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80386EX Dataheets PDF



Part Number 80386EX
Manufacturers Intel Corporation
Logo Intel Corporation
Description Intel386 EX Embedded Microprocessor
Datasheet 80386EX Datasheet80386EX Datasheet (PDF)

Intel386™ EX Embedded Microprocessor Datasheet Product Features s s s s s s Static Intel386™ CPU Core — Low Power Consumption — Operating Power Supply EXTB: 2.7 V to 3.6 V EXTC: 4.5 V to 5.5 V — Operating Frequency 20 MHz EXTB at 2.7 V to 3.6 V 25 MHz EXTB at 3.0 V to 3.6 V; 25/33 MHz EXTC at 4.5 V to 5.5 V Transparent Power-management System Architecture — Intel System Management Mode Architecture Extension for Truly Compatible Systems — Power Management Transparent to Operating Systems .

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Document
Intel386™ EX Embedded Microprocessor Datasheet Product Features s s s s s s Static Intel386™ CPU Core — Low Power Consumption — Operating Power Supply EXTB: 2.7 V to 3.6 V EXTC: 4.5 V to 5.5 V — Operating Frequency 20 MHz EXTB at 2.7 V to 3.6 V 25 MHz EXTB at 3.0 V to 3.6 V; 25/33 MHz EXTC at 4.5 V to 5.5 V Transparent Power-management System Architecture — Intel System Management Mode Architecture Extension for Truly Compatible Systems — Power Management Transparent to Operating Systems and Application Programs — Programmable Power-management Modes Powerdown Mode — Clock Stopping at Any Time — Only 10–20 µA Typical CPU Sink Current Full 32-bit Internal Architecture — 8-, 16-, 32-bit Data Types — 8 General Purpose 32-bit Registers Runs Intel386 Architecture Software in a Cost-effective 16-bit Hardware Environment — Runs Same Applications and Operating Systems as the Intel386 SX and Intel386 DX Processors — Object Code Compatible with 8086, 80186, 80286, and Intel386 Processors High-performance 16-bit Data Bus — Two-clock Bus Cycles — Address Pipelining Allows Use of Slower, Inexpensive Memories s s s s s s s s s Extended Temperature Range Integrated Memory Management Unit — Virtual Memory Support — Optional On-chip Paging — 4 Levels of Hardware-enforced Protection — MMU Fully Compatible with MMUs of the 80286 and Intel386 DX Processors Virtual 8086 Mode Allows Execution of 8086 Software in a Protected and Paged System Large Uniform Address Space — 64 Megabyte Physical — 64 Terabyte Virtual — 4 Gigabyte Maximum Segment Size On-chip Debugging Support Including Breakpoint Registers Complete System Development Support High Speed CHMOS Technology Two Package Types — 132-pin Plastic Quad Flatpack — 144-pin Thin Quad Flatpack Integrated Peripheral Functions — Clock and Power Management Unit — Chip-select Unit — Interrupt Control Unit — Timer/Counter Unit — Watchdog Timer Unit — Asynchronous Serial I/O Unit — Synchronous Serial I/O Unit — Parallel I/O Unit — DMA and Bus Arbiter Unit — Refresh Control Unit — JTAG-compliant Test-logic Unit This datasheet applies to devices marked EXTB and EXTC. If you require information about devices marked EXSA or EXTA, refer to a previous revision of this datasheet, order number 272420-004. Order Number: 272420-007 October 1998 Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The Intel386™ EX Microprocessor may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800548-4725 or by visiting Intel's website at http://www.intel.com. Copyright © Intel Corporation, 1998 *Third-party brands and names are the property of their respective owners. Datasheet Intel386™ EX Embedded Microprocessor Contents 1.0 2.0 3.0 4.0 Introduction .................................................................................................................. 7 Pin Assignment ........................................................................................................... 8 Pin Description .......................................................................................................... 12 Functional Description........................................................................................... 19 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 Clock Generation and Power Management Unit ................................................. 19 Chip-select Unit ................................................................................................... 19 Interrupt Control Unit ........................................................................................... 19 Timer.


EG9007D-NS 80386EX 80386DX


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