The general architecture of 8085 microprocessor define below:
• 8-bit general purpose µp
• Capable of addressing 64 k of memory
• Has 40 pins
• Requires +5 v power supply
• Can operate with 3 MHz clock
• 8085 upward compatible
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System Bus – wires connecting memory & I/O to microprocessorAddress Bus
• Unidirectional
• Identifying peripheral or memory location
Data Bus
Memory Map and Addresses 
Organization of a Microprocessor Based SystemLet’s expand the picture a bit
Memory
• Memory stores information such as instructions a- Inside The MicroprocessorInternally,
the microprocessor is made up of 3 main units.
– The Arithmetic/Logic Unit (
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