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	1.0 MHz-6.0 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.

Members

Family Members
Part	ROM	RAM	I/O Ports	Instructions	Notes
MB8851	2K x 8 bit	128 x 4-bit	37	70
MB8852	2K x 8 bit	128 x 4 bit	25	69
MB8853	1K x 8 bit	64 x 4 bit	37	70
MB8854	1K x 8 bit	64 x 4 bit	25	69
MB8855	2K x 8 bit	128 x 4-bit	37	70
MB8856	2K x 8 bit	128 x 4-bit	25	69
MB8857	1K x 8 bit	64 x 4 bit	37	70
MB8858	1K x 8 bit	64 x 4 bit	25	69

ISA

Main article: MB8850 ISA

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

Documents

• MB8850 Datasheet

See also

• MB88500, a higher frequency version
• MB8840, a NMOS version