MICROPROCESSOR WITH BUILT-IN TRACE MEMORY AND TRACE METHOD

摘要

PURPOSE: To provide a microprocessor with built-in trace memory and a trace method by which instruction trace can be realized without impairing real-time processing by reducing the memory capacity of a circuit for instruction trace inside the microprocessor. CONSTITUTION: This microprocessor 101 for performing pipeline processing is incorporated with a cache memory 803 and provided with an incorporated register 811, an execution resources 812, an interruption receiving means 809, an instruction counter 802, an instruction decode means 810, an external input/ output means 804 and a trace memory 126. The microprocessor is provided with a first securing means 128, a second securing means 808, a first selecting means 117 and an external output means 127, and the trace memory 126 stores an output 118 of the first selecting means 117. Besides, the microprocessor is provided with a second selecting means 109, and the output 822 of the second selecting means 109 is connected to the write terminal of the incorporated register 811.