NEC μCOM-43SL
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

• μCOM-43
• μCOM-4
• μCOM-8

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