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ADSP-21569 Recommended for New Designs
Reaching speeds of up to 1 GHz, the ADSP-2156x processors are members of the SHARC® family of products. The ADSP-2156x processor is based on the SHARC...
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ADSP-21569 on Analog.com

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Inconsistencies between 21569-SOM schematic and DSP datasheet



		

			

									
					    Hfuhrhurr
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 24, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADSP-21569  
    
    		        		    		    	
			
    Hi there,
    

    we found an inconsistency between the pin assignment in the schematic of the ev-21569-som-schematic.pdf and the datasheet of the 21569 processor.
    

    See below.
    

      
    

    I assume, GND is used as negative reference voltage for the housekeeping ADC.
    

    If this is something that anyone at ADI has to worry about, please do so.
    

    If not this can probably be ignored as "not good style".
    

    Best regards,
    

    Rainer
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 ADSP-21569
                
                                                    
                 Audio Signal Processors
                
                                                    
                 Datasheet/Specs
                
                                                    
                 SHARC Audio Processors/SoCs
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi Rainer,
      

      Regarding "I assume, GND is used as negative reference voltage for the housekeeping ADC."
      >> Yes, your understanding seems correct. The housekeeping ADC uses GND as its negative reference voltage. Please refer the below image.
      

       
      


      Regarding "we found an inconsistency between the pin assignment in the schematic of the ev-21569-som-schematic.pdf and the datasheet of the 21569 processor."
      >> Thank you for pointing this. We will check and update as soon as possible.
      

      Regards,
      Ranjitha. R
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
												
						in reply to Ranji
					
									
      
	
      

		
		
      
					
      Hi Rainer,
      


      We will update the documentation in the future release.
      

      Meanwhile, you can follow the EV-21569-SOM schematic as a reference.
      

      Regards,
      Nandini C
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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