MSP430I2041启动程序后，初始化SD24采样，系统默认的16.348M时钟不对，并未找到如何恢复。如下是初始化的代码。

void vPortsd24Stop()
{
SD24INCTL2 &= ~SD24SC; // Set bit to start conversion
sd24OK = TRUE;
}

BOOL xPortsd24Init( UCHAR delay,UCHAR num)
{
BOOL bInitialized = TRUE;
sd24num = num;
// Configure GPIO
SD24CTL = SD24REFS; // Internal ref

SD24CCTL0 |= SD24GRP | SD24DF | SD24IFG | SD24SNGL; // Enable interrupt
SD24INCTL0 |= SD24INCH_6;
SD24CCTL1 |= SD24GRP | SD24DF | SD24IFG;
SD24CCTL2 |= SD24IE | SD24DF | SD24IFG;
SD24INCTL1 |= SD24GAIN_16;
SD24INCTL2 |= SD24GAIN_16;
SD24PRE1 = delay;
SD24PRE2 = delay;

delay_us(10);
return bInitialized;
}