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ADV7511W Recommended for New Designs
The ADV7511W is a 165 MHz High-Definition Multimedia Interface (HDMI™) transmitter, which is ideal for automotive infotainment applications. The digital...
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ADV7511W on Analog.com

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ADV7511W all registers read 0x13,why?



		

			

									
					    NewBee
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 2, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    hi, i have a problem,when i write adv7511w by i2c with address 0x72,it seems to be normal,but when i read from adv7511w,all registers eq 0x13,i dont know why?
    

    

    and,i find many users have faced this problem,so,how to fix it?
    

    

     
    

    i'm sure the hpd pull high ,and my schematic as follows:
    

    

     
    
										

    
				add pic
    
[edited by: NewBee at 8:58 AM (GMT 0) on 2 Sep 2019]
				
    
					
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      •  Super User  
      
            
			                            
                        
                on Sep 4, 2019 7:34 AM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      Please make sure with below things,
      

        For read backs are you doing the proper restart command?
      

        I2C driver performs the following sequence:
          Start condition - write operation (sub address) - Start condition - Read operation (data) - Stop condition
      Need to send STOP bit  when the whole process reading is done.To terminate a read/write sequence to the ADV7511W, a stop signal must be sent. For more details,Please refer section6.6(Inter-IC Communications) in ADV7511W-hardware-user-Guide
      

        And also crosscheck your i2c communication as per expert comments at https://ez.analog.com/video/f/q-a/114928/adv7511w-and-i2c-communication
      

      

      Thanks,
      

      Poornima
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Sep 6, 2019 2:50 AM
            
            
												
						in reply to PoornimaSubramani
					
									
        
	
        

		
		
        
					
        im sure my iic driver has standard sequence ,and i often  contorl max96705/96706 ,
        

        and my iic clk rate set 40K,does it matter?
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        •  Super User  
        
            
			                            
                        
                on Sep 6, 2019 10:12 AM
            
            
												
						in reply to NewBee
					
									
        
	
        

		
		
        
					
        Hi,
        

         Please crosscheck with below things for i2c characteristics,
        

            
        

        And also refer here for I2C Specific Tips at https://ez.analog.com/mems/w/documents/4500/debugging-communication-problems-with-mems-sensors-i2c-or-spi
        

        Thanks,
        

        Poornima
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        •  Super User  
        
            
			                            
                        
                on Sep 9, 2019 3:10 PM
            
            
												
						in reply to PoornimaSubramani
					
									
        
	
        

		
		
        
					
        One thing to keep in mind is we use 8-bit addressing while some drivers use 7-bit addressing.  If your driver expects 7-bit addressing then you have to right the 8-bit address by one before sending it to the driver.  Just a thought.  0x74 >> 1 -> 0x39
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Sep 12, 2019 4:32 AM
            
            
												
						in reply to GuenterL
					
									
          
	
          

		
		
          
					
          thanks.
          

          what i use is 8-bit addressing.and write & read both can receive "ack".
          

           I2C_write_8bit(0x39,0x41,0x10);usleep(1000);
           I2C_write_8bit(0x39,0x98,0x03);usleep(1000);
           I2C_write_8bit(0x39,0x9A,0xE0);usleep(1000);
           I2C_write_8bit(0x39,0x9C,0x30);usleep(1000);
           I2C_write_8bit(0x39,0x9D,0x61);usleep(1000);
           I2C_write_8bit(0x39,0xA2,0xA4);usleep(1000);
           I2C_write_8bit(0x39,0xA3,0xA4);usleep(1000);
           I2C_write_8bit(0x39,0xE0,0xD0);usleep(1000);
           I2C_write_8bit(0x39,0xF9,0x00);usleep(1000);
          

          I2C_write_8bit(0x39,0x15,0x00);usleep(1000);
           I2C_write_8bit(0x39,0x16,0x30);usleep(1000);
           I2C_write_8bit(0x39,0x17,0x02);usleep(1000);
           I2C_write_8bit(0x39,0x56,0x1a);usleep(1000);
          

          I2C_write_8bit(0x39,0x18,0x40);usleep(1000);
           I2C_write_8bit(0x39,0xAF,0x06);usleep(1000);
          

           I2C_read_8bit(0x39,0x41,&read_buf); xil_printf("0x41=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x98,&read_buf); xil_printf("0x98=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x9A,&read_buf); xil_printf("0x9A=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x9C,&read_buf); xil_printf("0x9C=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x9D,&read_buf); xil_printf("0x9D=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0xA2,&read_buf); xil_printf("0xA2=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0xA3,&read_buf); xil_printf("0xA3=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0xE0,&read_buf); xil_printf("0xE0=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0xF9,&read_buf); xil_printf("0xF9=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x15,&read_buf); xil_printf("0x15=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x16,&read_buf); xil_printf("0x16=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x17,&read_buf); xil_printf("0x17=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x56,&read_buf); xil_printf("0x56=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0x18,&read_buf); xil_printf("0x18=%x\n\r",read_buf);usleep(1000);
           I2C_read_8bit(0x39,0xAF,&read_buf); xil_printf("0xAF=%x\n\r",read_buf);usleep(1000);
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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													0
							
			
				
									
							        
			
			
			
            
            
			                            
                        
                on Sep 12, 2019 4:32 AM
            
            
												
						in reply to GuenterL
					
									
            
	
            

		
		
            
					
            thanks.
            

            what i use is 8-bit addressing.and write & read both can receive "ack".
            

             I2C_write_8bit(0x39,0x41,0x10);usleep(1000);
             I2C_write_8bit(0x39,0x98,0x03);usleep(1000);
             I2C_write_8bit(0x39,0x9A,0xE0);usleep(1000);
             I2C_write_8bit(0x39,0x9C,0x30);usleep(1000);
             I2C_write_8bit(0x39,0x9D,0x61);usleep(1000);
             I2C_write_8bit(0x39,0xA2,0xA4);usleep(1000);
             I2C_write_8bit(0x39,0xA3,0xA4);usleep(1000);
             I2C_write_8bit(0x39,0xE0,0xD0);usleep(1000);
             I2C_write_8bit(0x39,0xF9,0x00);usleep(1000);
            

            I2C_write_8bit(0x39,0x15,0x00);usleep(1000);
             I2C_write_8bit(0x39,0x16,0x30);usleep(1000);
             I2C_write_8bit(0x39,0x17,0x02);usleep(1000);
             I2C_write_8bit(0x39,0x56,0x1a);usleep(1000);
            

            I2C_write_8bit(0x39,0x18,0x40);usleep(1000);
             I2C_write_8bit(0x39,0xAF,0x06);usleep(1000);
            

             I2C_read_8bit(0x39,0x41,&read_buf); xil_printf("0x41=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x98,&read_buf); xil_printf("0x98=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x9A,&read_buf); xil_printf("0x9A=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x9C,&read_buf); xil_printf("0x9C=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x9D,&read_buf); xil_printf("0x9D=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0xA2,&read_buf); xil_printf("0xA2=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0xA3,&read_buf); xil_printf("0xA3=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0xE0,&read_buf); xil_printf("0xE0=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0xF9,&read_buf); xil_printf("0xF9=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x15,&read_buf); xil_printf("0x15=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x16,&read_buf); xil_printf("0x16=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x17,&read_buf); xil_printf("0x17=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x56,&read_buf); xil_printf("0x56=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0x18,&read_buf); xil_printf("0x18=%x\n\r",read_buf);usleep(1000);
             I2C_read_8bit(0x39,0xAF,&read_buf); xil_printf("0xAF=%x\n\r",read_buf);usleep(1000);
            
			
            

		
		
		
		
	
            
	
            
		
            
			
		
            
	
            
	
            
		
						
						
				
						
				
				
		
		
            
			
		
            
	
            

            

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