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Portable equipment based on non-volatile memory and method of realizing power failure protection

A technology for non-volatile storage and portable devices, which is applied in the fields of protecting storage contents from loss, climate sustainability, and sustainable buildings. The effect of removing storage space

Active Publication Date: 2007-04-18
FEITIAN TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is at the cost of storing a large number of operating codes in Flash, and developers need to write corresponding programs to prevent bad data from being generated after power failure. This software protection method requires a large amount of storage space to store firmware programs.

Method used

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  • Portable equipment based on non-volatile memory and method of realizing power failure protection
  • Portable equipment based on non-volatile memory and method of realizing power failure protection
  • Portable equipment based on non-volatile memory and method of realizing power failure protection

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Experimental program
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Effect test

Embodiment 1

[0035] As shown in FIG. 1 , a portable device implementing data power-off protection described in this embodiment is a USBKey, which specifically includes an MCU and a large capacitor.

[0036] The capacitor is built in the PCB board of the portable device, and is respectively connected to the host computer and the MCU, and the memory of the non-volatile structure is integrated in the MCU.

[0037] The MCU is built in the PCB board of the portable device, and is respectively connected with the host computer and the capacitor, and specifically includes an interface module, a storage module, a CPU, a low-voltage detection module, etc., and is used to implement program execution.

[0038] The interface module is a USB interface module, responsible for establishing a connection between the USB Key and the host.

[0039] The storage module has a Flash structure and is divided into a key data storage module and a firmware program storage module, which are respectively used to store ...

Embodiment 2

[0043] As shown in Figure 2, the working method of a device for implementing data power-down protection provided in this embodiment is as follows:

[0044] After step 201 starts, step 202 establishes a connection between the USB Key and the host, and the host provides working voltage to the USB Key.

[0045] Step 203: The USB Key communicates data with the host.

[0046] In step 204, the user rewrites the data in the storage module through the upper application program.

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Abstract

The invention discloses data power down protection technology based on non-volatile storage portable set. The portable set is set capacitance and low voltage detecting module to do low voltage detecting before data read-in and erasing for the non-volatile storage structure; if the voltage is abnormal, any operation doesn't be executed; if the portable set is power down while data read-in and erasing, capacitance discharges to supply required voltage to make the system finish oncoming operation. The invention can avoid bad data when the non-volatile storage is suddenly power down, can save firmware program development time and firmware code storage space, has higher data stored reliability and security compared with the existing method.

Description

technical field [0001] The invention belongs to data power-down protection technology, specifically a portable device using a non-volatile storage structure as the storage part to prevent bad data from being generated after power-down method of electrical protection. Background technique [0002] Flash: A non-volatile memory that can erase and reprogram memory cells. The write operation of any Flash device can only be performed in an empty memory cell or an erased memory cell. In most cases, erasure must be performed before the write operation. Flash memory is a kind of memory that has developed rapidly in recent years. It has the characteristics of EEPROM electrical erasure, and also has low power consumption, high density, small size, high reliability, erasable, rewritable, reprogrammable, writeable It has the advantages of fast data input and erasure speed. Generally speaking, the erasing and writing speed of the Flash memory can reach the millisecond level, but compar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/16
CPCY02B60/1225Y02D10/00
Inventor 陆舟于华章
Owner FEITIAN TECHNOLOGIES
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