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Chapter 2 MB91460 Rev.A/Rev.B Overview
1.Overview
Chapter 2 MB91460 Rev.A/Rev.B Overview
1. Overview
MB91460 is a series of standard microcontrollers containing a range of I/O peripherals and bus control
functions. MB91460 features a 32-bit RISC CPU (FR60 series) core and is suitable for embedded control
applications requiring high-performance and high-speed CPU processing. MB91460 derivatives also contain
up to 16 kByte instruction cache memory and other internal memories to improve the execution speed of the
CPU.
MB91460 Rev.B has the same features as MB91460 Rev.A and adds some additional components in order to
support infotainment applications. Which components and modules will be included in MB91460 Rev.B is not
yet decided finally. So this document gives only a proposal at this stage of development.
MB91460 Rev.B : This series is presently being specified, and not available yet.
2. Features
2.1 FR60 CPU Core
• 32-bit RISC, load/store architecture, pipeline 5 stages
• Maximum operating frequency: Core clock = 100 MHz (device dependent)
(Source oscillation= 4 MHz, multiplied by 25 (PLL clock multiplier method))
• General-purpose registers: 16 x 32 bits
• 16-bit fixed-length instruction (Base instruction)
• 32-bit linear address space: 4 Gbytes
• Instructions suitable for embedded application
• Transfer command between memories
• Bit-processing instruction
• Barrel-shift instructions
• Instructions supporting C-language
• Function's enter command /exit command
• Multi-load/store command of register contents
• Assembler statement is also easily available
Register's interlock function
• Multiplier's embedded application/command level support
• Signed 32-bit multiplication: 5 cycles
• Signed 16-bit multiplication: 3 cycles
• Interrupt (PC/PS are saved): 6 cycles (16 priority level)
• Harvard architecture enables simultaneous execution of program access and data access
• Memory protection function
• Embedded debug support
• Commands compatible with FR family
2.2 Instruction Cache
• 2 way set associative I-cache
• Up to 4 kByte integrated