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ADV7180 Not Recommended for New Designs
The ADV7180 automatically detects and converts standard analog baseband television signals compatible with worldwide NTSC, PAL, and SECAM standards into...
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ADV7180 on Analog.com

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ADV7180



		

			

									
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				                on Jul 21, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi, we are using ADV7180.
    It seems that ADV7180 has some gain.
    Please let me know the reason why ADV7180 has any gain, if the following contents of the resisters are incorrect.
    My understanding is that we usually use ADV7180 with no gain.
    
 
    We are setting the resisters as follows,
    
 
    0x00  0x00 
    0x04  0x57 
    0x17  0x41 
    0x31  0x02 
    0x3D  0xA2 
    0x3E  0x6A 
    0x3F  0xA0 
    0x55  0x81 
    0x0E  0x00 
    
 
    Then let me know any other reasons you can hit on.
    
 
    We are waiting for your response.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Jul 27, 2014 4:12 PM
            
            
					
        
	
        

		
		
        
					
        Hi, GuenterL . Thank you for your quick response.
        After my review of the setting of resisters, this problem heve been clear.
        Then, another questions happen.
        I have find the following Table in the datasheet of ADV7180.
        
 
        -------------------------------------------------------
        
 
        Table61. RANGE Function 
        Range                Description 
        0                   16≦Y≦235,16≦C/P≦240 
        1(default)        1≦Y≦254,1≦C/P≦254
        
 
        -------------------------------------------------------
        
 
        My questions.
        Q1.
        Does ADV7391 also have the same functions ?
        
 
        Q2.
        In the case of using ADV 7391 and ADV7180 together,like "ADV7180BCPZ -> FPGA -> ADV7391BCPZ".
        If ADV7391 do not have these functions, should I adjust Y and C/P of ADV7180 ?
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Jul 27, 2014 4:12 PM
            
            
					
          
	
          

		
		
          
					
          Hi, GuenterL . Thank you for your quick response.
          After my review of the setting of resisters, this problem heve been clear.
          Then, another questions happen.
          I have find the following Table in the datasheet of ADV7180.
          
 
          -------------------------------------------------------
          
 
          Table61. RANGE Function 
          Range                Description 
          0                   16≦Y≦235,16≦C/P≦240 
          1(default)        1≦Y≦254,1≦C/P≦254
          
 
          -------------------------------------------------------
          
 
          My questions.
          Q1.
          Does ADV7391 also have the same functions ?
          
 
          Q2.
          In the case of using ADV 7391 and ADV7180 together,like "ADV7180BCPZ -> FPGA -> ADV7391BCPZ".
          If ADV7391 do not have these functions, should I adjust Y and C/P of ADV7180 ?
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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