The Design Of Universal Programmer And Software For M68HC08 MCUs

After 8-bit M68HC08 MCUs coming into market Motorola company works hard in spreading their application actively in China. Because of rapid-speed, high-performance, lower power, low-cost and so on, the MCUs have come into every application area. At the same time, Motorola company produces various new subfamily to fit into different field. The new kinds of MCUs appear constantly.To satisfy the user' s demand, Motorola company has offered the development tools and programmers of the M68HC08 family. However they are too expensive to accept by some users. So some users design the programmer for one kind of MCU to satisfy themselves. In Fact, the idea of the different kinds of programmer of M68HC08 MCUs is same. A universal, extended and low-cost programmer is anticipant to save the development time.The paper mainly studies how to design the hardware and software of the M68HC08 family universal programmer based on MC68HC908JB8, which is a member of this family and includes USB module. First the paper introduces the history of the programmer, the actuality of research and the development background. Then, expatiates the design of hardware system, software system of base-board and PC. At Last, gives the way to using programmer and adding new adapters.