Quartus® Prime Pro Edition User Guide: Third-party Synthesis
ID
683122
Date
5/23/2025
Public
1.1. About Precision RTL Synthesis Support
1.2. Precision RTL Integration Flow
1.3. Altera Device Family Support
1.4. Precision RTL Generated Files
1.5. Creating and Compiling a Project in the Precision Synthesis Software
1.6. Mapping the Design with Precision RTL
1.7. Synthesizing the Design and Evaluating the Results
1.8. Guidelines for Altera IP Cores and Architecture-Specific Features
1.9. Siemens EDA Precision* RTL Synthesis Support Revision History
1.8.1. Instantiating IP Cores With IP Catalog-Generated Verilog HDL Files
1.8.2. Instantiating IP Cores With IP Catalog-Generated VHDL Files
1.8.3. Instantiating Intellectual Property With the IP Catalog and Parameter Editor
1.8.4. Instantiating Black Box IP Functions With Generated Verilog HDL Files
1.8.5. Instantiating Black Box IP Functions With Generated VHDL Files
1.8.6. Inferring Altera IP Cores from HDL Code
2.1. About Synplify Support
2.2. Synplify Software Integration Flow
2.3. Hardware Description Language Support
2.4. Altera Device Family Support
2.5. Tool Setup
2.6. Synplify Software Generated Files
2.7. Design Constraints Support
2.8. Simulation and Formal Verification
2.9. Synplify Optimization Strategies
2.10. Guidelines for Altera IP Cores and Architecture-Specific Features
2.11. Synopsys Synplify* Support Revision History
2.12. Quartus Prime Pro Edition User Guide: Third-Party Synthesis Archives
2.10.1.1. Instantiating Altera IP Cores with IP Catalog Generated Verilog HDL Files
2.10.1.2. Instantiating Altera IP Cores with IP Catalog Generated VHDL Files
2.10.1.3. Changing Synplify’s Default Behavior for Instantiated Altera IP Cores
2.10.1.4. Instantiating Intellectual Property with the IP Catalog and Parameter Editor
2.10.1.5. Instantiating Black Box IP Cores with Generated Verilog HDL Files
2.10.1.6. Instantiating Black Box IP Cores with Generated VHDL Files
2.10.1.7. Other Synplify Software Attributes for Creating Black Boxes
2.9.5.2. Maximum Fan-Out
When your design has critical path nets with high fan-out, use the syn_maxfan attribute to control the fan-out of the net. Setting this attribute for a specific net results in the replication of the driver of the net to reduce overall fan‑out. The syn_maxfan attribute takes an integer value and applies it to inputs or registers. The syn_maxfan attribute cannot be used to duplicate control signals. The minimum allowed value of the attribute is 4. Using this attribute might result in increased logic resource utilization, thus straining routing resources, which can lead to long compilation times and difficult fitting.
If you must duplicate an output register or an output enable register, you can create a register for each output pin by using the syn_useioff attribute.