CN2483767Y - Modified micro memory card with write protection function - Google Patents

Abstract

This design is an improved miniature memory card with anti-write function, which includes: a closed shell with a micro-controller and several groups of storage bodies inside, and an external connector; a switch to prevent data writing Circuitry, which is exposed outside the housing via a micro switch for switching operation.

Description

Modified micro memory card with write protection function

Most of the compact flash memory cards (Compact FlashCard) currently used in general consumption and industrial purposes must have the function of saving the stored data for a long time. However, it lacks a mechanism to protect the stored data, so important data is often overwritten or deleted.

In order to improve the above shortcomings, other mechanisms must be added on the system side, such as reconfirmation of overwriting or deleting data commands, but in the case of a wide variety of systems, it is not easy to require all systems to add this mechanism.

The purpose of this design is to provide a micro memory card with write-proof function.

In order to achieve the above purpose, this design adopts the following technical solutions:

1. A closed casing with a microcontroller and several sets of storage bodies inside, and an external connector; a switching circuit to prevent data writing, which is exposed outside the casing through a micro switch for switching operation ;

2. The size is corresponding to the traditional micro flash memory card;

3. Use a micro switch to switch the voltage level or current level, so that the microcontroller can activate or inhibit the anti-write function of the micro memory card;

4. Use a micro switch to switch the voltage level or current size, so that the storage body's anti-write function can be activated or suppressed;

5. The micro switch is located on the edge of the shell;

6. The micro switch is located on one surface of the casing.

For further explanation of the specific technical content of this design, first please refer to the accompanying drawings, wherein, Fig. 1 is a system structure diagram of this design embodiment, Fig. 2 is a schematic diagram of this design micro-switch located at the edge of the frame, Fig. 3 is a schematic diagram of this design Schematic diagram of designing a microswitch on one side of a memory card.

As shown in Figure 1, the micro memory card of this design has a microcontroller (controller) 1, some memory banks (flash memory) 2, a switching circuit 3 and a connector 4 that can be connected externally.

Among them, the function of microcontroller 1 is to decode the digital camera or related input data into commands such as read, write, and delete, and decode them into commands such as read, write, and delete required by the storage body, so it is connected to the storage body 2 and connected to the storage body 2. The device 4 is used for external connection, that is, it can be externally connected to a digital camera as a signal transmission.

The innovation of this design is to add a switching circuit 3 operated by a switchable micro switch 31, which together with the microcontroller 1 forms a circuit that can prevent data from being written, and utilizes the micro switch 31 to set Determine whether the anti-writing function is enabled (enable), and the microcontroller 1 detects the setting of the micro switch 31 through a special function pin (WP) 11, and when it detects that the logic level is 1, then Indicates that the anti-write function is disabled (disable). At this time, a digital camera can write or delete the memory bank 2 through the microcontroller 1 through the host interface (Host Interface); if it is detected that the micro switch 31 is set When the logic level is 0, it means that the anti-write function is enabled (enable). At this time, the write or delete command is blocked and the command aborted is sent back to the digital camera to achieve the function and purpose of data protection. .

In order to enable the user of the memory card to easily set its anti-write function, therefore, this design adds a micro switch 31 on the memory card, to change the state of the pin (WP) 11 by switching the micro switch 31, so as to Reach anti-write function, and this microswitch 31 can be located at the frame edge portion as shown in Figure 2, also can be located at the top or bottom of shell as shown in Figure 3, all can reach same function.

Claims (6)

1. An improved micro-memory card with anti-write function, characterized in that: a closed casing with a microcontroller and a plurality of storage bodies inside, and an external connector; The switching circuit is exposed outside the casing through a micro switch for switching operation. 2. The improved micro memory card with anti-write function according to claim 1, characterized in that: the size is corresponding to the traditional micro flash memory card. 3. The improved micro-storage card with anti-write function according to claim 1, characterized in that: the voltage level or the magnitude of the current is switched by a micro-switch for the micro-controller to activate the anti-write function of the micro-storage card. enable or suppress energy. 4. The improved micro-memory card with anti-write function according to claim 1, characterized in that: the voltage level or the magnitude of the current is switched by a micro-switch, so that the anti-write function of the memory bank is enabled or suppressed. 5. The improved micro-storage card with anti-write function according to claim 1, characterized in that: the micro-switch is arranged at the edge of the casing. 6. The improved micro-memory card with anti-write function according to claim 1, wherein the micro-switch is arranged on one surface of the casing.

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