阅读说明：本技术 一种电子盘的多功能物理自毁和掉电保护方法及电路 (Multifunctional physical self-destruction and power-down protection method and circuit for electronic disk ) 是由 刘升 韩延良 唐伟 于 2019-12-09 设计创作，主要内容包括：一种电子盘的多功能物理自毁和掉电保护方法及电路,属于电子盘技术领域,当掉电信号触发时,储能电容依次经能量控制单元和隔离电路给存储芯片供电,完成掉电保护；当物理自毁信号触发时,能量控制单元中断向存储芯片供电；同时储能电容给物理自毁电路供电,经物理自毁电路向存储芯片执行物理自毁操作,完成物理自毁。通过物理自毁控制电路、物理自毁电路、能量控制电路、储能电容以及隔离电路对异常进行判断,能智能切换到所需的工作模式下,让其能在掉电模式下限流输出给电子盘提供数据保护,物理自毁模式下,瞬间大电流输出。电路简单,器件少,而且整个储能完全独立,对主机电源无依赖性,且内部隔离处理,其物理自毁过程可靠度高。(A multifunctional physical self-destruction and power-down protection method and circuit of an electronic disk belong to the technical field of electronic disks, when an electric signal is triggered, an energy storage capacitor supplies power to a storage chip through an energy control unit and an isolation circuit in sequence to complete power-down protection; when the physical self-destruction signal is triggered, the energy control unit interrupts power supply to the storage chip; and meanwhile, the energy storage capacitor supplies power to the physical self-destruction circuit, and the physical self-destruction operation is executed to the memory chip through the physical self-destruction circuit to complete the physical self-destruction. The abnormality is judged through the physical self-destruction control circuit, the physical self-destruction circuit, the energy control circuit, the energy storage capacitor and the isolation circuit, the intelligent switching can be conducted to the required working mode, the electronic disk can be subjected to current limiting output in the power failure mode to provide data protection, and in the physical self-destruction mode, large current is output instantly. The circuit is simple, the devices are few, the whole stored energy is completely independent, the host power supply is not dependent, the internal isolation processing is performed, and the reliability of the physical self-destruction process is high.)

1. A multifunctional physical self-destruction and power-down protection method for an electronic disk is characterized in that: the electronic disk system power supply unit supplies power to the energy control unit, the power is output in two paths after passing through the energy control unit, and one path of power supplies power to the storage chip after passing through the isolation circuit; the other path supplies power to the energy storage capacitor; when the electric signal is triggered, the energy storage capacitor supplies power to the storage chip through the energy control unit and the isolation circuit in sequence to finish power-down protection; when the physical self-destruction signal is triggered, the energy control unit interrupts power supply to the storage chip; and meanwhile, the energy storage capacitor supplies power to the physical self-destruction circuit, and the physical self-destruction operation is executed to the memory chip through the physical self-destruction circuit to complete the physical self-destruction.

2. The multifunctional physical self-destruction and power-down protection method of the electronic disk according to claim 1, characterized in that: the physical self-destruction operation process comprises the steps that the energy storage capacitor conducts high-voltage breakdown on the storage chip through the physical self-destruction circuit, and then ultra-large current discharges rapidly to cause permanent damage to the storage chip.

3. The multifunctional physical self-destruction and power-down protection method of the electronic disk according to claim 2, characterized in that: the voltage of the power supply unit of the electronic disk system is 5V.

4. The multifunctional physical self-destruction and power-down protection method of the electronic disk according to claim 3, characterized in that: the voltage of one path is 5V, the voltage is reduced to 3.3V by the power management module, and then the power is supplied to the storage chip by the isolation circuit; and the other path of the voltage is boosted to 28V and then supplies power to the energy storage capacitor.

5. The multifunctional physical self-destruction and power-down protection method of the electronic disk according to claim 4, characterized in that: when the energy storage capacitor supplies power to the energy control unit, 28V is pressed to 5V.

6. A multifunctional physical self-destruction and power-down protection circuit of an electronic disk comprises a power supply of an electronic disk system, a power management and storage chip; the method is characterized in that: the energy control circuit, the energy storage capacitor, the physical self-destruction control circuit, the physical self-destruction circuit and the isolation circuit; the power supply of the electronic disk system, the energy control circuit, the power management circuit, the isolation circuit and the storage chip are electrically connected in sequence; the power supply of the electronic disk system is electrically connected with the physical self-destruction control circuit; the energy self-destruction control circuit is electrically connected with the energy control circuit and the physical self-destruction circuit respectively; the energy control circuit is electrically connected with the energy storage capacitor; the energy storage capacitor is electrically connected with the storage chip through a physical self-destruction circuit.

7. The multifunctional physical self-destruction and power-down protection circuit of the electronic disk according to claim 6, wherein: and a filtering and isolating circuit is arranged between the power supply of the electronic disk system and the energy control circuit.

8. The multifunctional physical self-destruction and power-down protection circuit of the electronic disk according to claim 7, wherein: the filter isolation circuit is electrically connected with the memory chip; and an electronic disk main control circuit is arranged between the filtering isolation circuit and the memory chip.

Technical Field

The invention belongs to the technical field of electronic disks, and particularly relates to a multifunctional physical self-destruction and power-down protection method and circuit of an electronic disk.

Background

With the development of science and technology, information is important to the progress of human society, and the information will be stored in various storage media in digital form, while the mainstream storage products are updated to electronic disks (NAND FLASH storage media with various interfaces), which is especially important for the security of electronic disk data. There are two levels of security: the first level refers to data storage reliability, such as: and after abnormal power failure occurs, whether the user data can be completely protected or not. The second layer refers to data security in the electronic disk, and the internal data of the electronic disk cannot be stolen by others, and under a specific condition, the internal data of the electronic disk is physically self-destroyed.

In order to prevent the data loss or damage of the electronic disk caused by abnormal power failure, power failure energy storage requirements can be added to a whole power supply (a host power supply) in the industry, and energy storage capacitors can be added to the electronic disk separately by some manufacturers to complete abnormal processing and data storage of the electronic disk after power failure, so that the integrity of data and the electronic disk is ensured. When the product is used in an onboard environment, in order to prevent an electronic disk from falling into an adversary and causing important data theft caused by special conditions, the current practice is that a host provides a separate physical self-destruction power supply (host standby power supply), and the power supply is provided by a storage battery. The method provides physical self-destruction energy for each important module in the whole machine, and each module needs to distribute the energy of the storage battery power supply, so that the current distribution mode of each module is usually determined, and the problem that other important modules cannot complete physical self-destruction due to short circuit in the physical self-destruction process is solved. The electronic disk carries out current-limiting control on energy provided by the physical self-destruction power supply through the internal circuit to ensure that the physical self-destruction circuit can normally operate.

Disclosure of Invention

The invention aims to solve the problems and provide a multifunctional physical self-destruction and power-failure protection method and a circuit for an electronic disk, which can perform data reliability protection on abnormal power failure and can perform physical self-destruction on the electronic disk.

The invention relates to a multifunctional physical self-destruction and power-down protection method of an electronic disk.A power supply unit of an electronic disk system supplies power to an energy control unit, the power is output in two paths after passing through the energy control unit, and one path supplies power to a storage chip after passing through an isolation circuit; the other path supplies power to the energy storage capacitor; when the electric signal is triggered, the energy storage capacitor supplies power to the storage chip through the energy control unit and the isolation circuit in sequence to finish power-down protection; when the physical self-destruction signal is triggered, the energy control unit interrupts power supply to the storage chip; and meanwhile, the energy storage capacitor supplies power to the physical self-destruction circuit, and the physical self-destruction operation is executed to the memory chip through the physical self-destruction circuit to complete the physical self-destruction.

Further, the multifunctional physical self-destruction and power-down protection method of the electronic disk comprises the steps that the energy storage capacitor conducts high-voltage breakdown on the storage chip through the physical self-destruction circuit in the physical self-destruction operation process, and then ultrahigh current is rapidly discharged, so that the storage chip is permanently damaged.

Further, according to the multifunctional physical self-destruction and power failure protection method of the electronic disk, the voltage of the power supply unit of the electronic disk system is 5V.

Furthermore, the multifunctional physical self-destruction and power failure protection method of the electronic disk, disclosed by the invention, is characterized in that the electronic disk is output in two paths after passing through the energy control unit, wherein one path of voltage is 5V, is reduced to 3.3V by the power management module, and then is supplied to the storage chip by the isolation circuit; and the other path of the voltage is boosted to 28V and then supplies power to the energy storage capacitor.

Further, according to the multifunctional physical self-destruction and power failure protection method of the electronic disk, when the energy storage capacitor supplies power to the energy control unit, 28V is pressed to 5V.

The invention relates to a multifunctional physical self-destruction and power-down protection circuit of an electronic disk, which comprises a power supply of an electronic disk system, a power management and storage chip; the energy control circuit, the energy storage capacitor, the physical self-destruction control circuit, the physical self-destruction circuit and the isolation circuit; the power supply of the electronic disk system, the energy control circuit, the power management circuit, the isolation circuit and the storage chip are electrically connected in sequence; the power supply of the electronic disk system is electrically connected with the physical self-destruction control circuit; the energy self-destruction control circuit is electrically connected with the energy control circuit and the physical self-destruction circuit respectively; the energy control circuit is electrically connected with the energy storage capacitor; the energy storage capacitor is electrically connected with the storage chip through a physical self-destruction circuit. The energy control circuit is mainly used for boosting, reducing voltage and providing a path of normal power supply for a later stage; the energy storage capacitor is used for storing the boosted energy when the energy control circuit works in a boosting mode; the physical self-destruction circuit is used for realizing physical self-destruction action when controlled by the physical self-destruction control circuit; the physical self-destruction control circuit is used for receiving a physical self-destruction trigger signal, controlling the physical self-destruction circuit to complete self-destruction, and simultaneously controlling the energy control circuit to cut off the later-stage power supply to ensure that all energy of the energy storage capacitor is completely used for physical self-destruction; the isolation circuit is used for isolating the physical self-destruction power supply and the normal working power supply of the electronic disk, and the physical self-destruction effect is guaranteed.

Furthermore, in the multifunctional physical self-destruction and power-down protection circuit of the electronic disk, a filtering isolation circuit is arranged between the power supply of the electronic disk system and the energy control circuit; and the power supply for the power supply of the electronic disk system is filtered and isolated in the electronic disk.

Furthermore, in the multifunctional physical self-destruction and power failure protection circuit of the electronic disk, the filter isolation circuit is electrically connected with the memory chip; an electronic disk main control circuit is arranged between the filter isolation circuit and the storage chip; and the main control circuit of the electronic disk monitors the voltage of the power supply of the whole machine in real time.

The multifunctional physical self-destruction and power-down protection method and the circuit of the electronic disk can judge the abnormity through the physical self-destruction control circuit, the physical self-destruction circuit, the energy control circuit, the energy storage capacitor and the isolation circuit, and can be intelligently switched to a required working mode, wherein the physical self-destruction control circuit can accurately and flexibly control and switch the working mode of the energy control circuit according to the power-down or self-destruction action, so that the current-limiting output of the energy control circuit can provide data protection for the electronic disk in the power-down mode, and the instantaneous large current is output in the physical self-destruction mode. The circuit is simple, the devices are few, the whole stored energy is completely independent, the host power supply is not dependent, the internal isolation processing is performed, and the reliability of the physical self-destruction process is high.

Drawings

FIG. 1 is a schematic block diagram of a multifunctional physical self-destruction and power-down protection circuit structure of an electronic disk according to the present invention;

fig. 2 is a schematic diagram of a multifunctional physical self-destruction and power-down protection circuit of an electronic disk according to an embodiment of the present invention.

Detailed Description

The multifunctional physical self-destruction and power-down protection method and circuit of the electronic disk of the invention are explained in detail by the attached drawings and the embodiments.