System Specification
                            
                            
                        
                            
                                Device Selection
                            
                            
                        
                            
                                Early System and Board Planning
                            
                            
                        
                            
                                Pin Connection Considerations for Board Design
                            
                            
                        
                            
                                I/O and Clock Planning
                            
                            
                        
                            
                                Design Entry
                            
                            
                        
                            
                                Design Implementation, Analysis, Optimization, and Verification
                            
                            
                        
                            
                            
                                Design Checklist
                            
                        
                            
                                Appendix: Cyclone® 10 GX Transceiver Design Guidelines
                            
                            
                        
                            
                            
                                Conclusion
                            
                        
                            
                            
                                Document Revision History
                            
                        
                    
                Speed Grade
The device speed grade affects the device timing performance and timing closure, as well as power utilization. There are two speed grades available: 5 (fastest) and 6. One way to determine which speed grade your design requires is to consider the supported clock rates for specific I/O interfaces.
You can use the fastest speed grade during prototyping to reduce compilation time (because less time is spent optimizing the design to meet timing requirements), and then move to a slower speed grade for production to reduce cost if the design meets its timing requirements.