Microcomputer, electronic equipment, and debugging system

Details Microcomputer, electronic equipment, and debugging system Microcomputer, electronic equipment, and debugging system

2005-07-26

2005-07-26

Bonzo, Bryce P (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S045000, C717S128000

Reexamination Certificate

active

06922795

ABSTRACT:
The present invention provides a microcomputer that makes it possible to implement a real-time trace on a mass-produced chip using few terminals, acquire trace information from within a specified range, and measure execution times, together with electronic equipment and a debugging system comprising this microcomputer.A trace information output section (16) outputs trace information for implementing a real-time trace, to four dedicated terminals. It outputs instruction execution status information (DST[2:0]) of the CPU to three terminals and the PC value (DPCO) of a branch destination when an PC absolute branch has occurred, serially to one terminal. A microcomputer (10) outputs information indicating the start and end of a trace range or execution-time measurement range to DST[2] in a predetermined sequence. A debugging tool (20) determines the start and end of the trace range or execution-time measurement range from the values in DST[2].

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GDB developers “9. Tracepoints” Copyright Free Software Foundation, Mar. 29, 2002.

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