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ADV7480 Production
The ADV7480 is a combined HDMI®/MHL® receiver targeted at connectivity enabled head units requiring a wired, uncompressed digital audio/video link from...
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ADV7480 on Analog.com

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[ADV7480] About ADI Recommended Script Commands



		

			

									
					    HTCV3
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 9, 2023 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Datasheet/Specs
    
    		        		        		    		    	
			
    Hi,
    

    

    I am using the ADI recommended script file (01_21) of "ADV7481ES3C-VER.3.6c.txt".
    I have two questions about the contents of the document "ADV7481_UG-747.pdf", which is not explained with "  -  ".
    

    Q1:
    I am sending the (hdmi_register_02h) ”68 83 00” command in the initialization sequence.
    If the "68 83 00" command is not sent (initial value 0xFF), what is the impact?
    

    Q2:
    I am sending the (mute_ctrl) ”68 1A 80” command in the initialization sequence.
    If this bit7 is set to zero, what is the impact?
    

    Best Regards.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      •  Super User  
      
            
			                            
                        
                on May 9, 2023 6:48 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      Please find the below comments,
      

      Q1.
      

      "68 83 00" register manually controls the RX termination then the RX will not work properly.
      

      Please note that, If those writes are not included, Part would not expect to work reliably .
      

      Those registers are generally internal settings that let us handle process variation which is why they are determined during characterization. The settings that show up as "ADI Recommeded Settings" are the values that work reliably across voltage and temperature. They really should be called "ADI Required settings".
      

      Q2.
      

      If bit 7 is set to zero, then it will mute the compressed audio stream other than LPCM.
      

      Also Please refer the below snap details about 68 1A register. 
      

       
      

      

      

      Thanks,
      

      Poornima
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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