请问，我用CCS3.1 F2812的simulator 时，错现如下问题：

DevEmuRegs.M0RAMDFT = 0x0300;
DevEmuRegs.M1RAMDFT = 0x0300;
DevEmuRegs.L0RAMDFT = 0x0300;
DevEmuRegs.L1RAMDFT = 0x0300;
DevEmuRegs.H0RAMDFT = 0x0300;
当运行到上面几句时，提示如下错问：
Can't Run Target CPU: Can't write to data memory 0x950, check memory config [-2184]
Can't Run Target CPU: Can't write to data memory 0x951, check memory config [-2184]
Can't Run Target CPU: Can't write to data memory 0x952, check memory config [-2184]
Can't Run Target CPU: Can't write to data memory 0x953, check memory config [-2184]
Can't Run Target CPU: Can't write to data memory 0x954, check memory config [-2184]

cmd文件中
MEMORY
{
PAGE 1 :
/* Peripheral Frame 0: */
DEV_EMU : origin = 0x000880, length = 0x000180
}
SECTIONS
{
DevEmuRegsFile : > DEV_EMU, PAGE = 1
}

请问这是什么原因啊