_locked for DDR4 4.1.1.5. ac_parity_err for DDR4 4.1.1.6. oct for DDR4 4.1.1.7. mem for DDR4 4.1.1.8. status for DDR4 4.1.1.9. afi_reset_n for DDR4 4.1.1.10. afi_clk for DDR4 4.1.1.11. afi_half_clk for DDR4 4.1.1.12. afi for DDR4 4.1.1.13. emif_usr_reset_n for DDR4 4.1.1.14. emif_usr_clk for DDR4 4.1.1.15. ctrl_amm for DDR4 4.1.1.16. ctrl_amm_aux for DDR4 4.1.1.17. ctrl_auto_precharge for DDR4 4.1.1.18. ctrl_user_priority for DDR4 4.1.1.19. ctrl_ecc_user_interrupt for DDR4 4.1.1.20. ctrl_ecc_readdataerror for DDR4 4.1.1.21. ctrl_ecc_status for DDR4 4.1.1.22. ctrl_mmr_slave for DDR4 4.1.1.23. hps_emif for DDR4 4.1.1.24. emif_calbus for DDR4 4.1.1.25. emif_calbus_clk for DDR4
4.1.2. Intel Agilex EMIF IP Interfaces for QDR-IV x
4.1.2.1. local_reset_req for QDR-IV 4.1.2.2. local_reset_status for QDR-IV 4.1.2.3. pll_ref_clk for QDR-IV 4.1.2.4. pll_locked for QDR-IV 4.1.2.5. oct for QDR-IV 4.1.2.6. mem for QDR-IV 4.1.2.7. status for QDR-IV 4.1.2.8. afi_reset_n for QDR-IV 4.1.2.9. afi_clk for QDR-IV 4.1.2.10. afi_half_clk for QDR-IV 4.1.2.11. afi for QDR-IV 4.1.2.12. emif_usr_reset_n for QDR-IV 4.1.2.13. emif_usr_clk for QDR-IV 4.1.2.14. ctrl_amm for QDR-IV 4.1.2.15. emif_calbus for QDR-IV 4.1.2.16. emif_calbus_clk for QDR-IV
4.2. Intel® Agilex™ EMIF IP AFI Signals x
4.2.1. AFI Clock and Reset Signals 4.2.2. AFI Address and Command Signals 4.2.3. AFI Write Data Signals 4.2.4. AFI Read Data Signals 4.2.5. AFI Calibration Status Signals 4.2.6. AFI Tracking Management Signals 4.2.7. AFI Shadow Register Management Signals
4.3. Intel® Agilex™ EMIF IP AFI 4.0 Timing Diagrams x
4.3.1. AFI Address and Command Timing Diagrams 4.3.2. AFI Write Sequence Timing Diagrams 4.3.3. AFI Read Sequence Timing Diagrams 4.3.4. AFI Calibration Status Timing Diagram
4.4. Intel® Agilex™ EMIF IP Memory Mapped Register (MMR) Tables x
4.4.1. ctrlcfg0 4.4.2. ctrlcfg1 4.4.3. dramtiming0 4.4.4. sbcfg1 4.4.5. caltiming0 4.4.6. caltiming1 4.4.7. caltiming2 4.4.8. caltiming3 4.4.9. caltiming4 4.4.10. caltiming9 4.4.11. dramaddrw 4.4.12. sideband0 4.4.13. sideband1 4.4.14. sideband4 4.4.15. sideband6 4.4.16. sideband7 4.4.17. sideband9 4.4.18. sideband11 4.4.19. sideband12 4.4.20. sideband13 4.4.21. sideband14 4.4.22. dramsts 4.4.23. niosreserve0 4.4.24. niosreserve1 4.4.25. sideband16 4.4.26. ecc3: ECC Error and Interrupt Configuration 4.4.27. ecc4: Status and Error Information 4.4.28. ecc5: Address of Most Recent SBE/DBE 4.4.29. ecc6: Address of Most Recent Correction Command Dropped 4.4.30. ecc7: Extension for Address of Most Recent SBE/DBE 4.4.31. ecc8: Extension for Address of Most Recent Correction Command Dropped
5. Intel® Agilex™ FPGA EMIF IP – Simulating Memory IP x
5.1. Simulation Options 5.2. Simulation Walkthrough
5.2. Simulation Walkthrough x
5.2.1. Calibration Modes 5.2.2. Simulation Scripts 5.2.3. Functional Simulation with Verilog HDL 5.2.4. Functional Simulation with VHDL 5.2.5. Simulating the Design Example
6. Intel® Agilex™ FPGA EMIF IP – DDR4 Support x
6.1. Intel® Agilex™ FPGA EMIF IP Parameter Descriptions 6.2. Intel® Agilex™ External Memory Interfaces Intel® Calibration IP Parameters 6.3. Register Map IP-XACT Support for Intel® Agilex™ EMIF DDR4 IP 6.4. Intel® Agilex™ FPGA EMIF IP Pin and Resource Planning 6.5. DDR4 Board Design Guidelines
6.1. Intel® Agilex™ FPGA EMIF IP Parameter Descriptions x
6.1.1. Intel Agilex EMIF IP DDR4 Parameters: General 6.1.2. Intel Agilex EMIF IP DDR4 Parameters: Memory 6.1.3. Intel Agilex EMIF IP DDR4 Parameters: Mem I/O 6.1.4. Intel Agilex EMIF IP DDR4 Parameters: FPGA I/O 6.1.5. Intel Agilex EMIF IP DDR4 Parameters: Mem Timing 6.1.6. Intel Agilex EMIF IP DDR4 Parameters: Controller 6.1.7. Intel Agilex EMIF IP DDR4 Parameters: Diagnostics 6.1.8. Intel Agilex EMIF IP DDR4 Parameters: Example Designs
6.4. Intel® Agilex™ FPGA EMIF IP Pin and Resource Planning x
6.4.1. Intel® Agilex™ FPGA EMIF IP Interface Pins 6.4.2. Intel® Agilex™ FPGA EMIF IP Resources 6.4.3. Pin Guidelines for Intel® Agilex™ FPGA EMIF IP
6.4.1. Intel® Agilex™ FPGA EMIF IP Interface Pins x
6.4.1.1. Estimating Pin Requirements 6.4.1.2. DIMM Options 6.4.1.3. Maximum Number of Interfaces
6.4.2. Intel® Agilex™ FPGA EMIF IP Resources x
6.4.2.1. OCT 6.4.2.2. PLL
6.4.3. Pin Guidelines for Intel® Agilex™ FPGA EMIF IP x
6.4.3.1. Intel® Agilex™ FPGA EMIF IP Banks 6.4.3.2. General Guidelines 6.4.3.3. x4 DIMM Implementation 6.4.3.4. Specific Pin Connection Requirements 6.4.3.5. Command and Address Signals 6.4.3.6. Clock Signals 6.4.3.7. Data, Data Strobes, DM/DBI, and Optional ECC Signals
6.5. DDR4 Board Design Guidelines x
6.5.1. Terminations for DDR4 with Intel® Agilex™ Devices 6.5.2. Clamshell Topology 6.5.3. General Layout Routing Guidelines 6.5.4. Reference Stackup 6.5.5. Intel® Agilex™ EMIF-Specific Routing Guidelines for Various DDR4 Topologies 6.5.6. DDR4 Routing Guidelines: Discrete (Component) Topologies 6.5.7. Intel® Agilex™ EMIF Pin Swapping Guidelines
6.5.1. Terminations for DDR4 with Intel® Agilex™ Devices x
6.5.1.1. Dynamic On-Chip Termination (OCT) 6.5.1.2. Dynamic On-Die Termination (ODT) in DDR4 6.5.1.3. Choosing Terminations on Intel® Agilex™ FPGA Devices 6.5.1.4. On-Chip Termination Recommendations for Intel® Agilex™ FPGA Devices
6.5.5. Intel® Agilex™ EMIF-Specific Routing Guidelines for Various DDR4 Topologies x
6.5.5.1. One DIMM per Channel (1DPC) for UDIMM, RDIMM, LRDIMM, and SODIMM DDR4 Topologies 6.5.5.2. Two DIMMs per Channel (2DPC) for UDIMM, RDIMM, and LRDIMM DDR4 Topologies 6.5.5.3. Two DIMMs per Channel (2DPC) for SODIMM Topology 6.5.5.4. Skew Matching Guidelines for DIMM Configurations 6.5.5.5. Power Delivery Recommendations for the Memory / DIMM Side
6.5.6. DDR4 Routing Guidelines: Discrete (Component) Topologies x
6.5.6.1. Single Rank x 8 Discrete (Component) Topology 6.5.6.2. Single Rank x 16 Discrete (Component) Topology 6.5.6.3. ADDR/CMD Reference Voltage/RESET Signal Routing Guidelines for Single Rank x 8 and R Rank x 16 Discrete (Component) Topologies 6.5.6.4. Skew Matching Guidelines for DDR4 Discrete Configurations 6.5.6.5. Power Delivery Recommendations for DDR4 Discrete Configurations
7. Intel® Agilex™ FPGA EMIF IP – QDR-IV Support x
7.1. Intel® Agilex™ FPGA EMIF IP Parameter Descriptions 7.2. Intel® Agilex™ External Memory Interfaces Intel® Calibration IP Parameters 7.3. Intel® Agilex™ FPGA EMIF IP Pin and Resource Planning 7.4. QDR-IV Board Design Guidelines
7.1. Intel® Agilex™ FPGA EMIF IP Parameter Descriptions x
7.1.1. Intel Agilex EMIF IP QDR-IV Parameters: General 7.1.2. Intel Agilex EMIF IP QDR-IV Parameters: Memory 7.1.3. Intel Agilex EMIF IP QDR-IV Parameters: FPGA I/O 7.1.4. Intel Agilex EMIF IP QDR-IV Parameters: Mem Timing 7.1.5. Intel Agilex EMIF IP QDR-IV Parameters: Controller 7.1.6. Intel Agilex EMIF IP QDR-IV Parameters: Diagnostics 7.1.7. Intel Agilex EMIF IP QDR-IV Parameters: Example Designs
7.3. Intel® Agilex™ FPGA EMIF IP Pin and Resource Planning x
7.3.1. Intel® Agilex™ FPGA EMIF IP Interface Pins 7.3.2. Intel® Agilex™ FPGA EMIF IP Resources 7.3.3. Pin Guidelines for Intel® Agilex™ FPGA EMIF IP
7.3.1. Intel® Agilex™ FPGA EMIF IP Interface Pins x
7.3.1.1. Estimating Pin Requirements 7.3.1.2. Maximum Number of Interfaces
7.3.2. Intel® Agilex™ FPGA EMIF IP Resources x
7.3.2.1. OCT 7.3.2.2. PLL
7.3.3. Pin Guidelines for Intel® Agilex™ FPGA EMIF IP x
7.3.3.1. Intel® Agilex™ FPGA EMIF IP Banks 7.3.3.2. General Guidelines 7.3.3.3. QDR IV SRAM Commands and Addresses, AP, and AINV Signals 7.3.3.4. QDR IV SRAM Clock Signals 7.3.3.5. QDR IV SRAM Data, DINV, and QVLD Signals 7.3.3.6. Specific Pin Connection Requirements 7.3.3.7. Resource Sharing Guidelines (Multiple Interfaces)
7.4. QDR-IV Board Design Guidelines x
7.4.1. General Layout Routing Guidelines 7.4.2. Reference Stackup 7.4.3. Routing Guidelines for QDR-IV Topology 7.4.4. Intel® Agilex™ EMIF Design Guideline Summary
7.4.3. Routing Guidelines for QDR-IV Topology x
7.4.3.1. QDR-IV Single Device Memory Topology 7.4.3.2. Skew Matching Guidelines for QDR-IV Configurations 7.4.3.3. Power Delivery Recommendation for QDR-IV Configurations
8. Intel® Agilex™ FPGA EMIF IP – Timing Closure x
8.1. Timing Closure 8.2. Optimizing Timing
8.1. Timing Closure x
8.1.1. Timing Analysis
8.1.1. Timing Analysis x
8.1.1.1. PHY or Core
9. Intel® Agilex™ FPGA EMIF IP – I/O Timing Closure x
9.1. I/O Timing Closure Overview 9.2. Collateral Generated with Your EMIF IP 9.3. SPICE Decks 9.4. File Organization 9.5. Top-level Parameterization File 9.6. IP-Supplied Parameters that You Might Need to Override 9.7. Understanding the *_ip_parameters.dat File and Making a Mask Polygon 9.8. Multi-Rank Topology 9.9. Pin Parasitics 9.10. Mask Evaluation
9.3. SPICE Decks x
9.3.1. Address/Command Simulation Deck 9.3.2. FPGA Write Operation Simulation Deck 9.3.3. FPGA Read Operation Simulation Deck
10. Intel® Agilex™ FPGA EMIF IP – Controller Optimization x
10.1. Interface Standard 10.2. Bank Management Efficiency 10.3. Data Transfer 10.4. Improving Controller Efficiency
10.4. Improving Controller Efficiency x
10.4.1. Auto-Precharge Commands 10.4.2. Additive Latency 10.4.3. Bank Interleaving 10.4.4. Additive Latency and Bank Interleaving 10.4.5. User-Controlled Refresh 10.4.6. Frequency of Operation 10.4.7. Series of Reads or Writes 10.4.8. Data Reordering 10.4.9. Starvation Control 10.4.10. Command Reordering 10.4.11. Bandwidth 10.4.12. Enable Command Priority Control 10.4.13. Controller Pre-pay and Post-pay Refresh (DDR4 Only)
10.4.1. Auto-Precharge Commands x
10.4.1.1. Using Auto-precharge to Achieve Highest Memory Bandwidth for DDR4 Interfaces
11. Intel® Agilex™ FPGA EMIF IP – Debugging x
11.1. Interface Configuration Performance Issues 11.2. Functional Issue Evaluation 11.3. Timing Issue Characteristics 11.4. Verifying Memory IP Using the Signal Tap Logic Analyzer 11.5. Hardware Debugging Guidelines 11.6. Categorizing Hardware Issues 11.7. Debugging with the External Memory Interface Debug Toolkit 11.8. Using the Default Traffic Generator 11.9. Using the Configurable Traffic Generator (TG2) 11.10. EMIF On-Chip Debug Port 11.11. Efficiency Monitor
11.1. Interface Configuration Performance Issues x
11.1.1. Interface Configuration Bottleneck and Efficiency Issues
11.2. Functional Issue Evaluation x
11.2.1. Intel® IP Memory Model 11.2.2. Vendor Memory Model 11.2.3. Transcript Window Messages 11.2.4. Modifying the Example Driver to Replicate the Failure
11.3. Timing Issue Characteristics x
11.3.1. Evaluating FPGA Timing Issues 11.3.2. Evaluating External Memory Interface Timing Issues
11.4. Verifying Memory IP Using the Signal Tap Logic Analyzer x
11.4.1. Signals to Monitor with the Signal Tap Logic Analyzer
11.5. Hardware Debugging Guidelines x
11.5.1. Create a Simplified Design that Demonstrates the Same Issue 11.5.2. Measure Power Distribution Network 11.5.3. Measure Signal Integrity and Setup and Hold Margin 11.5.4. Vary Voltage 11.5.5. Operate at a Lower Speed 11.5.6. Determine Whether the Issue Exists in Previous Versions of Software 11.5.7. Determine Whether the Issue Exists in the Current Version of Software 11.5.8. Try A Different PCB 11.5.9. Try Other Configurations 11.5.10. Debugging Checklist
11.6. Categorizing Hardware Issues x
11.6.1. Signal Integrity Issues 11.6.2. Hardware and Calibration Issues
11.6.1. Signal Integrity Issues x
11.6.1.1. Characteristics of Signal Integrity Issues 11.6.1.2. Evaluating Signal Integrity Issues
11.6.1.2. Evaluating Signal Integrity Issues x
11.6.1.2.1. Skew 11.6.1.2.2. Crosstalk 11.6.1.2.3. Power System 11.6.1.2.4. Clock Signals 11.6.1.2.5. Address and Command Signals 11.6.1.2.6. Read Data Valid Window and Eye Diagram 11.6.1.2.7. Write Data Valid Window and Eye Diagram 11.6.1.2.8. OCT and ODT Usage
11.6.2. Hardware and Calibration Issues x
11.6.2.1. Postamble Timing Issues and Margin 11.6.2.2. Intermittent Issue Evaluation 11.6.2.3. Memory Timing Parameter Evaluation 11.6.2.4. Verify that the Board Has the Correct Memory Component or DIMM Installed
11.7. Debugging with the External Memory Interface Debug Toolkit x
11.7.1. Prerequisites for Using the EMIF Debug Toolkit 11.7.2. Configuring a Design to Use the Toolkit 11.7.3. Launching the EMIF Debug Toolkit 11.7.4. Using the EMIF Debug Toolkit 11.7.5. Exporting Tables 11.7.6. Viewing Reports Graphically in the Eye Viewer
11.7.2. Configuring a Design to Use the Toolkit x
11.7.2.1. Generating a Design Example with the Debug Toolkit 11.7.2.2. Creating a Design Example with Multiple External Memory Interfaces 11.7.2.3. Enabling the EMIF Toolkit in an Existing Design
11.7.4. Using the EMIF Debug Toolkit x
11.7.4.1. Memory Configuration Tab 11.7.4.2. Calibration Tab 11.7.4.3. Guidelines for Debugging Calibration Issues 11.7.4.4. Calibration Report Tab 11.7.4.5. Calibrate Termination Tab 11.7.4.6. Vref Margining Tab 11.7.4.7. Driver Margining Tab 11.7.4.8. ISSPs Tab 11.7.4.9. Pin Delay Settings Tab
11.7.4.2. Calibration Tab x
11.7.4.2.1. Rerunning Calibration 11.7.4.2.2. Rerunning the Traffic Generator
11.7.4.3. Guidelines for Debugging Calibration Issues x
11.7.4.3.1. Debugging Calibration Failure Using Information from the Calibration report 11.7.4.3.2. Debugging Address and Command Leveling Calibration Failure 11.7.4.3.3. Debugging Address and Command Deskew Failure 11.7.4.3.4. Debugging DQS Enable Failure 11.7.4.3.5. Debugging Read Deskew Calibration Failure 11.7.4.3.6. Debugging VREFIN Calibration Failure 11.7.4.3.7. Debugging LFIFO Calibration Failure 11.7.4.3.8. Debugging Write Leveling Failure 11.7.4.3.9. Debugging Write Deskew Calibration Failure 11.7.4.3.10. Debugging VREFOUT Calibration Failure
11.8. Using the Default Traffic Generator x
11.8.1. Reading the Default Traffic Generator Status 11.8.2. Running Infinite Traffic using the Default Traffic Generator 11.8.3. Changing the Reset Trigger of the Default Traffic Generator 11.8.4. Observing Generated Traffic with Signal Tap
11.9. Using the Configurable Traffic Generator (TG2) x
11.9.1. Enabling the Traffic Generator in a Design Example 11.9.2. Traffic Generator Block Description 11.9.3. Default Traffic Pattern 11.9.4. Configuration and Status Registers 11.9.5. User Pattern 11.9.6. Traffic Generator Status 11.9.7. Starting Traffic with the Traffic Generator 11.9.8. Traffic Generator Configuration User Interface
11.9.5. User Pattern x
11.9.5.1. Test Duration / Instruction pattern 11.9.5.2. Address Pattern 11.9.5.3. Data Pattern and Byte Enable
11.9.5.2. Address Pattern x
11.9.5.2.1. Address Generator Modes 11.9.5.2.2. Address Generator MSB Indices 11.9.5.2.3. Address Generator Effective Width 11.9.5.2.4. Address Generator Relative Frequencies 11.9.5.2.5. Address Pattern Examples - Basic Mode 11.9.5.2.6. Address Pattern Examples - Advanced Mode
11.9.8. Traffic Generator Configuration User Interface x
11.9.8.1. Connecting the Traffic Generator 11.9.8.2. Configuring the Traffic Generator 11.9.8.3. Traffic Generator Preset Selection 11.9.8.4. Traffic Generator Status Report 11.9.8.5. Examples of Configuring the TG2 Traffic Generator
11.10. EMIF On-Chip Debug Port x
11.10.1. Enabling the On-Chip Debug Port 11.10.2. I/O SSM calbus Bridge Data Structures and Usage 11.10.3. I/O SSM User-RAM Data Structures and Usage 11.10.4. Debug Interface Structure 11.10.5. Example: Reading Calibration Results and Margins with the On-Chip Debug Port
11.10.3. I/O SSM User-RAM Data Structures and Usage x
11.10.3.1. Parameter Tables 11.10.3.2. Parameter Table Enums
11.10.3.1. Parameter Tables x
11.10.3.1.1. Global Parameter Table 11.10.3.1.2. Per-interface Parameter Table Structure 11.10.3.1.3. Parameter Table Arrays
11.10.4. Debug Interface Structure x
11.10.4.1. Debug Data Structures 11.10.4.2. Debug Enums
11.11. Efficiency Monitor x
11.11.1. Enabling the Efficiency Monitor in a Design Example 11.11.2. Efficiency Monitor Block Descriptions 11.11.3. Control and Status Registers 11.11.4. Opening the Efficiency Monitor Toolkit
1. About the External Memory Interfaces Intel® Agilex™ FPGA IP
2. Intel® Agilex™ FPGA EMIF IP – Introduction
3. Intel® Agilex™ FPGA EMIF IP – Product Architecture
4. Intel® Agilex™ FPGA EMIF IP – End-User Signals
5. Intel® Agilex™ FPGA EMIF IP – Simulating Memory IP
6. Intel® Agilex™ FPGA EMIF IP – DDR4 Support
7. Intel® Agilex™ FPGA EMIF IP – QDR-IV Support
8. Intel® Agilex™ FPGA EMIF IP – Timing Closure
9. Intel® Agilex™ FPGA EMIF IP – I/O Timing Closure
10. Intel® Agilex™ FPGA EMIF IP – Controller Optimization
11. Intel® Agilex™ FPGA EMIF IP – Debugging
12. External Memory Interfaces Intel® Agilex™ FPGA IP User Guide Archives
13. Document Revision History for External Memory Interfaces Intel® Agilex™ FPGA IP User Guide

6.1.6. Intel Agilex EMIF IP DDR4 Parameters: Controller

Table 88.  Group: Controller / Low Power Mode
Display Name Description
Enable Auto Power-Down Enable this parameter to have the controller automatically place the memory device into power-down mode after a specified number of idle controller clock cycles. The idle wait time is configurable. All ranks must be idle to enter auto power-down. (Identifier: CTRL_DDR4_AUTO_POWER_DOWN_EN)
Auto Power-Down Cycles Specifies the number of idle controller cycles after which the memory device is placed into power-down mode. You can configure the idle waiting time. The supported range for number of cycles is from 1 to 65534. (Identifier: CTRL_DDR4_AUTO_POWER_DOWN_CYCS)
Table 89.  Group: Controller / Efficiency
Display Name Description
Enable User Refresh Control When enabled, user logic has complete control and is responsible for issuing adequate refresh commands to the memory devices, via the MMR interface. This feature provides increased control over worst-case read latency and enables you to issue refresh bursts during idle periods. (Identifier: CTRL_DDR4_USER_REFRESH_EN)
Enable Auto-Precharge Control Select this parameter to enable the auto-precharge control on the controller top level. If you assert the auto-precharge control signal while requesting a read or write burst, you can specify whether the controller should close (auto-precharge) the currently open page at the end of the read or write burst, potentially making a future access to a different page of the same bank faster. (Identifier: CTRL_DDR4_AUTO_PRECHARGE_EN)
Address Ordering Controls the mapping between Avalon addresses and memory device addresses. By changing the value of this parameter, you can change the mappings between the Avalon-MM address and the DRAM address. (CS = chip select, CID = chip ID in 3DS/TSV devices, BG = bank group address, Bank = bank address, Row = row address, Col = column address) (Identifier: CTRL_DDR4_ADDR_ORDER_ENUM)
Enable Reordering Enable this parameter to allow the controller to perform command and data reordering. Reordering can improve efficiency by reducing bus turnaround time and row/bank switching time. Data reordering allows the single-port memory controller to change the order of read and write commands to achieve highest efficiency. Command reordering allows the controller to issue bank management commands early based on incoming patterns, so that the desired row in memory is already open when the command reaches the memory interface. For more information, refer to the Data Reordering topic in the EMIF Handbook. (Identifier: CTRL_DDR4_REORDER_EN)
Starvation limit for each command Specifies the number of commands that can be served before a waiting command is served. The controller employs a counter to ensure that all requests are served after a pre-defined interval -- this ensures that low priority requests are not ignored, when doing data reordering for efficiency. The valid range for this parameter is from 1 to 63. For more information, refer to the Starvation Control topic in the EMIF Handbook. (Identifier: CTRL_DDR4_STARVE_LIMIT)
Enable Command Priority Control Select this parameter to enable user-requested command priority control on the controller top level. This parameter instructs the controller to treat a read or write request as high-priority. The controller attempts to fill high-priority requests sooner, to reduce latency. Connect this interface to the conduit of your logic block that determines when the external memory interface IP treats the read or write request as a high-priority command. (Identifier: CTRL_DDR4_USER_PRIORITY_EN)
Enable controller major mode Enable read and write commands flow control in command arbiter to reduce turnaround time, thus improving efficiency of random traffic pattern. (Identifier: CRTL_DDR4_MAJOR_MODE_EN)
Enable controller post-pay refresh This feature allows the controller to delay refreshes to give way for mainband activities, or issue multiple refreshes when traffic is idle to improve HMC efficiency. (Identifier: CRTL_DDR4_POST_REFRESH_EN)
Post-pay refresh lower limit A low refresh threshold for controller to stop streaming refreshes to memory devices. (Identifier: CRTL_DDR4_POST_REFRESH_LOWER_LIMIT)
Post-pay refresh upper limit A panic refresh threshold for the controller to start streaming accumulated refreshes to memory devices. (Identifier: CRTL_DDR4_POST_REFRESH_UPPER_LIMIT)
Enable controller pre-pay refresh This feature allows the controller to pull in refreshes to give way for mainband activities, or issue multiple refreshes when traffic is idle to improve HMC efficiency. (Identifier: CRTL_DDR4_PRE_REFRESH_EN)
Refresh pre-pay upper limit A refresh threshold for controller to stop streaming pre-pay refreshes to memory devices. (Identifier: CRTL_DDR4_PRE_REFRESH_UPPER_LIMIT)
Table 90.  Group: Controller / Configuration, Status and Error Handling
Display Name Description
Enable Memory-Mapped Configuration and Status Register (MMR) Interface Enable this parameter to change or read memory timing parameters, memory address size, mode register settings, controller status, and request sideband operations. (Identifier: CTRL_DDR4_MMR_EN)
Enable Error Detection and Correction Logic with ECC Enables error-correction code (ECC) for single-bit error correction and double-bit error detection. ECC is implemented as soft logic. (Identifier: CTRL_DDR4_ECC_EN)
Enable Auto Error Correction to External Memory Specifies that the controller automatically schedule and perform a write back to the external memory when a single-bit error is detected. Regardless of whether the option is enabled or disabled, the ECC feature always corrects single-bit errors before returning the read data to user logic. (Identifier: CTRL_DDR4_ECC_AUTO_CORRECTION_EN)
Enable ctrl_ecc_readdataerror signal to indicate uncorrectable data errors Select this option to enable the ctrl_ecc_readdataerror signal on the controller top level. The signal has the same timing as the read data valid signal of the Controller Avalon Memory-Mapped interface, and is asserted high to indicate that the read data returned by the Controller in the same cycle contains errors uncorrectable by the ECC logic. (Identifier: CTRL_DDR4_ECC_READDATAERROR_EN)
Export error-correction code (ECC) status ports Enable this parameter to export ECC status ports. (Identifier:CRTL_DDR4_ECC_STATUS_EN)
Table 91.  Group: Controller / Data Bus Turnaround Time
Display Name Description
Additional read-to-write turnaround time (same rank) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a read to a write within the same logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_RD_TO_WR_SAME_CHIP_DELTA_CYCS)
Additional write-to-read turnaround time (same rank) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a write to a read within the same logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_WR_TO_RD_SAME_CHIP_DELTA_CYCS)
Additional read-to-read turnaround time (different ranks) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a read of one logical rank to a read of another logical rank. This can resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_RD_TO_RD_DIFF_CHIP_DELTA_CYCS)
Additional read-to-write turnaround time (different ranks) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a read of one logical rank to a write of another logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_RD_TO_WR_DIFF_CHIP_DELTA_CYCS)
Additional write-to-write turnaround time (different ranks) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a write of one logical rank to a write of another logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_WR_TO_WR_DIFF_CHIP_DELTA_CYCS)
Additional write-to-read turnaround time (different ranks) Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a write of one logical rank to a read of another logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR4_WR_TO_RD_DIFF_CHIP_DELTA_CYCS)
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