p89c668是增强型５１单片机，带有ＩＩＣ接口，本程序使用硬件ＩＩＣ接口连接时钟芯片ＰＣＦ８５６３，调试环境使用ＷＡＶＥ-P89C668 is an enhanced single-chip microcomputer 51 with IIC interface, this program uses the hardware IIC interface clock chip PCF8563, debugging environment using WAVE