Microprocessor 8085 Ppt By Gaonkar Link

Weaknesses

The 16-bit address space treats peripheral I/O devices exactly like regular memory locations. Standard instructions like MOV and LDA are used.

Set if a carry is generated from bit D3 to D4 during arithmetic.

These instructions copy data from a source location to a destination location without altering the contents of the source or affecting the flag register status. microprocessor 8085 ppt by gaonkar

Interfacing with peripherals like the 8255 (PPI) or 8259 (Interrupt Controller). Visual Clarity:

The ALE signal is used to latch the lower 8 bits of the address into an external latch (like an IC 74LS373). Once latched, the

Program Counter (PC): A 16-bit register that points to the next instruction address. Weaknesses The 16-bit address space treats peripheral I/O

A 16-bit register pointing to a memory location in R/W memory called the "Stack," used for temporary data storage during subroutines. 2. Arithmetic and Logic Unit (ALU) The ALU performs execution data computing. It carries out:

A Presentation Based on the Pedagogy of Ramesh S. Gaonkar

Boolean logic, compares, shifts, and rotates (e.g., ANA , XRA , CMP , RLC ). These instructions copy data from a source location

: The 8085 is an 8-bit NMOS microprocessor with a 16-bit address bus capable of addressing 64KB of memory. Architecture Components : ALU (Arithmetic Logic Unit) : Performs 8-bit operations.

– Categorization matrix matching Gaonkar’s definitions.