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Two ADAR1000 chips detection with one SDP Board



		

			

									
						Jami
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 19, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi team 
    

    we are trying to access two adar1000 chips using sdp board. But we are able to access only one chip.
    

    Please go through the schematic and suggest us to access both chips .
    

    Same SPI instance is used for both the ADARs but with the different address and Chip select pins.
    

    For ADAR1: Address = 00, using CS1(SPI_SEL_A)
    

          ADAR2: Address = 01, using CS3(SPI_SEL_B)
    

     
    

     
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

					
    
			
    


    

	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •    
      
            
			                            
                        
                on Jan 19, 2022 3:59 PM
            
            
					
      
	
      

		
		
      
					
      Which chip are you successfully writing and reading to/from? 
      

      Have you confirmed that the SPI_SEL_B line is functional with your software? 
      

      For ADAR1: the SPI 16 bit address header (when doing a register write) should be 0x0XXX
      

      For ADAR2: the SPI 16 bit address header (when doing a register write) should be 0x2XXX
      

      Where "XXX" is any valid register address. 
      

      Please see the "Chip Addressing" section and Table 11 in the Rev. A datasheet for more information.
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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