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AD7705无法读取数据



		

			

									
					    zengmin@2015
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 12, 2017 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    AD7705采用3.3V供电，REF=2.5V，按照数据手册写入 0x20  0x0c  0x10  0x40，写入0x38后，读出16位数据始终是0x8001.不知问题出在什么地方。