Invalid Block Management Algorithm of Flash Based on CAM
Zhonghui Wei · Jisuanji gongcheng · 2009
Based on the structure of the invalid NAND flash,the classified invalid block management algorithm is proposed.The invalid block management strategy is put forward respectively correspond to the erasing,writing and reading operation of the flash.When writing data to the flash,the written data stored into the NAND flash is simultaneously backup by the external SRAM to prevent data storage error.Experiment which is based on FPGA platform indicates the algorithm can quickly identify the new increased invalid blocks and the consecutive invalid blocks.The written data can be backup.