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ADV7280A Recommended for New Designs
The ADV7280A has the same pinout as and is software compati-ble with the ADV7280. The mobile industry processor interface (MIPI®) model of the ADV7280A...
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ADV7280A on Analog.com

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ADV728A-M MIPI compliance test fail by first payload bit and fall time items



		

			

									
					    RayW0705
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 22, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  ADV7280A  
    
    		        		    		    	
			
    Hi ADI Expert,
    

    We have tested the ADV7280A-M for MIPI D-PHY V2.1 compliance test, but test report failed 2 items. 
    

    One is 1.3.12 HS Data TX 80%- 20% fall time and others is 1.5.3 HS clock Rising Edge Alignment to First Payload Bit.
    

      
    

    

     
    

     
    

    

    Then I checked the reference manual, MIPI CSI Map register Address 0x01 to 0x05 as TLPX/THSPREP/THSZEROS/THSTRAIL/THSEXIT registers. 
    

    It seems that adjust the MIPI timing, but not clear information.  Can you give me some advice on this matter? Thanks.
    

    

    
									
			        
		
    

				
						
        

    
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      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Nov 23, 2024 1:20 AM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      Kindly note that, ADV728A-M MIPI CSI-2 transmitter conforms to the "MIPI D-PHY Version 1.00.00 specification". It therefore conforms to the timing specifications in the MIPI D-PHY Version 1.00.00 specification.
      

       To guarantee optimal operation, the MIPI CSI-2 receiver should also conform to the 'MIPI D-PHY Version 1.00.00 specification'.
      

      As per MIPI specification the MIPI receiver need to terminate the signals correctly. If the Micro processor/ FPGA does not control the termination correctly then the MIPI signals from the ADV7280-M cannot be decoded.
      

      For our evaluation of the ADV7280-M we used the MIPI reference termination board available from here:
      www.iol.unh.edu/.../mipi
      

      

      Thanks,
      

      Poornima
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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