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Reading the AD5696R



		

			

									
					    Kevin_at_Vubiq
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 7, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am investigating a problem we are having with reading from the AD5696R. When following the "read operation" procedure, the value returned is nearly always 0x91. I attached a Corelis BusPro-I I2C monitor to the EVAL-AD5696RSDZ and performed a read, and noticed that it did not seem to be following the procedure. When reading from DAC C, the command following the first address byte was 14, not 04 as I understood from the datasheet. Can you explain why I am seeing a different read operation than is described in the datasheet? 
    
 
    
 
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Mar 9, 2018 4:49 AM
            
            
					
        
	
        

		
		
        
					
        Because I observed a problem in my application, I attached a Corelis to a EVAL-AD5696RSDZ in order to observe its operation and see how my attempted reads differ from EVAL-AD5696RSDZ successful reads. So far, I am able to write but unable to read with the Corelis. Also, I have observed that EVAL-AD5696RSDZ reads use a "write" command(0x1) while reading even though the datasheet specifies "NOP" (0x0).
        
 
         
        
 
        I hope to learn how to control the AD5696R on my EVAL-AD5696RSDZ using my Corelis. If this succeeds, I will attempt to control the AD5696R in my application the same way. So, the problem in front of me right now is my AD5696R with date code #713.
        
 
        
 
        above, the Corelis monitoring the EVAL-AD5696RSDZ read of DAC B. Below, the Corelis tries reading DAC B.
        
 
        
 
         
        
 
         
        
 
         
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Mar 9, 2018 4:49 AM
            
            
					
          
	
          

		
		
          
					
          Because I observed a problem in my application, I attached a Corelis to a EVAL-AD5696RSDZ in order to observe its operation and see how my attempted reads differ from EVAL-AD5696RSDZ successful reads. So far, I am able to write but unable to read with the Corelis. Also, I have observed that EVAL-AD5696RSDZ reads use a "write" command(0x1) while reading even though the datasheet specifies "NOP" (0x0).
          
 
           
          
 
          I hope to learn how to control the AD5696R on my EVAL-AD5696RSDZ using my Corelis. If this succeeds, I will attempt to control the AD5696R in my application the same way. So, the problem in front of me right now is my AD5696R with date code #713.
          
 
          
 
          above, the Corelis monitoring the EVAL-AD5696RSDZ read of DAC B. Below, the Corelis tries reading DAC B.
          
 
          
 
           
          
 
           
          
 
           
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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