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{{fujitsu title|MB8840/MB8840H}}
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{{fujitsu title|MB8840}}
 
{{ic family
 
{{ic family
 
| title            = MB8840/MB8840H Family
 
| title            = MB8840/MB8840H Family
−
| image            = <!-- Image representation of the IC family, e.g. "MCS-4.jpg"  -->
+
| image            =  
−
| caption          = <!-- description of the image                                  -->
+
| caption          =  
 
| 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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| proc              = <!-- process, e.g. "8 μm"                                      -->
 
| proc              = <!-- process, e.g. "8 μm"                                      -->
 
| tech              = nMOS
 
| tech              = nMOS
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| clock min        = 1 MHz
+
| clock min        = 1.0 MHz
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| clock max        = 6 MHz
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| clock max        = 6.0 MHz
 
| package          = DIP42
 
| package          = DIP42
 
| package 2        = DIP28
 
| package 2        = DIP28
 
| package 3        = QFP48
 
| package 3        = QFP48
 
}}
 
}}
−
The '''MB8840/MB8840H series''' is a [[microprocessor family|family]] of {{arch|4}} [[nMOS]] [[microcontroller]]s developed by [[Fujitsu]] and introduced in 1977{{date off}}. This series was very popular for arcade games (e.g. some Atari's Namco Galaga/Xevious systems). This series is architecturally identical to the {{fujitsu|MB8850|MB8850 family}} (A [[CMOS]] version).
+
The '''MB8840/MB8840H series''' is a [[microprocessor family|family]] of {{arch|4}} [[nMOS]] [[microcontroller]]s developed by [[Fujitsu]] and introduced in [[1977]]{{date off}}. This series was very popular for arcade games (e.g. some Atari's Namco Galaga/Xevious systems). This series is architecturally identical to the {{fujitsu|MB8850|MB8850 family}} (A [[CMOS]] version).
  
 
== Members ==
 
== Members ==
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! Part !! ROM !! RAM !! I/O Ports !! Instructions !! Notes
 
! Part !! ROM !! RAM !! I/O Ports !! Instructions !! Notes
 
|-
 
|-
−
| {{\|MB8841}} || 2kx8 bit || 128x4-bit || 37 || 70 ||
+
| {{\|MB8841}} || 2K x 8 bit || 128 x 4 bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8842}} || 2kx8 bit || 128x4 bit || 25 || 69 ||
+
| {{\|MB8842}} || 2K x 8 bit || 128 x 4 bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8843}} || 1kx8 bit || 64x4 bit || 37 || 70 ||
+
| {{\|MB8843}} || 1K x 8 bit || 64 x 4 bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8844}} || 1kx8 bit || 64x4 bit || 25 || 69 ||
+
| {{\|MB8844}} || 1K x 8 bit || 64 x 4 bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8845}} || 2kx8 bit || 128x4-bit || 37 || 70 ||
+
| {{\|MB8845}} || 2K x 8 bit || 128 x 4-bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8846}} || 2kx8 bit || 128x4-bit || 25 || 69 ||
+
| {{\|MB8846}} || 2K x 8 bit || 128 x 4-bit || 25 || 69 ||
 
|-
 
|-
−
| {{\|MB8847}} || 1kx8 bit || 64x4 bit || 37 || 70 ||
+
| {{\|MB8847}} || 1K x 8 bit || 64 x 4 bit || 37 || 70 ||
 
|-
 
|-
−
| {{\|MB8848}} || 1kx8 bit || 64x4 bit || 25 || 69 ||  
+
| {{\|MB8848}} || 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 MB8840 has an identical ISA to that of the {{fujitsu|MB8850}}.
 
The MB8840 has an identical ISA to that of the {{fujitsu|MB8850}}.
 +
 
== Documents ==
 
== Documents ==
−
* [[:File:MB8840-H Series (1987).pdf|MB8840 Datasheet]].
+
* [[:File:MB8840-H Series (1987).pdf|MB8840 Datasheet]]
 +
 
 
==See also==
 
==See also==
−
* {{fujitsu|MB88500}}, a [[CMOS]] version
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* {{fujitsu|MB8850}}, a [[CMOS]] version
−
 
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* {{fujitsu|MB88500}}, a higher frequency version
  
 +
<!--
 
{{stub}}
 
{{stub}}
 
{{DEFAULTSORT:MB8840}}
 
{{DEFAULTSORT:MB8840}}
 +
[[Category:Fujitsu MB8840]] -->
 
[[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 MB8840]]
 

Latest revision as of 06:28, 4 October 2025

MB8840/MB8840H Family
no photo (ic).svg
Developer Fujitsu
Manufacturer Fujitsu
Type microcontrollers
Production 1977-1992
ISA MB8850
Word size 4 bit
0.5 octets
1 nibbles
Technology nMOS
Clock 1.0 MHz-6.0 MHz
Package DIP42, DIP28, QFP48

The MB8840/MB8840H series is a family of 4-bit nMOS microcontrollers developed by Fujitsu and introduced in 1977[off?]. This series was very popular for arcade games (e.g. some Atari's Namco Galaga/Xevious systems). This series is architecturally identical to the MB8850 family (A CMOS version).

Members[edit]

The "H" versions are identical to their non-"H" counterparts but aimed to be "high performance", capable of operating at higher frequency (up to 8 MHz).

Family Members
Part ROM RAM I/O Ports Instructions Notes
MB8841 2K x 8 bit 128 x 4 bit 37 70
MB8842 2K x 8 bit 128 x 4 bit 25 69
MB8843 1K x 8 bit 64 x 4 bit 37 70
MB8844 1K x 8 bit 64 x 4 bit 25 69
MB8845 2K x 8 bit 128 x 4-bit 37 70
MB8846 2K x 8 bit 128 x 4-bit 25 69
MB8847 1K x 8 bit 64 x 4 bit 37 70
MB8848 1K x 8 bit 64 x 4 bit 25 69

ISA[edit]

Main article: MB8850 ISA

The MB8840 has an identical ISA to that of the MB8850.

Documents[edit]

See also[edit]

Retrieved from "https://en.wikichip.org/w/index.php?title=fujitsu/mb8840&oldid=103761"
Facts about "MB8840 - Fujitsu"
RDF feed
designerFujitsu +
full page namefujitsu/mb8840 +
instance ofmicrocontroller family +
instruction set architectureMB8850 +
main designerFujitsu +
manufacturerFujitsu +
nameMB8840/MB8840H Family +
packageDIP42 +, DIP28 + and QFP48 +
technologynMOS +
word size4 bit (0.5 octets, 1 nibbles) +