To save pins on the physical chip, Intel multiplexed the lower 8 bits of the address bus with the 8-bit data bus. Pins 12 to 19 (
(Read): Indicates that the selected memory or I/O device is to be read. WR¯modified cap W cap R with bar above
Instructions that alter the normal program flow conditionally or unconditionally (e.g., JMP , JC , JZ , CALL , RET ).
Manage system operations and interrupt statuses (e.g., NOP , HLT , EI , DI ). Module 4: Timing Diagrams and Machine Cycles Slide 8: Understanding Machine Cycles microprocessor 8085 ppt by gaonkar free
: Differentiates between I/O operations (High) and memory operations (Low). S0cap S sub 0 S1cap S sub 1
The CPU reads the instruction opcode from memory.
The internal architecture of the 8085 consists of five primary functional units: To save pins on the physical chip, Intel
Microprocessor 8085 PPT by Gaonkar Free: Ultimate Study Guide
Microprocessor Architecture, Programming, and Applications with the 8085
The Intel 8085 is an 8-bit microprocessor that revolutionized the world of embedded systems. Known for its simplicity and robustness, it is still widely used as an educational tool to understand microprocessor architecture, instruction sets, and assembly language programming. Manage system operations and interrupt statuses (e
The 8085 contains six 8-bit general-purpose registers: . They can be used individually or paired together ( BC, DE, HL ) to function as 16-bit registers. The HL pair acts as a memory pointer in many operations. The Accumulator (A Register)
Categorizing the entire 246-opcode language structure into functional buckets.
terminals connected to a crystal oscillator to drive the internal clock. Module 3: Instruction Set and Programming Techniques
Interrupts allow external hardware components to pause the current program execution and request immediate service via an Interrupt Service Routine (ISR). Classification of Interrupts
A primary 8-bit register used to store data during ALU operations and receive the final results. General-Purpose Registers: Six 8-bit registers (
