TMS320F280049: Fapi_doBlankCheck对Bank0Sector15执行检查出现异常的问题

我的程序中在擦除Sector前先检查其状态，如果已经是擦除状态，则不需要擦除。

程序中检查Bank0的Sector4~Sector14都没有问题，但是当对Bank0Sector15执行检查时，程序跳转到ROM代码中

以下是擦除单个扇区的代码：

#pragma CODE_SECTION(EraseSingleSector, ".TI.ramfunc");
//Erase single sector at address 
Fapi_StatusType EraseSingleSector(Uint32 u32StartAddress)
{
    Fapi_StatusType  oReturnCheck;
    Fapi_FlashStatusWordType oFlashStatusWord;

    //before erase ,check blank status
    oReturnCheck = Fapi_doBlankCheck((Uint32 *)u32StartAddress,Sector8KB_u32length,&oFlashStatusWord);
    if(oReturnCheck == Fapi_Status_Success) //this sector is blank,no need to erase
        return Fapi_Status_Success;

    oReturnCheck = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector,(Uint32 *)u32StartAddress);
    //wait uintil FSM is done with erase sector operation
    while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady)
    {
        ServiceDog();
    }
    if(oReturnCheck != Fapi_Status_Success) return oReturnCheck;

    //verify the sector is erased
    oReturnCheck = Fapi_doBlankCheck((Uint32 *)u32StartAddress,Sector8KB_u32length,&oFlashStatusWord);

    return oReturnCheck;
}

以下是连续擦除多个扇区时调用的代码：

    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector4_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector5_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector6_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector7_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector8_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector9_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector10_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector11_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector12_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector13_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector14_start))  return false;
    if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector15_start))  return false;

确认过所有操作FLASH的函数都在RAM中运行。

在线debug发现，当对Bank0Sector15执行Fapi_doBlankCheck时，程序异常

Fapi_doBlankCheck(0x8F000,0x800,&oFlashStatus)

Flash API参考手册中禁止调用此函数时给出的地址区间跨越bank边界，但是程序中并没有违反此规定：0x8F000 + 0x800 *2 = 0x90000

程序异常后跳转到地址 0x003F C7A5 处

根据参考手册中的(4.6.5.1 Boot ROM Memory Map)描述,此处代码位于Boot区域(0x003F AA00 ~ 0x3FE9CF)

请问是哪里出现了问题呢？