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CHAPTER 1 OVERVIEW OF THE MB91150
1.1
MB91150 Features
The MB91150 is a single-chip microcontroller with peripheral I/O resources suited for
controlling devices such as audio equipment and MD drives that require operation
with low-power consumption. The core of the MB91150 is a 32-bit RISC CPU (FR30
Series).
I MB91150 features
❍ CPU
•
32-bit RISC (FR30), load/store architecture, 5-stage pipeline
•
32-bit general-purpose register x 16
•
16-bit fixed-length instructions (basic instruction), one instruction per cycle
•
Instructions for memory-to-memory transfer, bit processing, parallel shift, etc.
The instructions are suited for embedded-type usage.
•
Instructions for entry/exit functions, multiple load/store instructions for the register contents,
instructions for high-level languages.
•
Register interlock function allowing simpler assembler code
•
Branch instruction with a delay slot allowing a decrease in overhead for branch processing
•
Built-in multiplier, supported on the instruction level
•
Signed 32-bit multiplication: 5 cycles
•
Signed 16-bit multiplication: 3 cycles
•
Interrupt (PC and PS saving): 6 cycles, 16 priority levels
❍ Bus interface
•
24-bit address output, 8-bit and 16-bit data I/O
•
Basic bus cycle: 2 clock cycles
•
Interface for supporting various memory types
•
Unused data and address pins can be used as I/O pins.
•
Support of little endian mode
❍ Internal ROM
•
MB91F155A, MB91FV150
•
FLASH product, EVA-FLASH product: 510 KB
•
MB91155
•
Mask product: 510 KB
•
MB91154
•
Mask product: 384 KB
2
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