| 摘要 |
<p>PURPOSE:To switch an operating mode without using an exclusively used input pin by fetching a signal on a bus signal line when an initializing signal is inputted and switching the acting mode. CONSTITUTION:A microprocessor 1 includes a receiver 4 which is connected to an initializing signal input pin 2 and receives a signal on an initializing signal line 101, a receiver 6 which is connected to a bus signal I/O pin 3 and receives the signal on the bus signal line 103, a try state driver 7 and a type-D flip-flop 5. Outputs of the receivers 4 and 6 are held by the type-D flip-flop 5, and switch the acting mode of the microprocessor 1.</p> |
