Skip to main content

Posts

Showing posts from July 23, 2020

Internal Architecture of Intel 8085 Micro Processor (Study Notes)

Intel 8085 Micro Processor  Intel 8085 is an  Eight bit (8 bit) NMOS  (n-type Metal Oxide Semiconductor type) Microprocessor. It has 40 Pin on chip. This package is made on a single LSI (Large Scale Integrated) chip. The Intel 8085 requires +5V Dc supply for its operation. Its clock speed is about 3MHz . The clock cycle is of 320ns. This microprocessor has 80 basic instruction and 246 Op-Codes (Operation Codes). Internal Architecture (Figure): Internal Architecture (In Detail): 1.      Arithmetic & Logic Unit (ALU) ·         ALU handles all kind of Arithmetical and Logical Operation. ·         It performs- o Addition and Subtraction  o Logic-AND, Logic-OR, Logic-XOR and Logic-NOT operation o Increment and Decrement Operations o Left Shift, Right Shift, Rotate Left, Rotate Right operation o Clear ·         ALU receives input from Accumulator and Temperary Register, and sends output to Internal Bus to store the value in different reg