µPD31172
Related Documents: VRC4172 User’s Manual (U14386E)
VR4121 User’s Manual (U13569E)
VR4121 Data Sheet (U14691E)
Reference Materials:
Electrical Characteristics for Microcomputer (IEI-601)
The related documents indicated in this publication may include preliminary versions. However, preliminary
versions are not marked as such.
VR4121 and VRC4172 are trademarks of NEC Corporation.
Windows is either a registered trademark or trademark of Microsoft Corporation in the United States
and/or other countries.
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• Descriptions of circuits, software, and other related information in this document are provided for illustrative
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before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically designed
for life support)
Specific: Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact an NEC sales representative in advance.
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