| 摘要 |
PURPOSE: To provide a data processor capable of preventing the continuous operation of a specific mode when a normal mode is switched to the specific mode in error. CONSTITUTION: The data processor is provided with a power ON clear circuit 1 for outputting an initializing signal at the time of turning on a power supply, a flip flop 2 allowed to output a specific mode signal 102 at the time of turning on the power supply and to be reset at the time of resetting the specific mode, a NAND circuit 5, a timer 6 driven at the time of the specific mode, and when a specific mode continuation request signal is not outputted, capable of resetting the specific mode and outputting an internal reset signal 104, NOR circuits 7, 15, an inverter 8, a user ROM 10 including a user program in it, a specific mode ROM 11 including a program to be used in the specific mode, a switch 12, an instruction latch 13, a CPU 14, and an input block 9 for outputting the level state of a mode input terminal 16 to a CPU 14 at the time of a test mode. |
