P3.0和P3.1同时也是仿真通讯口RxD和TxD,



在通过SST89E564仿真芯片的做硬件仿真时候，



需要通过RxD（P3.0）和TxD（P3.1）作为通讯端口



所以例程中的流水灯没有用这2个口

-P3.0 and P3.1 also simulated communication port RxD and TxD, SST89E564 simulation through hardware emulation chip to do when the need RxD (P3.0) and TxD (P3.1) as a communications port so the routines Light did not use water 2 port