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MB8850 - Fujitsu
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MB8850/MB8850H Family
Fujitsu MB8855 datecode 1986 week 13
Developer Fujitsu
Manufacturer Fujitsu
Production 1977-1992
ISA MB8850
Word size 4 bit
0.5 octets
1 nibbles
Technology CMOS
Clock 1 MHz-6 MHz
Package DIP42, DIP28, QFP48

The MB8850/MB8850H series is a family of 4-bit CMOS microcontrollers developed by Fujitsu and introduced in 1977[off?]. This series is architecturally identical to the MB8840 family (An nMOS version). The MB88500 series is a high-speed version of this series.


Family Members
Part ROM RAM I/O Ports Instructions Notes
MB8851 2kx8 bit 128x4-bit 37 70
MB8852 2kx8 bit 128x4 bit 25 69
MB8853 1kx8 bit 64x4 bit 37 70
MB8854 1kx8 bit 64x4 bit 25 69
MB8855 2kx8 bit 128x4-bit 37 70
MB8856 2kx8 bit 128x4-bit 25 69
MB8857 1kx8 bit 64x4 bit 37 70
MB8858 1kx8 bit 64x4 bit 25 69


Main article: MB8850 ISA

The MB8840 family and this have an identical ISA consisting for 60-70 instructions.

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See also[edit]

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Facts about "MB8850 - Fujitsu"
designerFujitsu +
full page namefujitsu/mb8850 +
instance ofintegrated circuit family +
instruction set architectureMB8850 +
main designerFujitsu +
manufacturerFujitsu +
nameMB8850/MB8850H Family +
packageDIP42 +, DIP28 + and QFP48 +
technologyCMOS +
word size4 bit (0.5 octets, 1 nibbles) +