采用Verilog语言开发了一款基于CPLD/FPGA平台的可裁剪MCU。该MCU包含一个核心模块和一些常用的接口模块,具有32位的程序/外设寻址空间。采用特殊的“或”总线结构,可以灵活增删指令及外设接口模块,以适应应用需要或节省资源。MCU采用HDL语言开发,可在任意平台CPLD/FPGA之间移植。该MCU已在实践中使用,具有一定的实用价值。

In the paper,the Verilog language is used to develop a tailorable MCU based on CPLD/FPGA platform.The MCU includes a core module and some commonly used interface modules.It has 32 bits program/peripheral addressing space.With special “OR” bus structure,the instruction and peripheral interface module can be flexibly added or deleted to meet the application needs or save resources.MCU is developed with HDL language and can be transplanted between any platform CPLD/FPGA.The MCU has been used in practice and the technology is mature.