JPH0233641A - Semiconductor memory device - Google Patents

Abstract

PURPOSE:To avoid the consumption of a power supply for a period covering an unrecorded state through a recording of a first data by using a connection switch which secures the connection between a memory and a back-up power supply. CONSTITUTION:The data are stored in a semiconductor memory 3, and the memory 3 is backed up by a back-up power supply 5. A switch rod 7 is moved by a slide switch 6 and changed to an ON state from an OFF state and vice versa. The power supply 5 is electrically connected to the memory 3 in an ON state and disconnected from the memory 3 in an OFF state respectively. At the same time, the ON or OFF state is kept even after the movement of the rod 7 caused by the switch 6 is released.

Description

[Detailed description of the invention] Ru.

FIG. 1 shows an embodiment of the invention. In the figure, 1 is a semiconductor memory device and 2 is a CPU. Reference numeral 3 denotes a memory for storing data input manually through the connector 4, and reference numeral 5 denotes a backup battery as a backup power source for backing up the memory 3.

Reference numeral 6 denotes a slide switch for turning on/off the backup battery 5, which is turned on when the switch rod 7 is moved to the right from the state shown in FIG. 2(a), and to the left from the state shown in FIG. 2(b). is turned off when The slider of the slide switch 6 is normally not touched from the outside in consideration of erroneous erasure of the memory 3. The switch rod 7 connects the semiconductor memory device l to the data storage and reproducing device 8.
When the semiconductor memory device 1 is loaded into the device, it is moved rightward from the state shown in FIG. Moreover, when the switch rod 7 is loaded into the total eraser 9, the second
Even if the semiconductor memory device 1 is moved leftward from the state shown in FIG. 2A and removed from the all-erasing device 9, it remains at the moved position 2. IO is a contact, and when the semiconductor memory device 1 is loaded into the data storage and playback device 8, it comes into contact with the contact 11 of the data storage and playback device 8, and when it is loaded into the total eraser 9, it comes into contact with the contact 12 of the total eraser 9. It is supposed to be done. A solenoid 13 is provided in the total eraser 9 and moves the switch rod 7 so that the switch 6 is turned off.

First, when nothing is recorded in the memory 3, the slide switch 6 is turned off, as shown in FIG. 2(a). Therefore, no backup current flows in this state.

Next, this semiconductor memory device 1 is transferred to a data recording/reproducing device 8.
When loaded, the switch rod 7 is moved to the right in FIG. 2(a) by the protrusion 8t, and the slider of the slide switch 6 is moved to the closed position and the slide switch 6 is turned on. Then, the memory 3 and the like are initialized by the CPII 2, making it possible to record and reproduce data. On the other hand, even if the semiconductor memory device 1 is removed from the data recording/reproducing device 8, the slider of the slide switch 6 does not return automatically and remains, and the backup of the memory 3 continues without turning off the slide switch 6. FIG. 3 shows a state in which the semiconductor memory device 1 is loaded into the data recording/reproducing device 8.

Next, when erasing all of the recorded data, the semiconductor memory device is loaded into the total erasing device 9. In the case of complete erasure, current flows through the excitation coil of the solenoid 13, causing the solenoid 13 to pop out, causing the switch lot 7 to move as shown in Figure 2 (b).
) to the left and turn off the slide switch 6. Therefore, the memory 3 will no longer be backed up, and the memory 3 will be completely erased. This state is shown in FIG.

Since the semiconductor memory device of this embodiment is configured in this manner, it is possible to prevent battery consumption from being shipped from the factory until it is actually used by a user.

Furthermore, even after erasing all data, the battery can be prevented from being consumed until it is used again.

[Effects of the Invention] As explained above, according to the present invention, with the above configuration, it is possible to prevent consumption of the TL source from the unrecorded state until the first data is recorded. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a semiconductor memory device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram illustrating on/off operation of a slide switch 6 in the embodiment, and FIG. 3 is a block diagram showing a semiconductor memory device t in an embodiment of the present invention. FIG. 4 is a partially cutaway cross-sectional view showing the loaded state. FIG. 4 is a cross-sectional view showing the semiconductor memory device 1 loaded into the full eraser 9. 3...Memory, 5...Backup battery, 6...Slide switch. 6 Sui Sui・Kan Figure 1 Figure 3 Figure 2 Figure 4

Claims (1)

[Scope of Claims] 1) A semiconductor memory device having a semiconductor memory for storing data and a backup power source for backing up the semiconductor memory, the semiconductor memory device being capable of being turned from open to closed or from closed to open by operating force, and in a closed state. A switch that electrically connects the backup power source to the memory, electrically disconnects the backup power source from the semiconductor memory in an open state, and maintains the open state or the closed state even if the applied operating force is released. A semiconductor memory device comprising: