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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 0.5 octets
1 nibbles |
Technology | pMOS |
Clock | 100 kHz-200 kHz |
Package | DIP42 |
The μCOM-42 (or uCOM-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 | ||||||||
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Model | Part | Introduction | ROM | RAM | Pins | |||
μCOM-42 | μPD548 | 1977 | 1920x10 bit | 96x4 bit | 42 | |||
μCOM-42 EVACHIP | μPD555 | 1977 | 96x4 bit | 64 |
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) + |