Semiconductor & Computer Engineering
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μCOM-42 - NEC
| NEC μCOM-42 Family | |
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| 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.
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| 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.
Microprocessors
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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Facts about "μCOM-42 - NEC"
| designer | NEC + |
| full page name | nec/μcom-42 + |
| instance of | microcontroller family + |
| instruction set architecture | μCOM-42 + |
| main designer | NEC + |
| manufacturer | NEC + |
| name | NEC μCOM-42 Family + |
| package | DIP42 + |
| technology | pMOS + |
| word size | 4 bit (0.5 octets, 1 nibbles) + |