NAND Bad Columns analysis and removal

NAND Bad Columns analysis and removal These vertical stripes are Bad Columns. Number of Bad columns within one page can be any, on practise 1…80 defects/columns (2…160 bytes per page). Typical size of bad columns is 2 bytes, rarely 1 byte, sometimes they are grouped together as 4,6 and more bytes. A distrubution of bad…

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Direct access to NAND and physical image extraction

Direct access to NAND memory and physical image extraction The Visual Nand Reconstructor supports two modes of access to memory chips: 1. Direct access to NAND memory (used for scrambler (XOR key) extraction, bit errors estimation, bad columns removal, power adjustment) 2. Physical image extraction (used for logical image reconstruction and data recovery) When new…

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