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CHAPTER 1 OVERVIEW OF MB90480/485 SERIES
1.1
Features of MB90480/485 Series
MB90480/485 series is a 16-bit microcontroller designed for applications such as
consumer devices requiring high-speed real-time processing.
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MB90480/485 series features
The MB90480/485 series has the following features:
❍ Minimum instruction execution time
40.0 ns/6.25 MHz oscillation multiplied by 4 (25 MHz/3.3 V ± 0.3 V for internal operation)
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62.5 ns/4 MHz oscillation multiplied by 4 (16 MHz/3.0 V ± 0.3 V for internal operation)
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PLL clock multiply system
❍ Maximum memory space: 16 Mbytes
❍ Instruction system optimized for control applications
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Available data types: bit, byte, word, long word
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Standard addressing modes: 23 types
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Improved high-precision operation using a 32-bit accumulator
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Signed multiply and divide operations, extensive RETI instruction
❍ Instruction system supporting multitasking in high-level languages (such as C)
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Use of a system stack pointer
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Symmetry of instruction sets and barrel shift instructions
❍ Nonmultiplex bus and multiplex bus support
❍ Improved execution speed: 4-byte queue
❍ Improved interrupt function (priority is a programmable setting of up to 8 levels):
8 external interrupts
❍ Data transfer function (μDMAC): maximum of 16 channels
❍ Built-in ROM: Flash version: 192 K bytes/256 K bytes/384K bytes,
❍ Built-in RAM: Flash version: 4 K bytes/6 K bytes/10 K bytes/24K bytes,
❍ General-purpose ports: maximum of 84 ports
(Input pull-up resistor settings available: 16 ports)
(Output open-drain settings available: 16 ports)
2
Mask version: 192 K bytes/256K bytes
Mask version: 10 K bytes/16K bytes
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