S08例程：本程序是KB模块的例程，所用资源为单片机内部KBI模块，所接器件为按键和LED，其中D2与PTA0，D3与PTA1，S2与PTA2，D3与PTA3相连接-S08 routines: This procedure is routine KB module, the resources used for the single-chip internal KBI module, the access device for the button and LED, of which D2 an