This Reference Manual provides complete information for application developers on how to use the STR91xF Microcontroller memory and peripherals. The STR91xF is a family of microcontrollers with different memory sizes, packages and peripherals. For Ordering Information, Mechanical and Electrical Device Characteristics please refer to the STR91xF Preliminary Datasheet. For information on programming, erasing and protection of the internal Flash memory please refer to the STR9 Flash Programming Reference Manual For information on the ARM966E-S core, please refer to the ARM966E-S Rev. 2 Technical Reference Manual.