NEC μCOM-44 Family
Developer	NEC
Manufacturer	NEC
Type	Microcontrollers
Production	August, 1977
Architecture	4-bit word, 10-bit instructions
ISA	μCOM-4
Word size	4 bit 0.5 octets 1 nibbles
Technology	pMOS
Clock	150 kHz-440 kHz
Package	DIP42

The 'μCOM-44 (or uCOM-44)' was family of general-purpose 4-bit microcontrollers, part of the μCOM-4 extended family. This family offered a subset of the full μCOM-4 ISA and was sold at a reduced price accordingly.

Microcontrollers

μCOM-44 Microcontrollers
Model	Part	Introduction	ROM	RAM	Pins
μCOM-44	μPD547	1977	1000x10 bit	64x4 bit	42
μCOM-44L	μPD547L	1978	1000x10 bit	64x4 bit	42
μCOM-44H	μPD552	1978	1000x10 bit	64x4 bit	42
μCOM-44C	μPD651	1978	1000x10 bit	64x4 bit	42

Design

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μCOM-44 Instruction Set

Main article: μCOM-4 ISA

The μCOM-44 ISA supported a strict subset of the entire μCOM-4 ISA, composed of 58 instructions.

See Also

• μCOM-4
• μCOM-8

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