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μPD554L (μCOM-45L) - NEC
NEC μCOM-45L | |
Manufacturer | NEC |
Model Number | μCOM-45L |
Part Number | μPD554L |
Introduction | 1981 (launch) |
General information | |
Family | μCOM-45 |
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 | -8 V |
Supply VSS | 0 V |
Memory | |
RAM | 16 B 1.6e-5 MB (32x4 bit)
0.016 kB 128 b 1.6e-8 GB |
ROM | 1 kB 0.001 MB (1000x8 bit)
1,000 B 8,000 b 1.0e-6 GB |
Stack | 1 levels |
Pins | |
Pins | 28 |
I/O ports | 21 |
Packaging | |
Package | DIP28 (DIP) |
The μPD554L or μCOM-45L is a 4-bit microcontroller introduced in 1981 by NEC as part of their μCOM-45 family. This model is modified to support a lower voltage of -8V. Additionally, it's also capable of directly driving fluorescent indicator panels at -35 volts. This model replaces the older μPD550 which had a reduced amount of ROM.
Contents
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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Facts about "μPD554L (μCOM-45L) - NEC"
family | μCOM-45 + |
first launched | 1981 + |
full page name | nec/μcom-45/μpd554l + |
instance of | microcontroller + |
manufacturer | NEC + |
max operating temperature | 70 °C + |
microarchitecture | μCOM-4 + |
min operating temperature | -10 °C + |
model number | μCOM-45L + |
name | NEC μCOM-45L + |
package | DIP28 + |
part number | μPD554L + |
pin count | 28 + |
ram | 1.6e-5 MB (0.016 kB, 16 B, 128 b, 1.6e-8 GB) + |
ram breakdown | 32x4 bit + |
rom | 0.001 MB (1 kB, 1,000 B, 8,000 b, 1.0e-6 GB) + |
rom breakdown | 1000x8 bit + |
technology | pMOS + |
word size | 4 bit (0.5 octets, 1 nibbles) + |