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AD9670 Recommended for New Designs
The AD9670 is designed for low cost, low power, small size, and ease of use for medical ultrasound applications. It contains eight channels of a VGA with...
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AD9670 data out stream

		
	
				

			

									
					    PieroS.
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 30, 2016 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Dear All
    
 
    I have a problem to correct configure tha AD9670.
    
 
    If I configure the FCO in "continous mode", the FCO and the DCO signal go out correctly but the data(DOUT) are always zero. Istead if I configure FCO "only during burst" the DCO signal go out but FCO and DOUT are always zero.
    
 
    I think that the AD9670 don't start correctly, but I'm sure that it is'n in stanby or powerdown mode.
    
 
    Any suggestion?
    
			
    
			
									
		                             
                        

    
    
                                            
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                on Aug 31, 2016 7:14 AM
            
            
						
			            		
        
		
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        Hi Ashraf, 
        
 
        Unfortunately I using my custom board connected with a microcontroller by SPI.
        
 
        I'm be able to write and read internal register. I'm sure that because I see correct decimation signal of DCO and FCO (in continous mode).
        
 
        I think the AD9670 isn't in standby or powerdown mode because if I force it in one of this state, no DCO/FCO signal go out.
        
 
        I use the start-up sequence show in table 26 of the datasheet with only the change of "MSB first" for the SPI (with all conseguences for read/write register in  stream mode).
        
 
        I have a 24MHz ADC clock input and a decimator factor of 32 + 2x RF decimator, 16bit data, 8 lanes and TGC run mode.
        
 
        I made a memory dump of the register interested, I missing only the 8x32 FIR Coefficient for the profile 0. I have calculated it with your matlab code found in previous post.
        
 
        MEMORY MAP REGISTER DDC_0:
            --------------------------------------------------------------------
          Address[0x000-0x007]:  0x18   0xA6   0x01   0x00   0x0F   0x3F   0x00   0x00   
          Address[0x008-0x00F]:  0x00   0x01   0x80   0x00   0x00   0x00   0x00   0x18   
          Address[0x010-0x017]:  0x20   0x1E   0x09   0x00   0x01   0x60   0x00   0x00   
          Address[0x018-0x01F]:  0x04   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x020-0x027]:  0x00   0x4E   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x028-0x02F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x80   
            --------------------------------------------------------------------
          Address[0x100-0x107]:  0x00   0x00   0x00   0x00   0x3F   0x00   0x00   0x00   
          Address[0x108-0x10F]:  0x00   0x00   0x00   0x00   0x00   0xFF   0xFF   0x08   
          Address[0x110-0x117]:  0x00   0x00   0x02   0x25   0x00   0x00   0x00   0x00   
          Address[0x118-0x11F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x120-0x127]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x128-0x12F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x130-0x137]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x138-0x13F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x140-0x147]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x148-0x14F]:  0x00   0x01   0x02   0x03   0x00   0x00   0x00   0x00   
          Address[0x150-0x157]:  0x83   0x03   0x0F   0x07   0x0F   0x0F   0x20   0x00   
          Address[0x158-0x15F]:  0x00   0x00   0x3C   0x3D   0x3E   0x3F   0x3C   0x3C   
          Address[0x160-0x167]:  0x3C   0x3C   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x168-0x16F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x170-0x177]:  0x00   0xFF   0xFF   0x00   0x0F   0x00   0x00   0x00   
          Address[0x178-0x17F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x180-0x187]:  0x87   0x00   0x82   0x27   0x00   0x00   0xAE   0x20   
          Address[0x188-0x18F]:  0x01   0x00   0x00   0x27   0x72   0x00   0x00   0x00   
          Address[0x190-0x197]:  0x10   0x00   0x18   0x00   0x1C   0x00   0x18   0x00   
          Address[0x198-0x19F]:  0x50   0x80   0x00   0x50   0x10   0x00   0x10   0x00   
          Address[0x1A0-0x1A7]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
          Address[0x1A8-0x1AF]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            --------------------------------------------------------------------
        
 
        Core[0]: Stream read from address 0xF00 for 32 byte:
          Address[0xF00-0xF07]:  0xFF 0x7F 0x00 0x80 0xFA 0x00 0x20 0x00 
          Address[0xF08-0xF0F]:  0x66 0x02 0x66 0x46 0x53 0x22 0xE6 0x67 
          Address[0xF10-0xF17]:  0x16 0x9B 0x89 0x02 0x59 0x18 0xD7 0x9D 
          Address[0xF18-0xF1F]:  0xC2 0x26 0x26 0x66 0xEA 0x6F 0x6A 0x44 
        
 
        Any suggestion to try?
        
 
        I have also any question:
        
 
        What is the correct time, in the write start-up sequence, for programming the coefficent of the FIR filter?
        
 
        If the external pin of TX_TRIG is tied low, if I set by SPI the bit5 of register 0x10C the trigger even occur?
        
 
        Have you a memory map dump of a correct configuration?
        
 
        Regards
        
 
        Piero
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Aug 31, 2016 7:14 AM
            
            
						
			            		
          
		
										0
					
	
          

		
		
          
		
          
                                
                                                            
          
					
          Hi Ashraf, 
          
 
          Unfortunately I using my custom board connected with a microcontroller by SPI.
          
 
          I'm be able to write and read internal register. I'm sure that because I see correct decimation signal of DCO and FCO (in continous mode).
          
 
          I think the AD9670 isn't in standby or powerdown mode because if I force it in one of this state, no DCO/FCO signal go out.
          
 
          I use the start-up sequence show in table 26 of the datasheet with only the change of "MSB first" for the SPI (with all conseguences for read/write register in  stream mode).
          
 
          I have a 24MHz ADC clock input and a decimator factor of 32 + 2x RF decimator, 16bit data, 8 lanes and TGC run mode.
          
 
          I made a memory dump of the register interested, I missing only the 8x32 FIR Coefficient for the profile 0. I have calculated it with your matlab code found in previous post.
          
 
          MEMORY MAP REGISTER DDC_0:
              --------------------------------------------------------------------
            Address[0x000-0x007]:  0x18   0xA6   0x01   0x00   0x0F   0x3F   0x00   0x00   
            Address[0x008-0x00F]:  0x00   0x01   0x80   0x00   0x00   0x00   0x00   0x18   
            Address[0x010-0x017]:  0x20   0x1E   0x09   0x00   0x01   0x60   0x00   0x00   
            Address[0x018-0x01F]:  0x04   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x020-0x027]:  0x00   0x4E   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x028-0x02F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x80   
              --------------------------------------------------------------------
            Address[0x100-0x107]:  0x00   0x00   0x00   0x00   0x3F   0x00   0x00   0x00   
            Address[0x108-0x10F]:  0x00   0x00   0x00   0x00   0x00   0xFF   0xFF   0x08   
            Address[0x110-0x117]:  0x00   0x00   0x02   0x25   0x00   0x00   0x00   0x00   
            Address[0x118-0x11F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x120-0x127]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x128-0x12F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x130-0x137]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x138-0x13F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x140-0x147]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x148-0x14F]:  0x00   0x01   0x02   0x03   0x00   0x00   0x00   0x00   
            Address[0x150-0x157]:  0x83   0x03   0x0F   0x07   0x0F   0x0F   0x20   0x00   
            Address[0x158-0x15F]:  0x00   0x00   0x3C   0x3D   0x3E   0x3F   0x3C   0x3C   
            Address[0x160-0x167]:  0x3C   0x3C   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x168-0x16F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x170-0x177]:  0x00   0xFF   0xFF   0x00   0x0F   0x00   0x00   0x00   
            Address[0x178-0x17F]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x180-0x187]:  0x87   0x00   0x82   0x27   0x00   0x00   0xAE   0x20   
            Address[0x188-0x18F]:  0x01   0x00   0x00   0x27   0x72   0x00   0x00   0x00   
            Address[0x190-0x197]:  0x10   0x00   0x18   0x00   0x1C   0x00   0x18   0x00   
            Address[0x198-0x19F]:  0x50   0x80   0x00   0x50   0x10   0x00   0x10   0x00   
            Address[0x1A0-0x1A7]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
            Address[0x1A8-0x1AF]:  0x00   0x00   0x00   0x00   0x00   0x00   0x00   0x00   
              --------------------------------------------------------------------
          
 
          Core[0]: Stream read from address 0xF00 for 32 byte:
            Address[0xF00-0xF07]:  0xFF 0x7F 0x00 0x80 0xFA 0x00 0x20 0x00 
            Address[0xF08-0xF0F]:  0x66 0x02 0x66 0x46 0x53 0x22 0xE6 0x67 
            Address[0xF10-0xF17]:  0x16 0x9B 0x89 0x02 0x59 0x18 0xD7 0x9D 
            Address[0xF18-0xF1F]:  0xC2 0x26 0x26 0x66 0xEA 0x6F 0x6A 0x44 
          
 
          Any suggestion to try?
          
 
          I have also any question:
          
 
          What is the correct time, in the write start-up sequence, for programming the coefficent of the FIR filter?
          
 
          If the external pin of TX_TRIG is tied low, if I set by SPI the bit5 of register 0x10C the trigger even occur?
          
 
          Have you a memory map dump of a correct configuration?
          
 
          Regards
          
 
          Piero
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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