The ALU performs all numerical and logical operations. These include addition, subtraction, AND, OR, and XOR. It uses data from the Accumulator and temporary registers to generate results.
The 8085 features five hardware interrupts, ranked by priority: TRAP (Highest priority, non-maskable) INTR (Lowest priority) Instruction Set and Addressing Modes
RD and WR: Active low signals for reading and writing operations. microprocessor 8085 ppt by gaonkar
These move data between registers or between memory and registers. Example: MOV A, B (Move content of B to A). Arithmetic and Logical Instructions Used for calculations and bitwise manipulation.
Accumulator (A): An 8-bit register that is part of every ALU operation. The ALU performs all numerical and logical operations
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Example: ADD B (Add B to Accumulator), ANA C (Logical AND C with Accumulator). Branching Instructions These alter the flow of the program. Example: JMP 2000H (Jump to address 2000H), CALL , and RET . Interfacing and Applications The 8085 features five hardware interrupts, ranked by
The 8085 is an 8-bit general-purpose microprocessor. It is capable of addressing 64KB of memory. It features a built-in clock generator and system controller, making it more efficient than its predecessors. Key Features 8-bit data bus and 16-bit address bus. Operates on a single +5V power supply. Clock frequency of 3 MHz (8085A). 74 instruction sets with 5 addressing modes. Integrated serial I/O and interrupt control. Internal Architecture