| 摘要 |
PURPOSE:To perform the effective sequence control of the copying machine through the use of multiple input pulses by giving priority sequence to different clock pulses. CONSTITUTION:When the different clock pulses outputted by a zero cross pulse generating circuit U7, timing pulse generating circuit U10 and variable zooming pulse generating circuit U11 and the detection pulses or the like from a power source down detecting circuit U8 and timing mark sense circuit U9 are applied to a CPU U1 which performs the vector interruption of respectively weighted four or the like, then priority sequence is given according to the pulse. As a result of this, the addressing to interrupt service routine is accomplished by way of the CPUs U2-U6, etc. formed by ROM, RAM, etc. and the effective sequence control of the copying machine is accomplished with the simple constitution. |
