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AD2435W Recommended for New Designs
The Automotive Audio Bus (A2B®) provides a multichannel, I2S/TDM link over distances of up to 15 m between nodes. It embeds bidirectional synchronous pulse...
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AD2435W on Analog.com

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hotplug issue

		
	
				

			

									
					    wuxiangzhi
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 25, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  AD2435W  
    
    		        		        		        
    Software Version: NA
    
    		    		    
    
		    		    
		    			
    
			    
    Hello Support Team Guys,
    

    There are two sub nodes in one of our customers A2B network.
    

    When plugging and unplugging the first one node, an I2C communication failure occasionally occurs. Through the log, it is found that register 0x17 has an SRFCRCERR error. What could be causing this, and do you have any good suggestions to help resolve this issue? The attachment is the log file.
    

     AD2435 A2B hotplug issue log.txt
    
			
    
			
									
		                             
                        

    
    
                                            
                 na
                
                                                    
                 Audio Products
                
                                                    
                 software
                
                                                    
                 AD2435W
                
                                                    
                 Automotive Audio Bus (A<sup>2</sup>B®)
                
                                        
                                            
                
                
                                        
                                            
                
                
                                
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jul 16, 2025 10:39 AM
            
            
						
			            		
      
		
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      Hi  
      

      In an ideal scenario, nodes should not be removed, as hot plugging is not supported.
      

      If a node is removed, you may encounter SRFMISSERR or other bit-level faults, depending on how the INTMSKx registers are configured.
      

      If you suspect a node drop, you can confirm it by reading a known subnode register, such as the Vendor ID. If the node no longer exists, the read operation may result an error.
      

      In such cases, you may need to initiate a discovery or partial discovery process, as described in the Technical Reference Manual.
      

      Let us know if you have more questions.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jul 16, 2025 10:39 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi  
      

      In an ideal scenario, nodes should not be removed, as hot plugging is not supported.
      

      If a node is removed, you may encounter SRFMISSERR or other bit-level faults, depending on how the INTMSKx registers are configured.
      

      If you suspect a node drop, you can confirm it by reading a known subnode register, such as the Vendor ID. If the node no longer exists, the read operation may result an error.
      

      In such cases, you may need to initiate a discovery or partial discovery process, as described in the Technical Reference Manual.
      

      Let us know if you have more questions.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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