| 摘要 |
PURPOSE:To improve measuring accuracy of real time performance and converage by two-dimensionally arraying coverage memories storing the number of execution addresses and duplicating the address circuit. CONSTITUTION:When a target CPU executes a program, outputs CRLX and CTLY in a segment memory change. Simultaneously an address conversion memory output and a reference address ADDR' composed of addresses outputted from the CPU are outputted. Elements in the array of the coverage memory 200 are accessed, namely, hit by the reference address ADDR' and addresses X and Y made of the CTLX and CTLY in the segment memory. If the address information CTLX and the address information CTLY conflict, that is, the end point of some segment is the start point of other segment, latch circuits 206 and 207 are duplicated in order to surely select the segment memory, thereby avoiding contention.
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