MC9S12G系列芯片，FLASH擦写时能开总中断吗？

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求助线上FAE FLASH擦写可以开中断吗（所用芯片是MC9S12G48）？因为擦（PFLASH）FLASH Sector时有好几十毫秒延时，关了总中断，定时器的定时时间就会有偏差，还有CallFnCmdInRam这个函数，为什么擦FLASH时要放到RAM执行，顺便发送一份擦FLASH的函数代码给予那些FLASH擦写没函数的学友们。

byte IFsh1_EraseSector(IFsh1_TAddress Addr)
{
  if (BlockOutOfRange(Addr, Addr)) {   /* Check range of address */
    return(ERR_RANGE);
  }
  EnterCritical();                     /* Enter critical section */
  ClearFlags();                        /* Clear all flags */
  if (FSTAT_CCIF == 0U) {              /* Is command buffer full ? */
    ExitCritical();                    /* Exit critical section */
    return ERR_BUSY;                   /* If yes then error */
  }
  FCCOBIX = 0U;                        /* Clear index register */
  FCCOBHI = 0x0AU;                     /* Erase P-Flash sector command */
  FCCOBLO = (byte)(Addr >> 16U);       /* High address word */
  FCCOBIX++;                           /* Shift index register */
  FCCOB = (word)(Addr & 0xFFFFFFF8UL); /* Low address word aligned to 8 byte phrase*/
  CallFnCmdInRam();                    /* Copy Wait in RAM routine to stack and launch the flash process */
  if (FSTAT_FPVIOL == 1U) {            /* Is protection violation detected ? */
    ExitCritical();                    /* Exit critical section */
    return ERR_NOTAVAIL;               /* If yes then error */
  }
  if (FSTAT_ACCERR == 1U) {            /* Is acces error detected ? */
    ExitCritical();                    /* Exit critical section */
    return ERR_NOTAVAIL;               /* If yes then error */
  }
  if (FSTAT_MGSTAT) {                  /* Was attempt to erase the sector errorneous? */
    ExitCritical();                    /* Exit critical section */
    return ERR_VALUE;                  /* If yes then error */
  }
  ExitCritical();                      /* Exit critical section */
  return ERR_OK;                       /* OK */
}

/*部分调用函数*/
#define EnterCritical() \
/*lint -save  -e950 -esym(960,14.3) Disable MISRA rule (1.1,14.3) checking. */\
    { __asm(pshc); __asm(sei); __asm(movb 1,SP+,CCR_reg); } /* This macro is used by Processor Expert. It saves CCR register and disable global interrupts. */ \


#define ExitCritical() \
/*lint -save  -e950 -esym(960,14.3) Disable MISRA rule (1.1,14.3) checking. */\
    { __asm(movb CCR_reg, 1,-SP); __asm(pulc); } /* This macro is used by Processor Expert. It restores CCR register saved in SaveStatusReg(). */ \


#define ClearFlags()  (FSTAT = 0x30U)

static void FnCmdInRam_(void)
{
  FSTAT = 0x80U;                       /* Clear flag command buffer empty */
  while (FSTAT_CCIF == 0U) {}          /* Wait to command complete */
  return;
}
#pragma MESSAGE DISABLE C12056         /* Disable warning C12056 "SP debug info incorrect becouse of optimization or inline assembler" */

/* Types definitions */

typedef struct {
   uint8_t code[15];             /* Structure required to copy code to ram memory */
  /* Size of this structure needs to be at least (but best) the size of the FnCmdInRam_ */
} FnCmdInRamStruct;

typedef void (* near pFnCmdInRam)(void);


#pragma MESSAGE DISABLE C1805          /* Disable warning C1805 "Non-standard conversion used" */
/*lint -save  -e740 -e931 Disable MISRA rule (1.2) checking. */
static void CallFnCmdInRam()
{
  FnCmdInRamStruct FnCmdInRam = *(FnCmdInRamStruct *)(FnCmdInRam_); /* Create a copy of Wait in RAM routine on stack */

  ((pFnCmdInRam)&FnCmdInRam)();        /* Call code in RAM */
  return;
}

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