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ADAU1461 Obsolete
The ADAU1461 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 35 mW from...
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ADAU1461 on Analog.com

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ADAU1461 TDM problem

		
	
				

			

									
					    Brettcoupe
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 21, 2013 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hi. I have a custom prototype PCB with ADAU1461. Running in slave 8ch TDM
    
 
    However I cannout get an output on the TDM SDO pin. Its always HIGH for bits 32-8 and LOW for 7-0 in the TDM slot.
    
 
    See attached  DSP.JPG
    
 
    my MCLK is 12.288mhz So I am using the PLL x4.
    
 
    My Project even has a Fixed DC signal on one of the TDM slots  to see if the Problem is receiving or sending. and yet still no output.
    
 
    Project attached.
    
 
    Also attached is a DUMP of the Config registers unless I am missing something and surely I must be, They look ok to me.
    
 
    I could really do with some help on this. I have run out of Ideas.
    
 
    Thanks
    
 
    Brett
    
			
    
			
									
		                             
                        

    
    
                                            
                 ADAU1461
                
                                                    
                 Audio Signal Processors
                
                                                    
                 SigmaDSP Audio Processors
                
                                
            
    
    
    
		
    

				
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                on Oct 27, 2013 1:42 PM
            
            
						
			            		
        
		
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        Hi Guys
        
 
        I still cannot get any output on the TDM.
        
 
        I readback all the Config Program Data registers and they are all correct.
        
 
        I readback all the Param Ram registers 32. bytes. These are Not the same as what is Loaded at default. why is this? Do these change once DSP is running.As I am not making any changes.
        
 
        I created a new project with nothing on the schematic page but 8 TDM in direct to 8 TDM out.
        
 
        The same result?
        
 
        help please.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Oct 27, 2013 1:42 PM
            
            
						
			            		
          
		
										0
					
	
          

		
		
          
		
          
                                
                                                            
          
					
          Hi Guys
          
 
          I still cannot get any output on the TDM.
          
 
          I readback all the Config Program Data registers and they are all correct.
          
 
          I readback all the Param Ram registers 32. bytes. These are Not the same as what is Loaded at default. why is this? Do these change once DSP is running.As I am not making any changes.
          
 
          I created a new project with nothing on the schematic page but 8 TDM in direct to 8 TDM out.
          
 
          The same result?
          
 
          help please.
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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