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ADV7181D Not Recommended for New Designs
The ADV7181D is a high quality, single-chip, multiformat video decoder and graphics digitizer. This multiformat decoder supports the conversion of PAL...
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ADV7181D on Analog.com

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Question about ADV7181D status register

		
	
				

			

									
					    youstu
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 21, 2016 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user encountered issues with the ADV7181D, where only half the input image width was captured, and the auto-detection incorrectly identified an NTSC signal as PAL. The problem was partially resolved by adjusting VS/HS registers (0x31~0x37 and 0xE6), but the status registers still showed incorrect auto-detection and Fsc unlock. The support engineer recommended using the evaluation board and the standard script for auto-detection to further troubleshoot the issue.
                        	    
    
                
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    I want to use ADV7181D to convert CVBS  to YUV.
    
 
    ADV7181D is init with recommend settings from <ADV7181D_ADV7181D@_ADV7341-VER.1.0c.txt>.
    
 
    Then only half width of the input image is captured from the output . And I got 0x49, 0xC0 and 0x2d from status register 1~3.
    
 
    The input signal is recognized as PAL signal, While it is NTSC  actually, and Fsc Lock is 0.
    
 
    I wonder what does Fsc stands for ? And what would cause auto detection failed?
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jun 30, 2016 9:48 AM
            
            
						
			            		
      
		
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      Hi,
      
 
      Were you able to resolve the problem?
      
 
      First of all, we are recommending you to purchase one of our evaluation boards since this would help you to compare the behavior between yours and eval board.
      
 
      Did you follow the standard scripts available in design support files https://ez.analog.com/docs/DOC-2002?
      
 
      Please refer the script AUTODETECT CVBS IN NTSC/PAL/SECAM as starting point for you: Did you use all the recommended writes in your side? 
      
 
      What script did you use it?
      
 
      Best Regards,
      
 
      Jeyasudha.M
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jun 30, 2016 9:48 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi,
      
 
      Were you able to resolve the problem?
      
 
      First of all, we are recommending you to purchase one of our evaluation boards since this would help you to compare the behavior between yours and eval board.
      
 
      Did you follow the standard scripts available in design support files https://ez.analog.com/docs/DOC-2002?
      
 
      Please refer the script AUTODETECT CVBS IN NTSC/PAL/SECAM as starting point for you: Did you use all the recommended writes in your side? 
      
 
      What script did you use it?
      
 
      Best Regards,
      
 
      Jeyasudha.M
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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