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ADM3491 进行485通讯时 收不到数据



		

			

									
					    wangjian
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 6, 2017 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    这是我的电路图，485通讯时RXD1+和TXD1+以及RXD1-和TXD1-已跳线短接，使能置0，上位机485发送，下位机单片机就是收不到。一样的程序我直接单片机用串口TTL电平与电脑通讯可以的，求解释啊。
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 RS-232 / RS-422 / RS-485 / RS-562
                
                                                    
                 adm3491
                
                                                    
                 RS-485 and RS-422
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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