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Turning Off UART1

Yong-gil Hamm
Prodigy 40 points

I'm using UART1 ( P0.4 is TXD, P0.5 is RXD)

Initialization code is below

    PERCFG = 0x00;    
    
    U1CSR = 0x80;     // UART mode with idle status    
    U1GCR = 0x0B;     // LSB first    
    U1BAUD = 0xD8;    // BAUD 115,200    
    U1CSR |= 0x40;    // Enable Receive

    P2DIR |= PIN6;    // Highest Priority for UART1 on Port0
      
  
    P0SEL |= (PIN4 | PIN5);   // Peripheral for RXD/TXD




Turning Off code is below


    U1GCR = 0x00;
    U1BAUD = 0x00;
    U1CSR = 0x00;
    
    
    P0DIR = 0x00;
    P0SEL = 0x00;
    
    PERCFG = 0x00;
    
    U1UCR = 0x80;   




When I'm using UART1, Current consumption is 3.5mA


and after turned-off UART1, Current consumption is 2.5mA in sleep mode(PM2)


I don't know why the UART1 is not turned-off perfectly.




UART0(SPI / Alt.2) is works fine. Current consumption is 70uA in sleep mode(PM2).


70uA is basic current consumption of my device.




What is the problem?

								


				
				

				
			

		

			
						
									
                			    			            
						
						
			
			
			
			                        
			

				

			


			

		


				    			

				
    
					
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