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中文摘要：
针对下一代无人机机载计算机系统中，对串口通信提出的新要求，尤其在串口扩展、特定的功能实现和较高的通信实时性方面，现有的专用集成电路难以满足．为此，采用VHDL硬件描述语言自顶向下的设计思想，按照FPGA（现场可编程门阵列）的设计流程，将通讯中所需的核心功能集成，完成UART设计．通过计算机仿真和实践验证，该设计能够准确、可靠地完成串行通信，符合系统要求，具有一定的推广性．
英文摘要：
Faced on the new requirement of Serial Communication in the next generation UAV＇s Airborne computer, especially in Serial Interface Extending,Realization of special function and high real-time in communicating, more existing IC can not suffice. Thus, the article choose the ＂top_ down＂ ideal by using VHDL , following the design flow of FPGA （Field Programmable Gate Array） ,integrating those core functions into FPGA during communication, completing UART designation. The computer simulation and verification shows it can accomplish Serial Communication and realize special functions correctly and reliably, according the system＇s requirement, it also can be popularized.
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