Friday, 21 September 2012

Intel 8085 microprocessor & Architecture


  • The Intel 8085 is an 8-bit microprocessor introduced by Intel in 1977 
  • Max. CPU clock rate 3, 5 and 6 MHz 
  • The "5" in the model number came from the fact that the 8085 requires only a +5-volt (V) power supply 
  • The 8085 is a conventional von Neumann design based on the Intel 8080 
  • It has 8-bit data bus & 16-bit address bus 
  • The 8-bit data bus was instead multiplexed with the lower part of the 16-bit address bus to limit the number of pins to 40 
  • The 8085 has extensions to support new interrupts, with three maskable interrupts (RST 7.5, RST 6.5 and RST 5.5) 



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