中斷是嵌入式系統中處理器的必備功能。文章詳細論述了設計TDN-CM++系統中斷功
能的方法和過程。提出在復雜可編程邏輯器件ispLSI1032芯片上設計指令譯碼器等硬件電路的設計原理、CPU設計中微指令格式修改方案和中斷響應等微程序流程。最后，將此系統與擴充模塊相結合構成整機系統，搭建測試平臺，對中斷系統進行全面的測試。測試結果表明該系統實現了中斷系統功能。
[關鍵詞] 中斷實現;ispLSI1032;TDN-CM++
[Abstract] The processor must afford Interruption function in embeded system.The article discusses particularly the design for interruption function based on TDN-CM++ system, brings forward the principium of instruction encoder on ispLSI1032,the modification of microinstruction format and the microprogram flow of response to interruption .To test the interruption system ,puts up the test platform by connecting expansion modules .The result of test indicates that the system implements the interruption function.
[Key words] implement of interruption function;ispLSI1032;TDN-CM++