文章提出了一種嵌入式微處理器的在線調試模塊。這個模塊可以用較少的硬件開支實現一些強大的調試功能：響應硬件和軟件觸發，提供開始/停止調試模試；單步調試操作；程序執行的跟蹤；代碼內存、外部數據存儲器、SFR、內部數據存儲器的讀和寫。文章首先介紹了嵌入式微處理器可調試模塊設計的原理，其次介紹了在線調試的結構設計，最后給出結論和分析。
關鍵詞 嵌入式微處理器 片上可調試系統 SFR
Abstract : The paper presents an on-chip debug mode for embedded microprocessors. With little hardware overhead, the debug mode can give some powerful debug functions. For example, providing start/stop program execution in response to both hardware and software triggers, single step operation , program execution tracing, code memory read or write, external data memory read or write, SFR read or write, internal data memory read or write. Firstly ，the paper introduces the theory of the debug mode,then it introduces the structure of the mode, and finally gives the conclusion and practical analysis.
Keywords: Embedded microprocessor, On-chip debug mode, SFR