GENERAL DESCRIPTION
PR31500 Processor is a single-chip, low-cost, integrated embedded processor consisting of MIPS R3000 core and system support logic to interface with various types of devices.
PR31500 consists of a MIPS R3000 RISC CPU with 4 KBytes of instruction cache memory and 1 KByte of data cache memory, plus integrated functions for interfacing to numerous system components and external I/O modules. The R3000 RISC CPU is also augmented with a multiply/accumulate module to allow integrated DSP functions, such as a software modem for high-performance standard data and fax protocols.

FEATURES
• 32-bit R3000 RISC static CMOS CPU
• 4 KByte instruction cache
• 1 KByte data cache
• Multiply/accumulator Instruction
• R3000A memory management unit with on-chip TLB
• Supports Big/Little Endian operating systems
• On-chip peripherals with individual power-down
    – Multi-channel DMA controller
    – Bus interface unit
    – Memory controller for ROM, Flash, RAM, DRAM, SDRAM, SRAM, and PCMCIA
    – Power management module
    – Video module
    – Real-time clock 32.760KHz reference
    – High-speed serial interface
    – Infrared module
    – Dual-UART
    – SPI bus
• 3.3V supply voltage
• 208-pin LQFP (Low profile quad flat pack)
• 40MHz operation frequency