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
                            
                        
                    
                Clock Control Block
Every GCLK and RCLK network has its own clock control block. The control block provides the following features:
- Clock source selection (with dynamic selection for GCLKs)
 - GCLK multiplexing
 - Clock power down (with static or dynamic clock enable or disable)
 
Use these features to select different clock input signals or power-down clock networks to reduce power consumption without using any combinational logic in your design. In Cyclone® 10 GX devices, the clock enable signals are supported at the clock network level instead of at the PLL output counter level, so you can turn off a clock even when a PLL is not being used.
| Number | Done? | Checklist Item | 
|---|---|---|
| 1 | Use the clock control block for clock selection and power-down. | 
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