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Difference between revisions of "nec/μcom-4"
< nec

(moving some stuff to sub-families)
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{{nec title|μCOM-4}}
 
{{nec title|μCOM-4}}
 
{{ic family
 
{{ic family
 +
| extended family  = yes
 
| title            = NEC μCOM-4
 
| title            = NEC μCOM-4
 
| image            = <!-- Image representation of the IC family, e.g. "MCS-4.jpg"  -->
 
| image            = <!-- Image representation of the IC family, e.g. "MCS-4.jpg"  -->
Line 6: Line 7:
 
| developer        = NEC
 
| developer        = NEC
 
| manufacturer      = NEC
 
| manufacturer      = NEC
 +
| type              = Microcontrollers
 
| production start  = October, 1977
 
| production start  = October, 1977
 
| production end    = <!-- production end date, e.g. "January 1, 1985" or "1973"    -->
 
| production end    = <!-- production end date, e.g. "January 1, 1985" or "1973"    -->
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| tech              = nMOC
 
| tech              = nMOC
 
| clock min        = 150 kHz
 
| clock min        = 150 kHz
−
| clock max        = 440 kHz
+
| clock max        = 1 mHz
 
| package          = DIP28
 
| package          = DIP28
 
| package 2        = DIP42
 
| package 2        = DIP42
 
}}
 
}}
−
The '''μCOM-4''' line is a [[microprocessor family|family]] of [[4-bit architecture|4-bit]] [[microcontroller]]s developed by [[NEC]] in the late 1970s. This family was designed to be low-cost, mass-produced, [[microcontroller]]s for [[electronic cash register|ECRs]], industrial controllers, appliance controllers, games, toys, scientific calculators, and other consumer electronics. The μCOM-4 line is based on the {{nec|μPD751}}, the first Japanese single-chip microprocessor.
+
The '''μCOM-4''' line is an [[microprocessor family|extended family]] of [[4-bit architecture|4-bit]] [[microcontroller]]s developed by [[NEC]] in the late 1970s. This family was designed to be low-cost, mass-produced, [[microcontroller]]s for [[electronic cash register|ECRs]], industrial controllers, appliance controllers, games, toys, scientific calculators, and other consumer electronics. The μCOM-4 line is based on the {{nec|μPD751}}, the first Japanese single-chip microprocessor.
  
 
==Introduction Date==
 
==Introduction Date==
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|}
 
|}
  
−
== Members ==
+
== Families ==
−
{| class="wikitable sortable"
+
The μCOM-4 was original divided into two separate domains:
−
! Product !! Part Number !! ROM !! RAM !! I/O !! Interrupts !! Instructions !! Pins
+
 
−
|-
+
===μCOM-42===
−
| {{\|μCOM-42}} || {{\|μCOM-42|μPD548}} || 1920x10 bits || 96x4 bits || 35 || 2 || 72 || 42
+
The '''{{nec|μCOM-42}}''' was specifically marketed for [[electronic cash register]]s (ECRs), [[Point of Sale]] (POS), and [[electronic scale]] applications. The μCOM-42 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.
−
|-
+
 
−
| {{\|μCOM-43}} || {{\|μCOM-42|μPD546}} || 2000x8 bits || 96x4 bits || 35 || 1 || 80 || 42
+
===μCOM-43/44/45===
−
|-
+
The '''{{nec|μCOM-43}}/{{nec|μCOM-44|44}}/{{nec|μCOM-45|45}}''' was marketed as a general-purpose microcontroller suited for a large array of low-cost consumer and industrial applications. These MCUs shared a common instruction set.
−
| {{\|μCOM-44}} || {{\|μCOM-42|μPD547}} || 1000x8 bits || 64x4 bits || 35 || 1 || 58 || 42
 
−
|-
 
−
| {{\|μCOM-45}} || {{\|μCOM-42|μPD550}} || 640x8 bits || 32x4 bits || 21 || 1 || 58 || 28
 
−
|-
 
−
| {{\|μCOM-42 Evachip}} || {{\|μCOM-42|μPD555}} || external || 96x4 bits || 36 || 2 || 72 || 64
 
−
|-
 
−
| {{\|μCOM-43 Evachip}} || {{\|μCOM-42|μPD556}} || external || 96x4 bits || 36 || 1 || 80 || 64
 
−
|}
 
  
 
== Design ==
 
== Design ==

Revision as of 20:15, 19 January 2016

NEC μCOM-4
no photo (ic).svg
Developer NEC
Manufacturer NEC
Type Microcontrollers
Production October, 1977
Architecture 4-bit
Technology nMOC
"nMOC" is not in the list (BiCMOS, CMOS, Static CMOS, Dynamic CMOS, nMOS, pMOS, Bipolar, ECL, Schottky TTL, Schottky transistor, ...) of allowed values for the "technology" property.
Clock 150 kHz-1 mHz
Package DIP28, DIP42

The μCOM-4 line is an extended family of 4-bit microcontrollers developed by NEC in the late 1970s. This family was designed to be low-cost, mass-produced, microcontrollers for ECRs, industrial controllers, appliance controllers, games, toys, scientific calculators, and other consumer electronics. The μCOM-4 line is based on the μPD751, the first Japanese single-chip microprocessor.

Introduction Date

1977 1980
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
μCOM-42 μCOM-43 μCOM-44 μCOM-45 μCOM-75

Families

The μCOM-4 was original divided into two separate domains:

μCOM-42

The μCOM-42 was specifically marketed for electronic cash registers (ECRs), Point of Sale (POS), and electronic scale applications. The μCOM-42 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.

μCOM-43/44/45

The μCOM-43/44/45 was marketed as a general-purpose microcontroller suited for a large array of low-cost consumer and industrial applications. These MCUs shared a common instruction set.

Design

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Instruction set

Main article: μCOM-4 ISA

The family was originally split into two sets of ISAs. The μCOM-42 had an instruction set specifically designed to facilitate its use in Electronic Cash Register (ECR) and Scale products. The μCOM-43/4/5 were designed to be general purpose microcontrollers.

See also


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Warning: Default sort key "μCOM-4" overrides earlier default sort key "μCOM-4, NEC".

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Facts about "μCOM-4 - NEC"
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designerNEC +
full page namenec/μcom-4 +
instance ofmicrocontroller extended family +
main designerNEC +
manufacturerNEC +
nameNEC μCOM-4 +
packageDIP28 + and DIP42 +
technologypMOS + and CMOS +
word size4 bit (0.5 octets, 1 nibbles) +