Microcomputer, electronic equipment, and debugging system

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MIYAYAMA YOSHIYUKI, KUDO MAKOTO, HIJIKATA YOICHI
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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].