Intel 80386EX

Characteristics

• Introduced August 1994
• Variant of 80386SX intended for embedded systems
• 26-bit memory addressing for up to 64 MiB of DRAM
• 16-bit data bus, limiting performance but reducing system cost
• Static core, i.e. may run as slowly as desired, down to full halt
• On-chip peripherals:
• * clock and power management
• * timers/counters
• * watchdog timer
• * serial I/O units and parallel I/O
• * DMA
• * RAM refresh
• * JTAG test logic
• Significantly more successful than the 80376
• Used aboard several orbiting satellites and microsatellites
• Used in NASA's FlightLinux project
• Used in USRobotics Courier I modem V.everything.
• Used in Ericsson R290 satellite phone
• Used in many older Garmin GPS units, such as the GPS 48, II, III, and 12.
• Used in Akai S5000 & S6000 digital samplers.