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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. 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. RAM with Byte-Enable Signals
1.4.1.11. 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
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2.5.2. Running Design Assistant During Compilation
When enabled, Design Assistant runs automatically during compilation and reports design rule violations in the Compilation Report.
When you enable or specify parameters for a rule check in compilation mode, those specifications apply by default to running Design Assistant in compilation mode. If you change the rule settings for analysis mode, those settings are independent from the rule settings in compilation mode.
- To run Design Assistant checking during compilation flows, ensure that Enable Design Assistant execution during compilation is on.
- To enable or disable specific design rule checks, turn on or off the checkbox for that rule in the Name column. If the rule is unchecked, Design Assistant does not report violations for the rule.
- In the Parameters field, consider changing default values for rules you enable.
Figure 24. Design Assistant Rule Settings
- To run Design Assistant during compilation, run one or more stages of the Compiler from the Processing menu or Compilation Dashboard.
Figure 25. Example Design Assistant Results in Compilation Reports
- To view the results for each rule, click the rule in the Rules list. A description of the rule and design recommendations for correction appear.
Figure 26. Design Assistant Rule Violation Recommendation