MSP430F149；Part II: Basic Clock

    #include <msp430.h>
    
    int main(void)
    {
      WDTCTL = WDTPW +WDTHOLD;                  // Stop Watchdog Timer
      DCOCTL = DCO0 + DCO1 + DCO2;              // Max DCO
      BCSCTL1 = RSEL0 + RSEL1 + RSEL2;          // XT2on, max RSEL
      BCSCTL2 |= SELS;                          // SMCLK = XT2
      P5DIR |= 0x70;                            // P5.6,5,4 outputs
      P5SEL |= 0x70;                            // P5.6,5,5 options
    
      while(1)
      {
      }
    }