MSP430F449: LFXT1 configuration procedure

MSP430 Team,

When configuring the LFXT1 to start on MSP430F4xx devices (e.g., F449), code examples typically show a delay after clearing the OFIFG bit and then looping around, like this:

  // Loop until 32kHz crystal stabilizes
  do
  {
    IFG1 &= ~OFIFG;                         // Clear oscillator fault flag
    for (i = 50000; i; i--);                // Delay
  }
  while (IFG1 & OFIFG);                     // Test osc fault flag

I believe the delay is there to allow the OFIFG bit to set again, but I don't see this documented anyplace.  Also, some code examples do not show the delay.

Is the delay needed?  If so, how long a delay is required?  Is this documented anyplace?

Thank you,

David