MSP430F249 I/O timings

Other Parts Discussed in Thread: MSP430F249

Hello,

I'm using a MSP430F249 with a 16MHz quartz on XT2.

For test Im running this sample program :

#include "msp430x24x.h"

volatile unsigned int i;

void main(void)
{
      WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT

      P5DIR |= 0x10;                            // P5.4= output direction
      P5SEL |= 0x10;                            // P5.4= MCLK option select
      P3DIR |= BIT2;                            // P3.2 = output direction

    BCSCTL1 &= ~XT2OFF;
    BCSCTL3 |= XT2S_2; // Select 3-16MHz crystal range

    // Starts at 1MHz with internal oscillator
    // Wait 50 ms the external oscillator start
    // 1 us by tick
    while (i < 50000)
    {
        __no_operation();
        i++;
    }
   
    // Then configure to external
    BCSCTL2 |= SELS + SELM_2; // Select XT2CLK
       
  for (;;)                                  // Infinite loop
  {
    P3OUT |= BIT2;                          // P3.2 = 1
    P3OUT &= ~BIT2;                         // P3.2 = 0
    P3OUT |= BIT2;                          // P3.2 = 1
    P3OUT &= ~BIT2;                         // P3.2 = 0
    P3OUT |= BIT2;                          // P3.2 = 1
    P3OUT &= ~BIT2;                         // P3.2 = 0
  }

Ive 3.6µs between each edges. This seems to me slow ...

What do you think ?