■ DESCRIPTION
The MB91610 series is a line of Fujitsu Microelectronics microcontrollers based on a 32-bit RISC CPU core that feature a variety of peripheral functions for embedded applications that demand high-performance and high-speed CPU processing.
This series is based on the FR80* family CPU and is implemented as a single chip.

■ FEATURES
• FR80 CPU
    • 32-bit RISC, load/store architecture, five-stage pipeline
    • General-purpose registers : 32-bit × 16
    • 16-bit fixed-length instructions (basic instructions) : 1 instruction per cycle
    • Instructions suitable for embedded applications
        - Memory-to-memory transfer, bit processing, barrel shift instructions, etc.
        - Instruction support for high level languages
            Function entry and exit instructions, instructions for register multi-load and multi-store
        - Bit search instruction
            “1” detection, “0” detection, transition point detection
        - Branch instructions with delay slots
            Reduced overhead when processing branches
        - Register interlock functions
            Facilitate coding in assembly language
        - Built-in multiplier/instruction-level support
            - Signed 32-bit multiplication : 5 cycles
            - Signed 16-bit multiplication : 3 cycles
        - Interrupts (save PC and PS) : 6 cycles, 16 priority levels
        - Harvard architecture allowing program access and data access to be executed simultaneously
        - Instruction prefetch function has been added with 4 word instruction queue of CPU
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