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AD5544的18bit数据传输的问题

		
	
				

			

									
					    vonleen
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Sep 21, 2015 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
AD5544的18位数据由2bit地址位和16位数据位组成，采用标准SPI的时候一次传输8位数据该如何传输呢？是从17-0位放置数据还是23-6位放置数据呢。datasheet上说最后18位被保留不知道什么意思

			

			
									
		                             
                        

    

                                            
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