PR31700 Datasheet, PDF (2/36 Pages) NXP Semiconductors – 32-bit RISC microprocessor

Philips Semiconductors
32-bit RISC microprocessor
Preliminary specification
PR31700
GENERAL DESCRIPTION
The PR31700 is a single-chip digital ASSP (Application Specific
Stand Product) used in HPCs (Handheld Personal Computers),
Palm-size PCs, Screenphones, Smartphones, and other vertical
market applications in the mobile computing and communication
markets. The PR31700 consists of system support logic, integrated
with the PR3901 Processor Core designed by Philips
Semiconductors.
FEATURES
• R3000A-based PR3901 Processor Core
– RISC architecture developed by MIPS Technologies, Inc.
– Philips has added its own multiply-add and branch-likely
instructions.
– A single-cycle multiply/accumulate module to allow integrated
DSP functions, such as a software modem for
high-performance standard data and fax protocols
– Instruction cache: 4K bytes; data cache: 1K bytes
– On-chip Translation Lookaside Buffer (TLB) with 3264-bit wide
entries, each of which maps 4KByte page Max 75MHz
operation
• Built-in peripheral circuit
– Clock generator with built-in eightfold-frequency phase-locked
loop (PLL)
– Four-stage write buffer
– A high performance and flexible Bus Interface Unit
– Multiple DMA channels
– Memory controller for DRAM, HDRAM, SDRAM, SRAM, ROM,
Flash Memory and PCMCIA
– Power management unit
– Big / Little endian
• Low power dissipation
– 3.3V operation
– Standby Current 10A(typ)
– CPU clock stop mode
– Power down modes for individual internal peripheral modules
• Plastic LQFP 208-pin package
The information contained herein is subject to change without notice.
Philips is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general
can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the
buyer, when utilizing Philips products, to observe standards of safety, and to avoid situations in which a malfunction or failure of
a Philips product could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that Philips products are used within specified operating ranges as set forth in the
most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the Philips
Semiconductor Reliability Handbook
The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by Philips for
any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Philips or others.
R3000A is a trademark of MIPS Technologies, Inc.
1998 May 13
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