| 摘要 |
PURPOSE:To enable to protect a storaged content even at sudden power supply interruption, by storing the module information used at the power supply interruption and the information of major loop location at interruption, into the memory chip. CONSTITUTION:When the driving is stopped through the detection of the power supply interruption signal with the power supply interruption detecting circuit 22, if the bubble accessed in the memory chip 6 is in the major loop MAJ, the chip 6 is selected with the selection circuit 21 after the bubble of the module 28 is stopped, and it is driven with the auxiliary power supply 24. Thus, the power supply 24 can only be held until the write-in is finished after the interruption of the main power supply 23. At the application of the power supply, the chip 6 is driven and the module information and major location information which are stored are read out through the sensing circuit 27 and major location detecting circuit 20. Thus, a plurality of modules is stopped immediately by using one exclusive chip. |
