Atmel AT91SAM9 Microcontrollers (MCUs) constitute a broad range of ARM9-based devices. The AT91SAM9260 MCU shares the same programming model as ARM7-based controllers, allowing direct migration between controllers based on different ARM cores. The Atmel AT91SAM9261 is an ultra low-power, deterministic MCU based on the ARM926EJ-S processor, with 16K byte instruction and 16K byte data cache memories. Atmel AT91SAM9XE Flash MCUs combine a 200-MIPS ARM926EJ-S processor core with up to 256K bytes of high-performance on-chip Flash.