Define different functional units in Intel 80386 microprocessor.

Subject Microprocessor and Assembly Language
NU Year Set: 5.(c) Marks: 4 Year: 2010

80386DX


Intel 80386DX, 25 MHz

Original version, released in October 1985.

  • Capable of working with 16- or 32-bit external buses
  • Cache: depends on mainboard
  • Package: PGA-132 or PQFP-132
  • Process: First types CHMOS III, 1.5 µm, later CHMOS IV, 1 µm
  • Die size: 104 mm² (ca. 10 mm × 10 mm) in CHMOS III and 39 mm² (6 mm × 6.5 mm) in CHMOS IV.
  • Transistor count: 275,000
  • Specified max clock: 12 MHz (early models), later 16, 20, 25 and 33 MHz
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