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μPD552 (μCOM-44H) - NEC
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NEC μCOM-44H
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Manufacturer NEC
Model Number μCOM-44H
Part Number μPD552
Introduction 1978 (launch)
General information
Family μCOM-44
Clock 150 kHz-440 kHz
Microarchitecture
Microarchitecture μCOM-4
Technology pMOS
Word size 4 bit
0.5 octets
1 nibbles
Electrical
Op. Temp -10 °C – 70 °C
Supply VDD -10 V
Supply VSS 0 V
Memory
RAM 32 B
3.2e-5 MB
0.032 kB
256 b
3.2e-8 GB
(64x4 bit)
ROM 1.25 kB
0.00125 MB
1,250 B
10,000 b
1.25e-6 GB
(1000x10 bit)
Stack 1 levels
Pins
Pins 42
I/O ports 35
Packaging
Package DIP42 (DIP)

The μPD552 or μCOM-44H is a 4-bit microcontroller introduced in 1978 by NEC. This MPU is a high-negative version capable of being pulled to -35V in order to drive various displays directly.

Design[edit]

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Instruction Set[edit]

Main article: μCOM-4 ISA
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Documents[edit]

See also[edit]


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Facts about "μPD552 (μCOM-44H) - NEC"
RDF feed
familyμCOM-44 +
first launched1978 +
full page namenec/μcom-44/μpd552 +
instance ofmicrocontroller +
manufacturerNEC +
max operating temperature70 °C +
microarchitectureμCOM-4 +
min operating temperature-10 °C +
model numberμCOM-44H +
nameNEC μCOM-44H +
packageDIP42 +
part numberμPD552 +
pin count42 +
ram3.2e-5 MB (0.032 kB, 32 B, 256 b, 3.2e-8 GB) +
ram breakdown64x4 bit +
rom0.00125 MB (1.25 kB, 1,250 B, 10,000 b, 1.25e-6 GB) +
rom breakdown1000x10 bit +
technologypMOS +
word size4 bit (0.5 octets, 1 nibbles) +