From WikiChip
μPD550L (μCOM-45L) - NEC
NEC μCOM-45L | |
![]() | |
Manufacturer | NEC |
Model Number | μCOM-45L |
Part Number | μPD550L |
Introduction | 1980 (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 | -35 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 | 640 B 6.4e-4 MB (640x8 bit)
0.64 kB 5,120 b 6.4e-7 GB |
Stack | 1 levels |
Pins | |
Pins | 28 |
I/O ports | 21 |
Packaging | |
Package | DIP28 (DIP) |
The μPD550L or μCOM-45L is a 4-bit microcontroller introduced in 1980 by NEC as part of their μCOM-45 family. This model allows the use of a single lower power supply of -8V, it's also capable of directly driving fluorescent indicator panels at -35 volts.
Contents
Design
![]() |
This section is empty; you can help add the missing info by editing this page. |
Instruction Set
- Main article: μCOM-4 ISA
![]() |
This section is empty; you can help add the missing info by editing this page. |
Documents
![]() |
This section is empty; you can help add the missing info by editing this page. |
See also
![]() |
This article is still a stub and needs your attention. You can help improve this article by editing this page and adding the missing information. |
Facts about "μPD550L (μCOM-45L) - NEC"
family | μCOM-45 + |
first launched | 1980 + |
full page name | nec/μcom-45/μpd550l + |
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 | μPD550L + |
pin count | 28 + |
ram | 1.6e-5 MB (0.016 kB, 16 B, 128 b, 1.6e-8 GB) + |
ram breakdown | 32x4 bit + |
rom | 6.4e-4 MB (0.64 kB, 640 B, 5,120 b, 6.4e-7 GB) + |
rom breakdown | 640x8 bit + |
technology | pMOS + |
word size | 4 bit (0.5 octets, 1 nibbles) + |