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LTC2873 Production
The LTC2873 is a robust pin-configurable multiprotocol transceiver that supports RS232, RS485, and RS422 protocols while operating on a single 3V to 5...
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LTC2873 on Analog.com

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DC2364 Demo Board is not receiving (can Tx but no Rx)



		

			

									
					    gaminid
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 11, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  DC2364 
    
    		        		    		    	
			
    I am trying to use the DC2364 demo board to make sure I can send and receive 485 data before integrating LTC2873 on my 485/232 comms board. I have set up the jumpers correctly on the demo board and using a single 3.3V supply. The DI and RO are driven by a uC from an external board. I can send 485 data via uC (haven't tested 232 yet) but cannot receive any data. WIth an oscilloscope, I can confirm incoming data on A/DO & B/RI pins but nothing shows up on the RO pin. What am I doing wrong here? Any help is greatly appreciated. I have inserted the photo of the demo board showing the jumper positions. 
    

    Thanks
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 interface and isolation
                
                                                    
                 DC2364
                
                                                    
                 hardware
                
                                                    
                 Multiprotocol Transceivers
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi Gaminid,
      

      Your jumper settings look correct if you connect both VL and VCC to a 3.3V supply, half-duplex mode without termination. Can you verify the voltage level on /RE485\ pin? This should confirm whether the receiver is enabled or not. If the voltage level on /RE485\ pin is low, can you please send a scope shot including the receiver inputs (A/DO & B/RI) and output (RO) signals?
      

      Best,
      

      Jane
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi Gaminid,
      

      Your jumper settings look correct if you connect both VL and VCC to a 3.3V supply, half-duplex mode without termination. Can you verify the voltage level on /RE485\ pin? This should confirm whether the receiver is enabled or not. If the voltage level on /RE485\ pin is low, can you please send a scope shot including the receiver inputs (A/DO & B/RI) and output (RO) signals?
      

      Best,
      

      Jane
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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