8255 INTRODUCTION: The 8255 is a programmable peripheral interface i.e. PPI 8255. It is a general purpose programmable parallel I/O device. It contains 3 I/O ports which…

8259A PROGRAMMABLE INTERRUPT CONTROLLER NEED FOR 8259A • 8085 Processor has only 5 hardware interrupts. • Consider an application where a number of I/O devices connected…

RAJALAKSHMI ENGINEERING COLLEGE, THANDALAM DEPARTMENT OF ECE NOTES ON LESSON FACULTY NAME: Ms.R.MEENA SUBJECT: MICROPROCESSOR AND MICROCONTROLLER UNIT I INTRODUCTION TO 8…

8259A PROGRAMMABLE INTERRUPT CONTROLLER NEED FOR 8259A • 8085 Processor has only 5 hardware interrupts. • Consider an application where a number of I/O devices connected…

Unit - I 8086- PROCESSORS COMPUTER AND ITS ORGANIZATION A Computer is a programmable machine. It responds to a specific set of instructions in a well-defined manner. It can…

JOMO KENYATTA UNIVERSITY Of AGRICULTURE AND TECHNOLOGY FACULTY OF ENGINEERING Department of Electrical and Electronics Engineering P.O.BOX 62000-00200, NAIROBI EEE 2501:…

UNIT-V INTERRUPT STRUCTURE OF 8086 While the CPU is executing a program, an interrupt breaks the normal sequence of execution of instructions, diverts its execution to some…

1. DMA Controller 8257By :Daniel Ilunga1 2. DMA Controller 8257The Intel 8257 is a 4-channel Direct Memory Access (DMA) controller. It isspecifically designed to simplify…

1. UNIT 5 – Assembly Language Programming -By Prof. K. U. Sharma 2. 8086 Input/output & 8255 PPI Contents: 1. Mapping Schemes  Memory Mapped…

Slide 1 Slide 2 PROGRAMMABLE PERIPHERAL INTERFACE -8255 Features: It is a programmable device. It has 24 I/O programmable pins.  T T L compatible.  Improved dc driving…