BiCS FLASH memory controller wear leveling function

BiCS FLASH 3D NAND memory controllers require robust ECC functions to combat bit inversion caused by retention degradation and read disturb. Sample code demonstrates software-controlled hardware ECC engines and read retries. Additionally, dynamic wear leveling mechanisms are implemented to select blocks with the fewest P/E cycles, preventing uneven wear. Both implementations comply with the Ministry of Economy, Trade and Industry's IPA ESCR C language version 3.0, incorporating CERT C conventions and defensive programming for embedded software.