Multi-channel NANDflash controller with AES and ECC

Abstract

The invention provides a multi-channel NANDflash controller with an advanced encryption standard (AES) and an error correct code (ECC). The multi-channel NANDflash controller comprises a micro controller, an equipment controller, an equipment end direct memory access (DMA) controller, an on-chip memory, a NANDflash DMA controller, an AES unit, an AES input cache unit, an AES output cache unit, an ECC encoder, an ECC decoder, a data cache unit and a NANDflash interface control logic unit. By adopting the implementation mode with an AES circuit, an ECC circuit and the on-chip memory, the NANDflash controller has high encryption performance, and the service life of the NANDflash can be prolonged effectively.

Description

technical field [0001] The invention relates to a multi-channel NANDflash controller, in particular to a multi-channel NANDflash controller with AES and ECC functions. Background technique [0002] NANDflash has developed by leaps and bounds in recent years, from 1-bit / unit SLC technology to 2-bit / unit or even 3-bit / unit MLC technology, and the production process of NANDflash is also constantly improving. With the development of technology, the capacity of NAND flash continues to increase, and the cost per unit capacity is also greatly reduced, and the application fields of NAND flash are also increasing. [0003] Currently, NANDflash storage devices on the market have higher and higher bandwidth requirements, and NANDflash controllers generally increase the number of channels to increase bandwidth. [0004] In consideration of cost, the current 2-bit / unit and 3-bit / unit NAND flash has been widely used, but the reliability of this type of flash is relatively poor, and a pow...

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