首页>
外国专利>
Accessing diagnostic program counter value data within data processing systems
Accessing diagnostic program counter value data within data processing systems
展开▼
机译:在数据处理系统中访问诊断程序计数器值数据
展开▼
页面导航
摘要
著录项
相似文献
摘要
A processing system 2 is described including a processor unit 4 and a memory 6. Diagnostic hardware 10 within the processing system 2 includes a shadow PC register 12 that stores a shadow program counter value following the true program counter value held within a program counter register 8 of the processor unit 4. The diagnostic hardware 10 is responsive to a program counter request signal from an external diagnostic system 14 to transfer a program counter value into a scan chain 16 from where it can be returned to the diagnostic system 14. The operation of the processor unit 4 is independent of any of the diagnostic operations and so true real time operation of the system may be observed and de-bugged.
展开▼