TRACE CONTROL CIRCUIT

摘要

PURPOSE: To solve a problem that the number of bits of a trace bus must be increased or the speed of a trace clock signal must be increased in order to trace the operation of a CPU on a real-time basis in the conventional microcomputer having a decoding circuit. CONSTITUTION: This trace control circuit is provided with a branch event generating circuit 1 having an address omission information generating circuit 8 detecting an overlapped portion from the upper address side between a branch origin address and a branch end address and a trace data omitting circuit 5 omitting part of trace data based on the address omission information and outputting the partially omitted trace data.