AN 307: Intel® FPGA Design Flow for Xilinx* Users

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Date 2/25/2022
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Document Table of Contents
Document Table of Contents x
1. Introduction to Intel® FPGA Design Flow for Xilinx* Users 2. Technology Comparison 3. FPGA Tools Comparison 4. Xilinx* to Intel® FPGA Design Conversion 5. Conclusion 6. AN 307: Intel® FPGA Design Flow for Xilinx* Users Archives 7. Document Revision History for Intel® FPGA Design Flow for Xilinx* Users
2. Technology Comparison x
2.1. Intel® FPGA and SoC Devices 2.2. Intel® - Xilinx* Device Comparison 2.3. Intel® FPGA Device Features
3. FPGA Tools Comparison x
3.1. Hardware and Software Tools for FPGA Design 3.2. FPGA Design Flow Using Command Line Scripting 3.3. FPGA Design Flow Using Tools with GUIs 3.4. Additional Intel® Quartus® Prime Pro Edition Features
3.2. FPGA Design Flow Using Command Line Scripting x
3.2.1. Command-Line Executable Equivalents 3.2.2. Programming and Configuration File Support in the Intel® Quartus® Prime Pro Edition Software
3.2.1. Command-Line Executable Equivalents x
3.2.1.1. synth_design 3.2.1.2. place_design/route_design 3.2.1.3. report_timing 3.2.1.4. write_bitstream 3.2.1.5. write_sdf/write_verilog/write_vhdl 3.2.1.6. report_power 3.2.1.7. write_checkpoint 3.2.1.8. Run Complete Design Flow
3.3. FPGA Design Flow Using Tools with GUIs x
3.3.1. Project Creation 3.3.2. Design Entry 3.3.3. IP Status 3.3.4. Design Constraints 3.3.5. Synthesis 3.3.6. Design Implementation 3.3.7. Finalize Pinout 3.3.8. Viewing and Editing Design Placement 3.3.9. Static Timing Analysis 3.3.10. Generation of Device Programming Files 3.3.11. Power Analysis 3.3.12. Simulation 3.3.13. Hardware Verification 3.3.14. View Netlist 3.3.15. Design Optimization 3.3.16. Techniques to Improve Productivity 3.3.17. Partial Reconfiguration 3.3.18. Cross-Probing in the Intel® Quartus® Prime Pro Edition Software
3.3.2. Design Entry x
3.3.2.1. HDL Editor 3.3.2.2. Schematic/Block Editor 3.3.2.3. State Machine Editor 3.3.2.4. IP Catalog and Parameter Editor 3.3.2.5. Platform Designer System Integration Tool 3.3.2.6. Platform Designer Component Editor
3.3.4. Design Constraints x
3.3.4.1. Assignment Editor 3.3.4.2. Create Timing Constraints with the Timing Analyzer GUI 3.3.4.3. Create Timing Constraints with the Timing Analyzer Text Editor
3.3.7. Finalize Pinout x
3.3.7.1. Pin Planner 3.3.7.2. Interface Planner 3.3.7.3. Tile Interface Planner
3.3.12. Simulation x
3.3.12.1. Simulation Models for Designs Containing LPMs or IP Cores
3.3.13. Hardware Verification x
3.3.13.1. System Console 3.3.13.2. Signal Tap Logic Analyzer 3.3.13.3. In-System Sources and Probes 3.3.13.4. Toolkit Explorer 3.3.13.5. Remote Debugging 3.3.13.6. Other Intel® FPGA Debugging Tools
3.3.13.4. Toolkit Explorer x
3.3.13.4.1. Transceiver Toolkit 3.3.13.4.2. EMIF Debug Toolkit
3.3.14. View Netlist x
3.3.14.1. RTL Viewer 3.3.14.2. Technology Map Viewer
3.3.15. Design Optimization x
3.3.15.1. Hyper-Aware Design Flow 3.3.15.2. Physical Synthesis Optimization 3.3.15.3. Optimization Modes 3.3.15.4. Fractal Synthesis
3.3.16. Techniques to Improve Productivity x
3.3.16.1. Fast Preservation 3.3.16.2. Engineering Change Order (ECO) Flow 3.3.16.3. Block-Based Design Flow 3.3.16.4. Design Assistant 3.3.16.5. Snapshot Viewer 3.3.16.6. Design Space Explorer II
3.4. Additional Intel® Quartus® Prime Pro Edition Features x
3.4.1. Scripting with Tcl in the Intel® Quartus® Prime Pro Edition Software
3.4.1. Scripting with Tcl in the Intel® Quartus® Prime Pro Edition Software x
3.4.1.1. Running Scripts from the DOS or UNIX Prompt 3.4.1.2. Running Scripts in Batch Mode from a Shell 3.4.1.3. Running Tcl Commands Directly from the Command Line 3.4.1.4. Running Tcl Commands Interactively from the Shell 3.4.1.5. The Intel® Quartus® Prime Tcl Console Window
4. Xilinx* to Intel® FPGA Design Conversion x
4.1. Replacing Xilinx* Primitives 4.2. Converting IP Cores 4.3. Setting Equivalent Xilinx* Design Constraints 4.4. Setting Up the Simulation Environment
4.1. Replacing Xilinx* Primitives x
4.1.1. Converting I/O Buffers 4.1.2. Changing Default I/O Standard for Pins 4.1.3. Converting Registers
4.1.1. Converting I/O Buffers x
4.1.1.1. Example of Converting I/O Buffer
4.2. Converting IP Cores x
4.2.1. Converting Memory Blocks 4.2.2. Converting Mixed-Mode Clock Manager (MMCM) to Phase-Locked Loop (PLL) 4.2.3. Converting Multipliers
4.2.1. Converting Memory Blocks x
4.2.1.1. Embedded Memory Blocks 4.2.1.2. Differences Between Xilinx* Memory and Intel® FPGA Memory 4.2.1.3. Determining Memory Block and Mapping Ports 4.2.1.4. Memory Port Mapping 4.2.1.5. Example: Converting Simple Dual-Port RAM
4.2.1.2. Differences Between Xilinx* Memory and Intel® FPGA Memory x
4.2.1.2.1. Memory Mode 4.2.1.2.2. Clocking Mode 4.2.1.2.3. Write and Read Operation Triggering 4.2.1.2.4. Read-During-Write Operation at the Same Address 4.2.1.2.5. Error Correction Code (ECC) 4.2.1.2.6. Byte Enable 4.2.1.2.7. Address Clock Enable 4.2.1.2.8. Parity Bit Support 4.2.1.2.9. Memory Initialization 4.2.1.2.10. Output Synchronous Set/Reset
4.2.2. Converting Mixed-Mode Clock Manager (MMCM) to Phase-Locked Loop (PLL) x
4.2.2.1. Feature Comparison 4.2.2.2. Port Mapping Reference 4.2.2.3. Example: Converting Xilinx* MMCM into an Intel® PLL
4.2.3. Converting Multipliers x
4.2.3.1. Feature Comparison 4.2.3.2. Port Mapping 4.2.3.3. Example: Converting to the LPM_MULT IP Core 4.2.3.4. Example: Converting to the Intel® FPGA Multiply Adder IP core
4.3. Setting Equivalent Xilinx* Design Constraints x
4.3.1. Device Constraints 4.3.2. Placement Constraints 4.3.3. Timing Constraints 4.3.4. Retimer Constraints
4.3.1. Device Constraints x
4.3.1.1. DRIVE 4.3.1.2. SLEW 4.3.1.3. IOB 4.3.1.4. IOSTANDARD 4.3.1.5. KEEP
4.3.2. Placement Constraints x
4.3.2.1. PBLOCK 4.3.2.2. PACKAGE_PIN 4.3.2.3. LOC & BEL 4.3.2.4. PROHIBIT
4.3.2.1. PBLOCK x
4.3.2.1.1. Differences Between PBLOCK and Logic Lock Regions
4.3.3. Timing Constraints x
4.3.3.1. Clock Domain Crossing
4.4. Setting Up the Simulation Environment x
4.4.1. Simulation Levels 4.4.2. HDL Support for EDA Simulators 4.4.3. Value Change Dump (VCD) Support 4.4.4. Simulating Intel FPGA IP Cores
1. Introduction to Intel® FPGA Design Flow for Xilinx* Users
2. Technology Comparison
3. FPGA Tools Comparison
4. Xilinx* to Intel® FPGA Design Conversion
5. Conclusion
6. AN 307: Intel® FPGA Design Flow for Xilinx* Users Archives
7. Document Revision History for Intel® FPGA Design Flow for Xilinx* Users

4.2.1.2.4. Read-During-Write Operation at the Same Address

There are two types of read-during-write operations: same-port operations and mixed-port operations.

Figure 12. Read-During-Write Data Flow
The same-port read-during-write mode applies to either:
  • a single-port RAM
  • the same port of a true-dual port RAM
  • the same port a of simple quad-port RAM
Mixed-port read-during-write mode applies to a RAM in:
  • simple-dual port
  • true-dual port
  • simple-quad port mode
that has one port reading and the other port writing to the same address location with the same clock.

Intel® FPGA RAM and Xilinx* RAM support both read-during-write port modes. However, they have different output options. These options vary depending on the operation mode and type of embedded memory block or device that you select.

Intel® FPGA RAMs support configurations with output options of NEW_DATA (flow-through), OLD_DATA, DONT_CARE, or NEW_A_OLD_B. Xilinx* RAMs support configurations with output options READ_FIRST, WRITE_FIRST, or NO_CHANGE.

Table 44.  Output Options in Xilinx* RAM and Intel® FPGA RAM for Read-During-Write Operation
Description Output after Read-During-Write operation Types of RAM Output
Xilinx* Intel® FPGA
Output reflects the new data at that address. New data WRITE_FIRST NEW_DATA
Outputs reflect the old data at that address before the new data is written into memory. Old data READ_FIRST OLD_DATA
Outputs reflect the previous read data and remains unaffected by the write operation. Unaffected NO_CHANGE Not supported15
Read-during-write writes new data into memory, and the output displays unknown values. Unknown Not supported DONT_CARE 16
For simple quad port, the read-during-write operation behaves differently for each port:
  • In port A, the operation writes new data into memory and displays new data at output
  • In port B, the operation writes new data but displays old data.
Port A: New data

Port B: Old data

Not supported NEW_A_OLD_B

In Intel® FPGA RAMs, the output choices depend on the operation mode and the type of embedded memory block. For information about output choices for same-port and mixed-port read-during-write modes, refer to the Embedded Memory Blocks chapter in the corresponding device handbook.

15 To implement NO_CHANGE behavior, you must add additional logic. Use the write_enable signal and compare the write and read addresses to track the operation.
16 You can choose DONT_CARE for a read-during-write operation if the output is not crucial to your design.
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