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The Intel 80386EX (386EX) is a variant of the Intel 386 microprocessor designed for embedded systems. Introduced in August 1994 and was successful in the market being used aboard several orbiting satellites and microsatellites.

Characteristics

* Introduced August 1994
* Variant of 80386SX intended for embedded systems
* 26-bit memory addressing for up to 64mb of DRAM
* Static core, i.e. may run as slowly (and thus, power efficiently) as desired, down to full halt
* On-chip peripherals:
o clock and power mgmt
o timers/counters
o watchdog timer
o serial I/O units (sync and async) and parallel I/O
o DMA
o RAM refresh
o JTAG test logic
* Significantly more successful than the 80376
* Used aboard several orbiting satellites and microsatellites
* Used in NASA's FlightLinux project