■ 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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