PR31100ABC datasheet(2/26 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

MIPS

PR31100

Highly integrated embedded processor

Version 1.2

1996 Aug 07

GENERAL DESCRIPTION

PR31100 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.

PR31100 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. PR31100 also contains multiple DMA

channels and a high-performance and flexible Bus Interface Unit

(BIU) for providing an efficient means for transferring data between

external system memory, cache memory, the CPU core, and

external I/O modules. The types of external memory devices

supported include dynamic random access memory (DRAM),

synchronous dynamic random access memory (SDRAM), static

random access memory (SRAM), Flash memory, read-only memory

(ROM), and expansion cards (PCMCIA and/or MagicCard).

PR31100 also contains a System Interface Module (SIM) containing

integrated functions for interfacing to numerous external I/O

modules such as liquid crystal displays (LCDs), the UCB1100 (which

handles most of the analog functions of the system, including sound

and telecom codecs and touchscreen ADC), ISDN/high-speed

serial, infrared, wireless peripherals, Magicbus, etc. Lastly, PR31100

contains support for implementation of power management,

whereby various PR31100 internal modules and external

subsystems can be individually (under software control) powered up

and down.

Figure 1 shows an External Block Diagram of PR31100.

FEATURES

• 32-bit R3000 RISC static CMOS CPU

• 4 KByte instruction cache

• 1 KByte data cache

• Multiply/accumulator

• 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 and/or MagicCard

– 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

ORDERING INFORMATION

PART NUMBER

TEMPERATURE RANGE (

°C) AND PACKAGE

FREQUENCY

(MHz)

DRAWING NUMBER

PR31100ABC

0 to +70, 208-pin Low Profile Quad Flat Pack

LQFP208

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