在上电或复位过程中，控制CPU的复位状态：这段时间内让CPU保持复位状态，而不是一上电或刚复位完毕就工作，防止CPU发出错误的指令、执行错误操作，也可以提高电磁兼容性能。-At power-up or reset process, the control of the CPU reset state: this time, the CPU keeps the reset state, rather than a power-on reset is completed on or immediately work to prevent CPU sends the wrong instruction execution error operation can also be improved electromagnetic compatibility.