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80386EX Datasheet

  • 80386EX

  • Intel386 EX Embedded Microprocessor

  • 56頁

  • INTEL   INTEL

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Intel386鈩?EX Embedded
Microprocessor
Datasheet
Product Features
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Static Intel386鈩?CPU Core
鈥?Low Power Consumption
鈥?Operating Power Supply
EXTB: 2.7 V to 3.6 V
EXTC: 4.5 V to 5.5 V
鈥?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
鈥?Intel System Management Mode
Architecture Extension for Truly
Compatible Systems
鈥?Power Management Transparent to
Operating Systems and Application
Programs
鈥?Programmable Power-management
Modes
Powerdown Mode
鈥?Clock Stopping at Any Time
鈥?Only 10鈥?0 碌A(chǔ) Typical CPU Sink
Current
Full 32-bit Internal Architecture
鈥?8-, 16-, 32-bit Data Types
鈥?8 General Purpose 32-bit Registers
Runs Intel386 Architecture Software in a
Cost-effective 16-bit Hardware
Environment
鈥?Runs Same Applications and Operating
Systems as the Intel386 SX and Intel386
DX Processors
鈥?Object Code Compatible with 8086,
80186, 80286, and Intel386 Processors
High-performance 16-bit Data Bus
鈥?Two-clock Bus Cycles
鈥?Address Pipelining Allows Use of
Slower, Inexpensive Memories
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Extended Temperature Range
Integrated Memory Management Unit
鈥?Virtual Memory Support
鈥?Optional On-chip Paging
鈥?4 Levels of Hardware-enforced
Protection
鈥?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
鈥?64 Megabyte Physical
鈥?64 Terabyte Virtual
鈥?4 Gigabyte Maximum Segment Size
On-chip Debugging Support Including
Breakpoint Registers
Complete System Development Support
High Speed CHMOS Technology
Two Package Types
鈥?132-pin Plastic Quad Flatpack
鈥?144-pin Thin Quad Flatpack
Integrated Peripheral Functions
鈥?Clock and Power Management Unit
鈥?Chip-select Unit
鈥?Interrupt Control Unit
鈥?Timer/Counter Unit
鈥?Watchdog Timer Unit
鈥?Asynchronous Serial I/O Unit
鈥?Synchronous Serial I/O Unit
鈥?Parallel I/O Unit
鈥?DMA and Bus Arbiter Unit
鈥?Refresh Control Unit
鈥?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

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