| 摘要 |
PURPOSE:To generate a breakpoint interruption without increasing storage capacity by providing a data processor having a readable/writable storage device with a breakpoint interruption indicating means. CONSTITUTION:A microprocessor 3 is connected to an external register group 1, a parity generator 2-3 and a parity checking circuit 2-4. In the test mode, the Q output of an FF 1-1 and the Q output of an FF 1-2 are turned to ''1''. The same information as that read out from a specified area in a memory is read out from the microprocessor 3 and written in a memory 2-2. The parity checking circuit 2-4 turns an output line 2-10 to ''1'' to generate an interruption. Consequently, the Q output of an FF 1-3 is turned to ''1'' and the breakpoint interruption is detected. Thus, a program can be tested by a simple circuit. |
