The S25FL256LAGNFM013 is a 256 Mb (32 MB) serial NOR flash memory using 65-nm floating gate technology. It supports SPI multi-I/O including single, dual, quad, and QPI modes, operates from 2.7 V to 3.6 V, and achieves up to 66 MBps read speed. Key features include a 256-byte page programming buffer, uniform sector/block/chip erase, advanced security with individual and region protection, and 20-year data retention.