__persistent unsigned long FRAM_write[WRITE_SIZE] = {0};
这句话是什么意思？__persistent是什么用法？求教大神解释
顺便附上整体程序：

#include "msp430.h"

void FRAMWrite(void);

unsigned char count = 0;
unsigned long data;
#define WRITE_SIZE 128

#if defined(__TI_COMPILER_VERSION__)
#pragma PERSISTENT(FRAM_write)
unsigned long FRAM_write[WRITE_SIZE] = {0};
#elif defined(__IAR_SYSTEMS_ICC__)
__persistent unsigned long FRAM_write[WRITE_SIZE] = {0};                                    //这句何解？
#else
#error Compiler not supported!
#endif

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

  // Configure GPIO
  P1OUT &= ~BIT0;                           // Clear P1.0 output latch for a defined power-on state
  P1DIR |= BIT0;                            // Set P1.0 to output direction

  // Disable the GPIO power-on default high-impedance mode to activate
  // previously configured port settings
  PM5CTL0 &= ~LOCKLPM5;

  // Initialize dummy data
  data = 0x00010001;

  while(1)
  {
    data += 0x00010001;
    FRAMWrite();                            // Endless loop
    count++;
    if (count > 100)
    {
      P1OUT ^= 0x01;                        // Toggle LED to show 512K bytes
      count = 0;                            // ..have been written
      data = 0x00010001;
    }
  }
}

void FRAMWrite(void)
{
  unsigned int i=0;

  for ( i= 0; i<WRITE_SIZE; i++)
  {
    FRAM_write = data;
  }
}


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