Intel386 EX Embedded Microprocessor Datasheet Product Features Static Intel386 CPU Core Extended Temperature Range Low Power Consumption Integrated Memory Management Unit Operating Power Supply Virtual Memory Support EXTB: 2.7 V to 3.6 V Optional On-chip Paging EXTC: 4.5 V to 5.5 V 4 Levels of Hardware-enforced Operating Frequency Protection 20 MHz EXTB at 2.7 V to 3.6 V MMU Fully Compatible with MMUs of 25 MHz EXTB at 3.0 V to 3.6 V the 80286 and Intel386 DX Processors 25/33 MHz EXTC at 4.5 V to 5.5 V Virtual 8086 Mode Allows Execution of Transparent Power-management System 8086 Software in a Protected and Paged Architecture System Intel System Management Mode Large Uniform Address Space Architecture Extension for Truly 64 Megabyte Physical Compatible Systems 64 Terabyte Virtual Power Management Transparent to 4 Gigabyte Maximum Segment Size Operating Systems and Application On-chip Debugging Support Including Programs Breakpoint Registers Programmable Power-management Complete System Development Support Modes High Speed CHMOS Technology Powerdown Mode Two Package Types Clock Stopping at Any Time 132-pin Plastic Quad Flatpack Only 1020 A Typical CPU Sink 144-pin Thin Quad Flatpack Current Integrated Peripheral Functions Full 32-bit Internal Architecture Clock and Power Management Unit 8-, 16-, 32-bit Data Types Chip-select Unit 8 General Purpose 32-bit Registers Interrupt Control Unit Runs Intel386 Architecture Software in a Timer/Counter Unit Cost-effective 16-bit Hardware Watchdog Timer Unit Environment Asynchronous Serial I/O Unit Runs Same Applications and Operating Synchronous Serial I/O Unit Systems as the Intel386 SX and Intel386 Parallel I/O Unit DX Processors DMA and Bus Arbiter Unit Object Code Compatible with 8086, Refresh Control Unit 80186, 80286, and Intel386 Processors JTAG-compliant Test-logic Unit High-performance 16-bit Data Bus Two-clock Bus Cycles Address Pipelining Allows Use of Slower, Inexpensive Memories 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 1998Information 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 Intels 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 markedreserve orundefined 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 1-800- 548-4725 or by visiting Intel s website at