Microprocessor 8085 Ppt By Gaonkar New Jun 2026

: Uses five distinct modes—Immediate, Register, Direct, Indirect, and Implied.

The operand is hidden or implied directly within the command opcode.

+---+--+---+ X1 [1] ---->| |<---- [40] Vcc (+5V) X2 [2] ---->| |-----> [39] HOLD RESET OUT [3] ---->| |<---- [38] HLDA SOD [4] ---->| |<---- [37] CLK (OUT) SID [5] ---->| |<---- [36] RESET IN TRAP [6] ---->| |<---- [35] READY RST 7.5 [7] ---->| INTEL |-----> [34] IO/M RST 6.5 [8] ---->| 8085 |<---- [33] S1 RST 5.5 [9] ---->| |<---- [32] RD INTR [10] ---->| |<---- [31] WR INTA* [11] ---->| |<---- [30] ALE AD0 (LSB) [12] <--->| |-----> [29] S0 AD1 [13] <--->| |-----> [28] A15 (MSB) AD2 [14] <--->| |-----> [27] A14 AD3 [15] <--->| |-----> [26] A13 AD4 [16] <--->| |-----> [25] A12 AD5 [17] <--->| |-----> [24] A11 AD6 [18] <--->| |-----> [23] A10 AD7 [19] <--->| |-----> [22] A9 Vss [20] ---->| |-----> [21] A8 +----------+ Functional Pin Groups 1. Address and Data Buses (Pins 12-19 & 21-28)

An 8-bit register that serves as one of the primary inputs for ALU operations and holds the final result of most calculations. microprocessor 8085 ppt by gaonkar new

Hardware Interrupts Structure (Priority tables, TRAP vs. Maskable options)

The operand is hidden and structurally built directly into the instruction command itself (e.g., CMA which complements the Accumulator). 5. Timing Diagrams and Machine Cycles

Includes opcode and operand in a single byte (e.g., MOV A, B , ADD C ). Address and Data Buses (Pins 12-19 & 21-28)

The Intel 8085 is an 8-bit general-purpose microprocessor introduced in 1976. Gaonkar’s material breaks its architecture into three primary functional blocks:

Below is a breakdown of the three core units of this architecture:

They built a new PowerPoint from the ground up, guided by the "new" perspective they found in the old pages. They created slides that mimicked the clarity of Gaonkar’s illustrations—step-by-step flows of the fetch-decode-execute cycle, crisp block diagrams of the 8085 buses, and annotated code snippets for the traffic light controller example. Addressing Modes (Immediate

, with an internal clock generator (it uses an external crystal of which is divided by 2 internally).

: To save pins, the lower 8 bits of the address bus ( ) are multiplexed with the 8-bit data bus ( ), appearing as

In the fast-paced world of technology, the "newest" solution is often a fleeting trend. True understanding comes from mastering the timeless principles laid down by the pioneers—in this case, the clarity and precision of Ramesh Gaonkar’s work on the 8085. The "new" PPT wasn't created by fancy graphics, but by a return to fundamentals.

Addressing Modes (Immediate, Direct, Register, Register Indirect, Implicit)