S25FL128S NOR Flash Memory Devices Infineon Technologies S25FL128S FL-S NOR Flash Memory Devices are a 2.7V to 3.6V / 1.65V to 3.6V VIO Volt non-volatile memory using 65nm MIRRORBIT™ technology. Designed using the Eclipse architecture with a Page Programming Buffer, the 128-Mb S25FL128S FL-S NOR allows users to program up to 128 words (256 bytes) in one operation, resulting in faster effective programming and erase than prior generation SPI program or erase algorithms. The device connects to a host system via a Serial Peripheral Interface (SPI) and supports traditional SPI single-bit serial input and output (Single I/O or SIO), optional two-bit (Dual I/O or DIO), and four-bit (Quad I/O or QIO) serial commands.