| #include "msp430x20x2.h" void main( void )
 {
 WDTCTL =  WDTPW + WDTHOLD;   // Stop WDT
 DCOCTL=   DCO2 |MOD1;
 BCSCTL1 = XT2OFF | RSEL3 | RSEL2 | RSEL1 | RSEL0;
 BCSCTL2 = DIVM0 | DIVS0 ;   //MCLK ,SMCLK使用DCOCLK,2分频
 BCSCTL3 = LFXT1S1;          //ACLK使用VLOCLK,不分频
 //DC0CLK              16M
 //MCLK                8M
 //SMACLK              8M
 //ACLK                9.26K  ???
 
 
 P1DIR |= 0x11;                            // P1.0,1 and P1.4 outputs
 P1SEL |= 0x11;                            // P1.0,4 ACLK, SMCLK output
 P1REN= 0x00;
 
 while(1)
 {
 }
 
 }
 
 |