The AT91SAM7L128 is a member of a series of high-performance, ultra-low power ARM7TDMI-based Processor.   The ARM7TDMI RISC processor based on ARMv4T Von Neumann Architecture,  runs at up to 36 MHz, providing 0.9 MIPS/MHz. Two instruction sets: ARM high-performance 32-bit instruction set and Thumb high code density 16-bit instruction set. Three-stage pipeline architecture: 1. Instruction Fetch (F), 2. Instruction Decode (D) and 3. Execute (E).

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