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Flash memory controller and method generating drive currents of flash memories

A flash memory controller, driving current technology, applied in static memory, digital memory information, instruments, etc., can solve the problems of wrong judgment of read data value, prolonged rise time of data signal, etc.

Active Publication Date: 2013-06-05
SILICON MOTION TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Driven by too low drive current, the rise time of the data signal output by the flash memory is obviously extended to 4.45ns, while the amplitude is reduced to 2.8V, which easily leads to errors in the controller's judgment of the read data value

Method used

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  • Flash memory controller and method generating drive currents of flash memories
  • Flash memory controller and method generating drive currents of flash memories
  • Flash memory controller and method generating drive currents of flash memories

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Embodiment Construction

[0027] image 3 It is a schematic diagram of an electronic device 300 according to the present invention. The electronic device 300 includes a controller 302 and N flash memories 331 - 33N. The controller 302 includes a plurality of chip enable pins CE 1 、CE 2 、CE 3 ,..., CE N , respectively coupled to a plurality of flash memories 331, 332, 333, . . . , 33N. In one embodiment, the controller 302 includes a processor 312 and a driving current generator 314 . A command line CMD is respectively coupled between the processor 312 and the plurality of flash memories 331, 332, 333, . . . , 33N. 1 、CMD 2 、CMD 3 ,...,CMD N , and transmit data access commands to the flash memories 331˜33N via the command lines. After the flash memories 331 - 33N execute the received data access commands, the flash memories 331 - 33N also respectively send response messages to the processor 312 via the command lines.

[0028] The driving current generator 314 generates a driving current, and ...

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Abstract

The invention provides a flash memory controller. The flash memory controller is coupled with a plurality of flash memories, and comprises a drive current generator and a processor. The drive current generator generates drive currents to drive the flash memories. The processor calculates the number of the flash memories, generates a drive current value according to the number and indicates the drive current generator to generate a drive current lager than or equal to the drive current value. The larger the number is, the higher the drive current value generated according to the number is.

Description

【Technical field】 [0001] The present invention relates to flash memory, and in particular to a controller for flash memory. 【Background technique】 [0002] Flash memory needs drive current to drive its operation. Generally speaking, the driving current of the flash memory is provided by the controller. The controller provides a fixed driving current to drive the flash memory it controls. Since the amount of data that can be stored in a single flash memory is limited, generally speaking, although there is only one controller in an electronic device, the controller may control multiple flash memories to increase the data storage capacity of the electronic device. [0003] As the data storage capacity of electronic devices increases, the number of flash memories controlled by the controller also increases. figure 1 It is a schematic diagram of the controller 102 controlling multiple flash memories. The total driving current provided by the controller 102 needs to maintain t...

Claims

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Application Information

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IPC IPC(8): G11C7/12G11C5/14
Inventor 罗峻译翁仁信
Owner SILICON MOTION TECH CORP
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