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μPD557L (μCOM-43SL) - NEC
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NEC μCOM-43SL
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Manufacturer NEC
Model Number μCOM-43SL
Part Number μPD557L
Introduction 1981 (launch)
General information
Family μCOM-43
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 48 B
4.8e-5 MB
0.048 kB
384 b
4.8e-8 GB
(96x4 bit)
ROM 2 kB
0.002 MB
2,000 B
16,000 b
2.0e-6 GB
(2000x8 bit)
Stack 3 levels
Pins
Pins 42
IRQ lines 2
I/O ports 35
Packaging
Package DIP42 (DIP)

The μPD557L or μCOM-43SL is a general-purpose 4-bit microcontroller introduced in 1981 by NEC. This MCU is part of the μCOM-43 family. This model is capable of being pulled to -35V, allowing direct driving of Vacuum Fluorescent Displays.

Design

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Instruction Set

Main article: μCOM-4 ISA
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Documents

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See also


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familyμCOM-43 +
first launched1981 +
full page namenec/μcom-43/μpd557l +
instance ofmicrocontroller +
manufacturerNEC +
max operating temperature70 °C +
microarchitectureμCOM-4 +
min operating temperature-10 °C +
model numberμCOM-43SL +
nameNEC μCOM-43SL +
packageDIP42 +
part numberμPD557L +
pin count42 +
ram4.8e-5 MB (0.048 kB, 48 B, 384 b, 4.8e-8 GB) +
ram breakdown96x4 bit +
rom0.002 MB (2 kB, 2,000 B, 16,000 b, 2.0e-6 GB) +
rom breakdown2000x8 bit +
technologypMOS +
word size4 bit (0.5 octets, 1 nibbles) +