复位是单片机的初始化操作。单片机启运运行时，都需要先复位，其作用是使CPU和系统中其他部件处于一个确定的初始状态，并从这个状态开始工作。因而，复位是一个很重要的操作方式。但单片机本身是不能自动进行复位的，必须配合相应的外部电路才能实现。-MCU reset is initialized to operate. Single-chip run-time shipment, all need to reset, and its role is to enable the CPU and other system components in a defined initial state, and from this state to work. Thus, the reduction is a very important mode of operation. However, single-chip itself is not automatically reset, and must tie in with the corresponding external circuitry can be achieved.