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This chapter describes the outline of the V
1.1 Features
The V
4181, which is a high-performance 64-/32-bit microprocessor employing the RISC (reduced instruction set
R
computer) architecture developed by MIPS
Electronics.
The V
4181 contains the V
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product-sum operation unit, and memory management unit. It also has interface units for peripheral circuits such as
LCD controller, CompactFlash controller, DMA controller, keyboard interface, serial interface, IrDA interface, touch
panel interface, real-time clock, A/D converter and D/A converter required for the battery-driven portable information
equipment. The features of the V
• Employs 0.25 µ m process
• 64-bit RISC V
4110 CPU core with pipeline clock up to 66 MHz (operation in 32-bit mode is available)
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• Optimized 5-stage pipeline
• On-chip instruction and data caches with 4 KB each in size
• Write-back cache for reducing store operation that use the system bus
• 32-bit physical address space and 40-bit virtual address space, and 32 double-entry TLB
• Instruction set: MIPS III (with the FPU, LL and SC instructions left out) and MIPS16
• Supports MADD16 and DMADD16 instructions for executing a multiply-and-accumulate operation of 16-bit data
x 16-bit data + 64-bit data within one clock cycle
• Effective power management features, which include four operating modes, Fullspeed, Standby, Suspend and
Hibernate mode
• On-chip PLL and clock generator
• DRAM interface supporting 16-bit width SDRAM and EDO DRAM
• Ordinary ROM/PageROM/flash memory interface
• UMA based LCD controller
• 4-channel DMA controller
• RTC unit including 3-channel timers and counters
• Two UART-compatible serial interfaces and one clocked serial interface
• IrDA (SIR) interface
• Keyboard scan interface supporting 8 x 8 key matrix
• X-Y auto-scan touch panel interface
• CompactFlash interface compatible with ExCA
• A/D and D/A converters
• Includes ISA-subset bus
• Supply voltage: 2.5 V for CPU core, 3.3 V for I/O
• Package: 160-pin LQFP
CHAPTER 1 INTRODUCTION
4181 ( µ PD30181), which is a 64-/32-bit microprocessor.
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TM
, is one of the V
TM
4110
CPU core of ultra-low-power consumption with cache memory, high-speed
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4181 are described below.
R
User's Manual U14272EJ3V0UM
-Series microprocessor products manufactured by NEC
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