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The '''μCOM-42''' was [[microprocessor family|family]] of {{arch|4}} [[microcontroller]]s, part of the {{nec|μCOM-4|μCOM-4 extended family}}, specifically marketed for electronic cash registers (ECRs), Point of Sale (POS), and electronic scale applications. These chips were specifically designed for controlling 8x4 keyboards, 8-digit displays, and various ECR-type printers. The μCOM-42 had a separate, modified instruction set, compared with the rest of the {{nec|μCOM-4}} families.
 
The '''μCOM-42''' was [[microprocessor family|family]] of {{arch|4}} [[microcontroller]]s, part of the {{nec|μCOM-4|μCOM-4 extended family}}, specifically marketed for electronic cash registers (ECRs), Point of Sale (POS), and electronic scale applications. These chips were specifically designed for controlling 8x4 keyboards, 8-digit displays, and various ECR-type printers. The μCOM-42 had a separate, modified instruction set, compared with the rest of the {{nec|μCOM-4}} families.
  
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== Microprocessors ==
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== Microcontrollers ==
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<table class="wikitable sortable">
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<tr><th colspan="9" style="background:#D6D6FF;">μCOM-42 Microcontrollers</th></tr>
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<tr><th>Model</th><th>Part</th><th>Introduction</th><th>ROM</th><th>RAM</th><th>Pins</th></tr>
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{{#ask: [[Category:microcontroller models by nec]] [[microcontroller family::μCOM-42]]
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|?full page name
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|?model number
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|?part number
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|?first launched
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|?rom breakdown
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|?ram breakdown
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|?pin count
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|format=template
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}}
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</table>
  
 
== Design ==
 
== Design ==

Revision as of 03:23, 20 January 2016

NEC μCOM-42 Family
no photo (ic).svg
Developer NEC
Manufacturer NEC
Type Microcontrollers
Production February, 1977
Architecture 4-bit word, 10-bit instructions
ISA μCOM-42
Word size 4-bit
"-bit" is not declared as a valid unit of measurement for this property.
Technology pMOS
Clock 100 kHz-200 kHz
Package DIP42

The μCOM-42 was family of 4-bit microcontrollers, part of the μCOM-4 extended family, specifically marketed for electronic cash registers (ECRs), Point of Sale (POS), and electronic scale applications. These chips were specifically designed for controlling 8x4 keyboards, 8-digit displays, and various ECR-type printers. The μCOM-42 had a separate, modified instruction set, compared with the rest of the μCOM-4 families.

Microcontrollers

μCOM-42 Microcontrollers
ModelPartIntroductionROMRAMPins
μCOM-42μPD54819771920x10 bit96x4 bit42
μCOM-42 EVACHIPμPD555197796x4 bit64

Design

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μCOM-42 Instruction Set

Main article: μCOM-42 ISA

The μCOM-42 ISA had a set of 72 instructions. Every instruction is a single 10-bit word

See Also


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designerNEC +
full page namenec/μcom-42 +
instance ofmicrocontroller family +
instruction set architectureμCOM-42 +
main designerNEC +
manufacturerNEC +
nameNEC μCOM-42 Family +
packageDIP42 +
technologypMOS +