1.C8051F320做的测试USB速度可到240KBps. 包含单片机源码,驱动和上位机程序2.MCUc8051f040用自带的IIC控制器读写实时钟芯片PCF8563,完成BCD码到十进制码转换3.PCF8563的驱动程序,通过模拟IIC总线对PCF8563进行访问,有完整的读写报警,定时中断,最后把时间显示在LED上4.USB CDC using C8051F320340, virtual COM port thru usb connection5.本库函数实现了C8051F020 SMBUS总线的驱-1. Test with C8051F320 do USB speed to 240 KBPS. Includes MCU source, driver and PC application 2. MCUc8051f040 with built-in real-time clock chip PCF8563 IIC controller, speaking, reading and writing, and complete the BCD code to decimal code conversion 3. PCF8563 drivers, by simulating the IIC bus PCF8563 for access, read and write a complete report to the police, timing interrupt, finally the time display on LED 4. USB CDC using C8051F320340, virtual COM port thru USB connection5. The library function to achieve the C8051F020 SMBUS bus drive