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Title NEC MIPS VR4181
Version 98YL-0218C
Released 1998 Nov 1
Category:   Technical datasheet
Author NEC
File Technical datasheetDownload File

Additional InformationAdditional Information: 

The 64-bit VR4181TM (μPD30181) RISC microprocessor is an NEC VR SeriesTM device created
specifically for Windows® CE-based palm-size PC/smart phone applications. Designed using the popular
MIPS® RISC architecture and revolutionary Modular Bus Architecture (MBA), the VR4181 offers excellent
power consumption and performance in a highly integrated, low-cost system-on-a-chip (SOC).
The VR4181 microprocessor is the second NEC device to use the ultra-low-power-consuming 66-MHz
VR4110TM CPU core based on advanced 0.25-micron technology. The VR4110 CPU has an optimized
five-stage pipeline, 4-KB instruction cache, 4-KB data cache, multiply-and-accumulate (MAC) unit, and
memory management unit that enable high performance in a compact, low-cost chip.
The VR4181’s integrated peripherals include an LCD controller, CompactFlashTM interface, power
management unit, DMA unit, interrupt control unit, timers, real-time clock, one 16550-compatible serial
interface, IrDA® 1.0 interface, keyboard interface, touch-panel interface, universal serial bus (USB) functional
interface, A/D converter, and D/A converter.
The VR4181 microprocessor complies with the MIPS I, II, and III instruction set architectures (ISAs) and
MIPS16 application-specific extension (ASE). The MIPS16 ASE compliance enables the VR4181 to incorporate
16-bit-long instruction format with conventional 32-bit-long instruction support, which results in
compact code size, smaller memory foot print, and lower system cost.
The VR4181 is an excellent choice for palm-size PC designers because its high performance, compact
size, and low power consumption make it ideal for use in battery-driven, portable handheld systems.

Geographical AttributesGeographical Attributes: 
Language:   English

Datasheet AttributesDatasheet Attributes: 

Data IntegrityData integrity level determines the integrity of the published information. Final datasheets are not intended to be modified in the future, preliminary ones can be based on unofficial information or speculations, incomplete ones are also preliminary b  Final
AddedThe exact time of the datasheet addition 2005-07-21 06:14
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