用fpga nioss II 驱动实时时钟芯片pcf8563-Fpga nioss II drive with real-time clock chip pcf8563

来自于NIOSII的那些事，该书详细地介绍了NIOSS的使用过程，非常适合初学者。-From the NIOSII those things, the book are detailed in this paper NIOSS use process, very suitable for beginners.