2.3. Functional Description
   The SDI II  Intel® FPGA IP core design example supports the following simplex and duplex transceiver modes: 
   
 
  - Parallel loopback with simplex mode
- Parallel loopback with duplex mode
- Serial loopback with simplex mode
- Serial loopback with duplex mode
   Figure 14. Parallel Loopback with Simplex Mode IP Core (Enable active video data protocols = None)
    
     
  
 
  
   Note: Refer to Clocking Scheme for the Reference and System PLL Clocks IP connections. 
  
 
  
   Figure 15. Parallel Loopback with Simplex Mode IP Core (Enable active video data protocols = AXIS-VVP Full)
    
     
  
 
  
    Figure 16. Parallel Loopback with Duplex Mode IP Core (Enable active video data protocols = None)
     
      
   
 
   
    Note: Refer to Clocking Scheme for the Reference and System PLL Clocks IP connections. 
   
 
  
   Figure 17. Parallel Loopback with Duplex Mode IP Core (Enable active video data protocols = AXIS-VVP Full)
    
     
  
 
  
    Figure 18. Serial Loopback with Simplex Mode IP Core (Enable active video data protocols = None)
     
      
   
 
  
   Note: 
   
 
  - Refer to Clocking Scheme for the Reference and System PLL Clocks IP connections.
- Serial loopback design is not supported when you select AXIS-VVP Full active video data protocol.
    Figure 19. Serial Loopback with Duplex Mode IP Core (Enable active video data protocols = None)