内含：串口收发程序，I/O口应用程序，模数转换程序，以及初始化等单片机入门应用。是freescale 9S12XE系列单片机入门难得的好资料。-freescale MC9S12XEP100 development board DEMO C language source code. Includes: serial transceiver procedures, I/O port applications, analog-to-digital conversion process, as well as entry-single-chip applications, such as initi