高速BCH编码译码器的设计

摘要

As random errors in flash memory increase with the progress of flash manufacture process,a high-speed BCH codec to correct random errors in flash memory is designed. Experiment results show that the optimized BCH (4224,4096) codec can run at a frequency of 25 MHz,and its error correction capability increases to fifteen bits in one page (512 Byte) from normally three bits per page. The codec enhances data reliability stored in flash.%针对闪存(flash)因制造工艺的不断提高而导致其内部数据区随机错误不断增加的现象,设计并实现一种高速BCH编码译码器,通过BCH编码技术对flash中的随机错误进行纠错,以达到错误检测与纠错的目的.实验结果显示优化设计的BCH(4 224,4096)编码译码器可以工作在25 MHz的工作频率下,其单页数据(512 Byte)的纠错能力从普遍的3 bit提高到15 bit,从而提高了flash数据存储与读取的可靠性.