Quartus® Prime Pro Edition User Guide: Design Recommendations
ID
683082
Date
4/14/2025
Public
1.1. Using Provided HDL Templates
1.2. Instantiating IP Cores in HDL
1.3. Inferring Multipliers and DSP Functions
1.4. Inferring Memory Functions from HDL Code
1.5. Register and Latch Coding Guidelines
1.6. General Coding Guidelines
1.7. Designing with Low-Level Primitives
1.8. Cross-Module Referencing (XMR) in HDL Code
1.9. Using force Statements in HDL Code
1.10. Recommended HDL Coding Styles Revision History
1.4.1.1. Use Synchronous Memory Blocks
1.4.1.2. Avoid Unsupported Reset and Control Conditions
1.4.1.3. Check Read-During-Write Behavior
1.4.1.4. Controlling RAM Inference and Implementation
1.4.1.5. Single-Clock Synchronous RAM with Old Data Read-During-Write Behavior
1.4.1.6. Single-Clock Synchronous RAM with New Data Read-During-Write Behavior
1.4.1.7. Simple Dual-Port, Dual-Clock Synchronous RAM
1.4.1.8. True Dual-Port Synchronous RAM
1.4.1.9. Mixed-Width Dual-Port RAM
1.4.1.10. Inferring RAM with Byte-Enable Signals
1.4.1.11. Inferring Simple Quad-Port RAM
1.4.1.12. Specifying Initial Memory Contents at Power-Up
1.6.6.1. If Performance is Important, Optimize for Speed
1.6.6.2. Use Separate CRC Blocks Instead of Cascaded Stages
1.6.6.3. Use Separate CRC Blocks Instead of Allowing Blocks to Merge
1.6.6.4. Take Advantage of Latency if Available
1.6.6.5. Save Power by Disabling CRC Blocks When Not in Use
1.6.6.6. Initialize the Device with the Synchronous Load (sload) Signal
3.4.1. Apply Complete System-Centric Timing Constraints for the Timing Analyzer
3.4.2. Force the Identification of Synchronization Registers
3.4.3. Set the Synchronizer Data Toggle Rate
3.4.4. Optimize Metastability During Fitting
3.4.5. Increase the Length of Synchronizers to Protect and Optimize
3.4.6. Increase the Number of Stages Used in Synchronizers
3.4.7. Select a Faster Speed Grade Device
2.1. Following Synchronous FPGA Design Practices
The first step in good design methodology is to understand the implications of your design practices and techniques. This section outlines the benefits of optimal synchronous design practices and the hazards involved in other approaches.
Good synchronous design practices can help you meet your design goals consistently. Problems with other design techniques can include reliance on propagation delays in a device, which can lead to race conditions, incomplete timing analysis, and possible glitches.
In a synchronous design, a clock signal triggers every event. If you ensure that all the timing requirements of the registers are met, a synchronous design behaves in a predictable and reliable manner for all process, voltage, and temperature (PVT) conditions. You can easily migrate synchronous designs to different device families or speed grades.