■ 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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