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ADSP-BF704 Production
This device is a member of the ADSP-BF70x Blackfin Digital Signal Processor (DSP) product family. The new Blackfin+ processor core combines dual-MAC 16...
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ADSP-BF704 on Analog.com

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How to check the processor version at runtime?

		
	
				

			

									
					    J_Merlin
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Nov 13, 2025 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user asked if it's possible to determine the exact Blackfin processor (e.g., ADSP-BF700 vs. ADSP-BF704) and its capabilities at runtime. The final answer indicates that the TAPC_IDCODE register only differentiates silicon revisions, not specific chip derivatives. To identify the processor, check the physical label or use compile-time macros and factory-programmed identifiers.
                        	    

                
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Category: Hardware

    		        		            		    
Product Number:  ADSP-BF704  

    		        		    		    

		    		    
		    			

			    
For Blackfin+ is there a way to determine during runtime the processor in use?


E.g. BF700 and BF704 differ in L2 memsize and max. clock speed. I could not find if that information could be derived from the chip by software. Is there some information coded into the serial number or alike?


Case


 https://ez.analog.com/dsp/blackfin-processors/f/q-a/55688/how-to-check-the-processor-version-at-runtime 


already showed how to get the silicon revision, but that does not help in determining the exact chip derivative and its capabilites.



			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Nov 14, 2025 6:11 AM
            
            
						
			            		
    
		
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    Hi,
    

    You can use TAPC_IDCODE register to differentiate only the silicon revision within the same processor line. You cannot distinguish between the ADSP-BF700 and ADSP-BF704 either by reading these registers or by the voltage levels.
    

    You can check the part number from the silicon's physical label. To check via software, use compile-time macros or read factory-programmed identifiers.
    

    Regards,
    Nandini C
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Nov 14, 2025 6:11 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    Hi,
    

    You can use TAPC_IDCODE register to differentiate only the silicon revision within the same processor line. You cannot distinguish between the ADSP-BF700 and ADSP-BF704 either by reading these registers or by the voltage levels.
    

    You can check the part number from the silicon's physical label. To check via software, use compile-time macros or read factory-programmed identifiers.
    

    Regards,
    Nandini C
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

    • 





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