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MSP430G2333改变DCO频率的问题请教

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通电后DCO初始化为1M后,应该怎么再切换为其它?下面是开始的初始化的1M,但是后面想再变用8M的话就有点懵了,想请教下该怎么切换的

WDTCTL = WDTPW + WDTHOLD;


DCOCTL = CALDCO_1MHZ;  
BCSCTL1 = CALBC1_1MHZ; 
BCSCTL3 |= LFXT1S_2; 

TA0CTL = TASSEL_2 + TAIE; 

TA1CTL = TASSEL_1 + TAIE; 


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