S28HS256TGZBHB813 is a 256 Mbit HS-T SEMPER™ NOR flash for automotive systems, offering an octal (JESD251) interface at 1.7 V to 2.0 V and -40°C to 105°C. It supports 166 MHz SDR and 200 MHz DDR for up to 400 MByte/s reads, with DS for timing margin. ISO 26262-compliant safety features include SECDED ECC, interface/data CRC, and SafeBoot for reliable boot code and data storage in ECUs.