DEBUG INFORMATION TRANSFER INTERFACE

摘要

PROBLEM TO BE SOLVED: To provide an improved interface for transferring debug information. SOLUTION: A microcomputer having a processor and a debug circuit is provided with an exclusive link for transferring information between the processor and the debug circuit for supporting a debug operation. The processor supplies program counter information, and the program counter information is stored in the memory map type register of the debug circuit. The program counter information may be obtained as the value of a processor program counter positioned at the write back stage of a processor pipe line. Also, trace information including message information is transferred through the exclusive link in a non-intrusive mode. This microcomputer may be constituted as a single integrated circuit.