The document discusses interrupts in the 8085 microprocessor. It defines interrupts as a mechanism to suspend normal execution and service external devices or instructions. The 8085 has hardware and software interrupts. Hardware interrupts can be maskable or non-maskable. Maskable interrupts like RST 7.5, 6.5, 5.5 and INTR can be enabled and disabled, while the non-maskable TRAP interrupt cannot. Software interrupts use RST instructions to redirect execution to subroutines.
PIC A special purpose integrated circuit that function as an overall manager in an interrupt driven system.
It accepts request from the peripheral equipment,determines which of the incoming request is of the highest priority, ascertains whether the incoming request has a higher priority value than the level currently being serviced, and issues an interrupt to the CPU based on this determination.
PIC A special purpose integrated circuit that function as an overall manager in an interrupt driven system.
It accepts request from the peripheral equipment,determines which of the incoming request is of the highest priority, ascertains whether the incoming request has a higher priority value than the level currently being serviced, and issues an interrupt to the CPU based on this determination.
This presentation discusses the support for interrupts in 8051. The interrupt types, interrupts versus polling etc are discussed. The register formats of IE, IP register are discussed. The concept of priority among the interrupts is discussed.
found this one in one of my abandoned folders. AC(students from JUCSE need no introduction but for others you should never want to know him :-O) assigned this task to me and 3 of my fellow classmates to create a presentation on this uninteresting and weird topic. We pulled it off however :P
this is the brief description of the 8085 microprocessor. in this ppt, I described the key features of 8085, architecture, pin diagram, interfacing, timing diagram, some program, etc. I have also discussed the memory interfacing of 8085 microprocessor.
Semiconductor Memory Fundamentals
Memory Types
Memory Structure and its requirements
Memory Decoding
Examples
Input - Output Interfacing
Types of Parallel Data Transfer or I/O Techniques
This presentation discusses the support for interrupts in 8051. The interrupt types, interrupts versus polling etc are discussed. The register formats of IE, IP register are discussed. The concept of priority among the interrupts is discussed.
found this one in one of my abandoned folders. AC(students from JUCSE need no introduction but for others you should never want to know him :-O) assigned this task to me and 3 of my fellow classmates to create a presentation on this uninteresting and weird topic. We pulled it off however :P
this is the brief description of the 8085 microprocessor. in this ppt, I described the key features of 8085, architecture, pin diagram, interfacing, timing diagram, some program, etc. I have also discussed the memory interfacing of 8085 microprocessor.
Semiconductor Memory Fundamentals
Memory Types
Memory Structure and its requirements
Memory Decoding
Examples
Input - Output Interfacing
Types of Parallel Data Transfer or I/O Techniques
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
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Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
2. CONTENTS
Sr no contents
1 Introduction
2 classification of interrupts
3 Hardware interrupt
4 SIM Instruction
5 RIM instruction
6 Block diagram of Hardware
interrupt
7 Software interrupt
3. what is Interrupt?
Interrupt is a mechanism by which an I/O or an instruction can
suspend the normal execution of processor and get itself serviced.
Generally, a particular task is assigned to that interrupt signal. In the
microprocessor based system the interrupts are used for data transfer
between the peripheral devices and the microprocessor.
INTRODUCTION
4. After receiving an interrupt signal from the peripheral, the
microprocessor executes current instruction completely.
Store the contents of program counter i.e. return address on the stack
and then executes interrupts service (ISR) to provide service to the
interrupting device.
After servicing the device, the microprocessor transfer program
control back to the program where interrupt occurs by reloading the
content of program counter which has been stored on the stack when
an interrupt occurs.
8. Nonmaskable interrupt
The MPU is interrupted when a logic signal is applied to this
type of input.
Maskable interrupt
The MPU is interrupted ONLY if that particular input is
enabled.
It is enabled or disabled under program control.
If disabled, an interrupt signal is ignored by the MPU.
HARDWARE INTERRUPTS
9. RESPONDING TO INTERRUPTS
• Responding to an interrupt may be
immediate or delayed depending on
whether the interrupt is maskable or non-
maskable and whether interrupts are being
masked or not.
• There are two ways of redirecting the
execution to the ISR depending on
whether the interrupt is vectored or non-
vectored.
• Vectored: The address of the subroutine is
already known to the Microprocessor
• Non Vectored: The device will have to supply
the address of the subroutine to the
Microprocessor
Interrupt name Maskable Vectored
INTR Yes No
RST 5.5 Yes Yes
RST 6.5 Yes Yes
RST 7.5 Yes Yes
TRAP No Yes
11. Non-maskable interrupt :Can not be delayed or Rejected. It’s types as
follows.
TARP: a non mask able interrupt known as NMI, it has the highest priority,
it can not be enabled ; and it cannot be disable. It is edge and level triggered.
This means hat the TRAP must go high and remain high until it is
acknowledged.
Maskable interrupt : Can be delayed or Rejected and Enable Or
Disable By EI And DI Instruction. It’s types as follows.
RST 7.5: The RST 7.5 interrupt is a maskable interrupt. It has the second highest
priority. It is edge sensitive. ie. Input goes to high and no need to maintain high
state until it recognized. Enabled by EI instruction. It is disabled by,
1.DI instruction
2.System or processor reset.
3.After reorganization of interrupt.
12. RST 6.5 and 5.5: The RST 6.5 and RST 5.5 both are level triggered. ie. Input
goes to high and stay high until it recognized. Maskable interrupt. Enabled by EI
instruction. It is disabled by,
1.DI, SIM instruction
2.System or processor reset.
3.After reorganization of interrupt.
The RST 6.5 has the third priority whereas RST 5.5 has the fourth priority.
INTR: INTR is a maskable interrupt. Enabled by EI instruction. It is disabled by,
1.DI, SIM instruction
2.System or processor reset.
3.After reorganization of interrupt.
It is Non- vectored interrupt. After receiving INTA (active low) signal, it has to
supply the address of ISR. It has lowest priority. It is a level sensitive interrupts. i.e.
Input goes to high and it is necessary to maintain high state until it recognized.
After receive this interrupt µp response with INTA pulse and it’s interrupt address is
given by external circuit.
13. SIM(set interrupt mask) Instruction
This is a multipurpose instruction and used to implement The 8085
interrupts 7.5, 6.5, 5.5, and serial data output. The instruction interrupts the
accumulator contents as following:
14. RIM(Read Interrupt Mask) instruction:
This is a multi purpose instruction used to read the Status of interrupts 7.5,
6.5 ,5.5 and read serial data input bit . The instruction loads eight bits in the
accumulator with the following interpretations:
16. SOFTWARE INTERRUPT
The software interrupts are program instructions. These
instructions are inserted at desired locations in a program. The
8085 has eight software interrupts from RST 0 to RST 7. When
microprocessor is interrupt by giving instruction in the main
program. The it is called as software interrupt.
They allow the microprocessor to transfer program control from the main
program to the subroutine program. After completing the subroutine program,
the program control returns back to the main program.
We can calculate the vector address of these interrupts using the formula
given below:
Vector Address = Interrupt Number * 8
For Example:
RST2: vector address=2*8 = 16
RST1: vector address=1*8 = 08
RST3: vector address=3*8 = 24