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| developer        = Fujitsu
 
| developer        = Fujitsu
 
| manufacturer      = Fujitsu
 
| manufacturer      = Fujitsu
−
| type              = <!-- type "microprocessors", "microcontrollers", etc..        -->
+
| type              = microcontrollers
 
| production start  = 1977
 
| production start  = 1977
 
| production end    = 1992
 
| production end    = 1992
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| isa              = MB8850
 
| isa              = MB8850
 
| word              = 4 bit
 
| word              = 4 bit
−
| proc              = <!-- process, e.g. "8 μm"                                      -->
+
| proc              =  
 
| tech              = CMOS
 
| tech              = CMOS
−
| clock min        = 1 MHz
+
| clock min        = 1.0 MHz
−
| clock max        = 6 MHz
+
| clock max        = 6.0 MHz
 
| package          = DIP42
 
| package          = DIP42
 
| package 2        = DIP28
 
| package 2        = DIP28
 
| package 3        = QFP48
 
| package 3        = QFP48
 
}}
 
}}
−
The '''MB8850/MB8850H series''' is a [[microprocessor family|family]] of {{arch|4}} [[CMOS]] [[microcontroller]]s developed by [[Fujitsu]] and introduced in 1977{{date off}}. This series is architecturally identical to the {{fujitsu|MB8840|MB8840 family}} (An [[nMOS]] version). The {{fujitsu|MB88500}} series is a high-speed version of this series.
+
The '''MB8850/MB8850H series''' is a [[microprocessor family|family]] of {{arch|4}} [[CMOS]] [[microcontroller]]s developed by [[Fujitsu]] and introduced in [[1977]]{{date off}}. This series is architecturally identical to the {{fujitsu|MB8840|MB8840 family}} (An [[nMOS]] version). The {{fujitsu|MB88500}} series is a high-speed version of this series.
  
 
== Members ==
 
== Members ==
Line 28: Line 28:
 
! Part !! ROM !! RAM !! I/O Ports !! Instructions !! Notes
 
! Part !! ROM !! RAM !! I/O Ports !! Instructions !! Notes
 
|-
 
|-
−
| {{\|MB8851}} || 2kx8 bit || 128x4-bit || 37 || 70 ||
+
| {{\|MB8851}} || 2K x 8 bit || 128 x 4-bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8852}} || 2kx8 bit || 128x4 bit || 25 || 69 ||
+
| {{\|MB8852}} || 2K x 8 bit || 128 x 4 bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8853}} || 1kx8 bit || 64x4 bit || 37 || 70 ||
+
| {{\|MB8853}} || 1K x 8 bit || 64 x 4 bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8854}} || 1kx8 bit || 64x4 bit || 25 || 69 ||
+
| {{\|MB8854}} || 1K x 8 bit || 64 x 4 bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8855}} || 2kx8 bit || 128x4-bit || 37 || 70 ||
+
| {{\|MB8855}} || 2K x 8 bit || 128 x 4-bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8856}} || 2kx8 bit || 128x4-bit || 25 || 69 ||
+
| {{\|MB8856}} || 2K x 8 bit || 128 x 4-bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8857}} || 1kx8 bit || 64x4 bit || 37 || 70 ||
+
| {{\|MB8857}} || 1K x 8 bit || 64 x 4 bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8858}} || 1kx8 bit || 64x4 bit || 25 || 69 ||  
+
| {{\|MB8858}} || 1K x 8 bit || 64 x 4 bit || 25 || 69 ||  
 
|}
 
|}
 +
 
== ISA ==
 
== ISA ==
 
{{main|fujitsu/mb8850/isa|l1=MB8850 ISA}}
 
{{main|fujitsu/mb8850/isa|l1=MB8850 ISA}}
 
The {{fujitsu|MB8840}} family and this have an identical ISA consisting for 60-70 instructions.
 
The {{fujitsu|MB8840}} family and this have an identical ISA consisting for 60-70 instructions.
−
{{expand section}}
+
 
 
== Documents ==
 
== Documents ==
−
* [[:File:MB8850 family.pdf|MB8850 Datasheet]].
+
* [[:File:MB8850 family.pdf|MB8850 Datasheet]]
 +
 
 
==See also==
 
==See also==
 +
* {{fujitsu|MB8840}}, a [[nMOS]] version
 
* {{fujitsu|MB88500}}, a higher frequency version
 
* {{fujitsu|MB88500}}, a higher frequency version
−
* {{fujitsu|MB8840}}, a [[NMOS]] version
 
−
 
  
 +
<!--
 
{{stub}}
 
{{stub}}
 
{{DEFAULTSORT:MB8850}}
 
{{DEFAULTSORT:MB8850}}
 +
[[Category:Fujitsu MB8850]] -->
 
[[Category:Fujitsu]]
 
[[Category:Fujitsu]]
 
[[Category:4-bit microprocessors]]
 
[[Category:4-bit microprocessors]]
 
[[Category:1977 microprocessors]]
 
[[Category:1977 microprocessors]]
 
[[Category:microprocessor families]]
 
[[Category:microprocessor families]]
−
[[Category:Fujitsu MB8850]]
 

Latest revision as of 06:32, 4 October 2025

MB8850/MB8850H Family
MB8855.JPG
Fujitsu MB8855 datecode 1986 week 13
Developer Fujitsu
Manufacturer Fujitsu
Type microcontrollers
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[edit]

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[edit]

Main article: MB8850 ISA

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

Documents[edit]

See also[edit]

Retrieved from "https://en.wikichip.org/w/index.php?title=fujitsu/mb8850&oldid=103762"
Facts about "MB8850 - Fujitsu"
RDF feed
designerFujitsu +
full page namefujitsu/mb8850 +
instance ofmicrocontroller family +
instruction set architectureMB8850 +
main designerFujitsu +
manufacturerFujitsu +
nameMB8850/MB8850H Family +
packageDIP42 +, DIP28 + and QFP48 +
technologyCMOS +
word size4 bit (0.5 octets, 1 nibbles) +