: Controlling processor state (e.g., HLT , NOP ). 🔍 Resources & Downloads
Generate a list of based on Gaonkar's book?
: Single NMOS chip with approximately 6,200 transistors.
Set to 1 if a carry is generated from bit D3 to D4 during addition. Used for Binary Coded Decimal (BCD) arithmetic. microprocessor 8085 ppt by gaonkar
Bidirectional; transfers data between the CPU and memory/IO. Multiplexing: The lower 8 bits of the address bus ( ) are multiplexed with the data bus ( ) to save pins, controlled by the ALE (Address Latch Enable) Vardhaman College of Engineering Slide 6: Addressing Modes Gaonkar classifies 8085 instructions into five modes: Immediate: Data is part of the instruction (e.g., MVI A, 05H Data is moved between registers (e.g., Address is specified in the instruction (e.g., Data is pointed to by a register pair (e.g., Implied/Implicit: The operand is hidden in the opcode (e.g., - Complement Accumulator). Slide 7: Interrupts Hardware Interrupts: Highest priority, non-maskable. RST 7.5, 6.5, 5.5: Vectored and maskable. General purpose, maskable. Software Interrupts: RST 0 through RST 7. Slide 8: Serial I/O Control Uses two dedicated pins for serial communication: SID (Serial Input Data): Read using the instruction. SOD (Serial Output Data): Set using the instruction. GeeksforGeeks UNIT I – 8085 MICROPROCESSOR
: Microprocessor vs. Microcomputer vs. Microcontroller
Executes boolean operations, compares data, or rotates bits (e.g., ANA B , XRA A , CMP M , RLC ). : Controlling processor state (e
Title Slide (Microprocessor 8085 Architecture & Programming) Slide 2: Introduction & Features (8-bit, 40-pin,
The transition from the Intel 8080 to the enhanced 8085 (the "5" signifies a single +5V power supply).
The PowerPoint presentations available online are not random; they closely follow the logical structure of Gaonkar’s "Microprocessor Architecture, Programming, and Applications with the 8085." This structure is designed for a one or two-semester undergraduate course, moving from basic concepts to advanced applications. A well-structured set of presentations based on this blueprint typically outlines a complete course, as seen in many university syllabi and shared lecture plans. Below is a common 15-week schedule derived from these PPT-based courses: Set to 1 if a carry is generated
"Notice that during T1, the address is unstable until the rising edge of ALE. The falling edge of ALE latches the address into an external latch (like the 74LS373). Without this slide's diagram, students often short-circuit the address bus to the data bus."
A 8-bit register containing 5 active flip-flops that indicate the status of the ALU after an operation:
TRAP cannot be disabled; others can be masked using SIM (Set Interrupt Mask) or enabled via EI . 7. Programming Model (Example) Goal: Load two numbers, add them, and store the result.
Eight instructions ( RST 0 through RST 7 ) that act as programmatic vector jumps. Slide 10: Interfacing and Peripheral Devices Slide Title: Peripheral Interfacing Concept Core Concepts:
; Initialize: Set up memory pointer and counter LXI H, 2000H ; HL points to the start address of the array MOV B, M ; Load array count into B DCR B ; Decrement B for loop count INX H ; HL points to the first data element MOV A, M ; Load the first data element into A LOOP: INX H ; Next element CMP M ; Compare Accumulator (A) with M JNC NEXT ; If A >= M, skip MOV A, M ; If A < M, replace A with M NEXT: DCR B ; Decrement loop counter JNZ LOOP ; If B != 0, continue checking HLT ; Stop; the largest number is now in A