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Flash memory device with abnormal power protection function

A technology of power protection and flash memory, which is applied in the field of flash memory devices, and can solve problems such as inability to access the host computer, failure of restarting the flash memory device system, etc.

Active Publication Date: 2017-11-28
INNODISK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the host computer re-powers on before the energy storage component is fully discharged, the controller of the flash memory device will continue to receive the discharge energy of the energy storage component, causing abnormalities in the flash memory device. The voltage level ignores a restart initialization command (initial command) sent by the computer host, which will cause the system restart failure of the flash memory device and make the computer host unable to access the flash memory device

Method used

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  • Flash memory device with abnormal power protection function
  • Flash memory device with abnormal power protection function
  • Flash memory device with abnormal power protection function

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Embodiment Construction

[0035] see figure 1 and figure 2 , is a circuit block schematic diagram of an embodiment of the flash memory device of the present invention and an operation schematic diagram of an embodiment of the flash memory device of the present invention. Such as figure 1 As shown, the flash memory device 30 is electrically connected to a host computer 10 , and performs data transmission with the host computer 10 via a transmission interface 101 . The transmission interface 101 is a data transmission interface conforming to USB, PCIe, SATA3 or other standards. The host computer 10 can use the transmission interface 101 to perform data access to the flash memory device 30 or to control the operation of the flash memory device 30 .

[0036] Wherein, the flash memory device 30 includes a controller 31 , a plurality of flash memories 33 , a voltage detection circuit 35 , a switch 37 and a power module 39 . The switch 37 is respectively connected to the voltage detection circuit 35 and ...

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Abstract

The invention provides a flash memory device with an abnormal power protection function. The flash memory device comprises a controller, a plurality of flash memories, a switch, a power module and a voltage detection circuit, wherein the voltage detection circuit detects system voltage and outputs an enable signal to the switch to switch on the switch when the system voltage is higher than a voltage threshold, the system voltage is supplied to the power module through the switch, the power module executes a charging procedure through the system voltage and outputs output voltage according to the system voltage, and the output voltage is taken as working voltage of the controller and the flash memories; when the system voltage is lower than the voltage threshold, the voltage detection circuit outputs a disable signal to the switch to switch off the switch, the system voltage is prohibited to be supplied to the power module, and the power module executes a discharge procedure to produce output voltage.

Description

technical field [0001] The invention relates to a flash memory device, in particular to a flash memory device with abnormal power supply protection. Background technique [0002] When the flash memory device (such as SSD, SD card, CF card, and USB flash drive) is powered on (power on), it may cause boot failure (boot fail) due to unstable power supply. Furthermore, when performing data writing operations, if there is a sudden power failure or voltage abnormality or instability, the flash memory device will fail to write data to the flash memory device due to the loss of power supply or voltage drop. resulting in data corruption. [0003] Therefore, in order to avoid power failure when the flash memory device is writing important data (eg, financial data), an energy storage component (such as a supercapacitor) that can provide backup power can be provided in the flash memory device. When a power failure occurs, the energy storage component is discharged to provide an operat...

Claims

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Application Information

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IPC IPC(8): G11C16/22G11C16/30G11C5/14
CPCG11C5/143G11C16/22G11C16/30
Inventor 高志傑蔡岳峰
Owner INNODISK CORP
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