MB91F127 Overview
This model, designed on the basis of 32-bit RISC CPU (FR30 series), is a standard single-chip micro controller with built-in I/O resources and bus control functions. The functions are suitable for built-in control that requires high-speed CPU processing. MB91F127 includes 256 Kbytes built-in flash memory and 14 Kbytes built-in RAM.
MB91F127 Key Features
- 32-bit RISC (FR30), load/store architecture, 5-step pipeline
- Operating frequency : Internal 25 MHz
- General register : 32bit x 16 registers
- 16-bit fixed-length instructions (primitives), 1 instruction/1 cycle
- Instructions of memory-to-memory transfer, bit processing, and barrel shift : Instructions suitable for built-in control
- Function entry/exit instructions, multi load/store instruction for register data : High-level language patible instructi
- Register interlock functions : Simple description of assembler language
- Branch instructions with delay slot : Reduced overhead on branching process
- Built-in multiplier/ Supporting at instruction level Signed 32-bit multiplying : 5 cycles Signed 16-bit multiplying : 3
- Interrupt (saving PC and PS) : 6 cycles, 16 priority levels