Category: 8085 Architecture

Machine Cycle in 8085 Microprocessor

Machine Cycle in 8085 Microprocessor: The seven Machine Cycle in 8085 Microprocessor are : Opcode Fetch Cycle Memory Read Memory Write I/O Read I/O Write Interrupt Acknowledge Bus Idle 1. Opcode Fetch Cycle: The first Machine Cycle of 8085 Microprocessor of every instruction is opcode fetch cycle in which the 8085 finds the nature of […]

Instruction Cycle of 8085 Microprocessor

Instruction Cycle of 8085 Microprocessor: During normal operation, the microprocessor sequentially fetches, decodes and executes one instruction after another until a halt instruction (HLT) is executed. The fetching, decoding and execution of a single instruction constitutes an instruction cycle, which consists of one to five read or write operations between processor and memory or input/output […]

8085 Pin Diagram

8085 Pin Diagram | Functional Pin Diagram of 8085 Microprocessor: Fig. 1.3 (a) and (b) shows 8085 Pin Diagram and functional pin diagram of 8085 microprocessor respectively. The signals of 8085 Pin Diagram can be classified into seven groups according to their functions. Power supply and frequency signals. Data bus and address bus Control bus […]

8085 Microprocessor Architecture and its Operations

8085 Microprocessor Architecture and its Operations: Fig. 1.1 shows the 8085 Microprocessor Architecture. It consists of various functional blocks as listed below : Registers Arithmetic and Logic Unit Instruction decoder and machine cycle encoder Address buffer Address/Data buffer Incrementer/Decrementer Address Latch Interrupt control Serial I/O control Timing and control circuitry. Registers: It has eight addressable […]

Features of 8085 Microprocessor

Features of 8085 Microprocessor: The Features of 8085 Microprocessor include : 1.It is an 8-bit microprocessor i.e. it can accept, process, or provide 8-bit data simultaneously. 2.It operates on a single +5V power supply connected at Vcc; power supply ground is connected to Vss. 3.It operates on clock cycle with 50% duty cycle. 4.It has […]

Digital Recording Definition

Digital Recording Definition: Digital Recording Definition- Digital magnetic tapes are often used as storage devices in digital data processing applications. Digital tape units are of two types, incremental and synchronous. Incremental digital recorders are commanded to step ahead (increment) for each digital character to be recorded. Input data may be at a relatively slow, or […]