Answer / Rehan Ahmad

The 8051 microcontroller consists of a CPU (central processing unit), RAM, ROM, I/O ports, timers/counters, serial communication interface, and interrupt control unit. The CPU performs instructions and manages data, while the other components provide additional functionalities such as memory storage, input/output handling, timing, and communication.

What is an interrupt service routine?

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Define the architecture of the 8085 microprocessor?

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Explain the functions of the two dma signals hold and hlda?

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Give two ways of converting a two input NAND gate to an inverter ?

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Mention interrupts pins of 8085?

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With the help of an example explain how physical address is calculated?

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How subroutine can be called from the main program and how the program returns from the subroutine?

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Explain data types used in microcontroller programming,

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What are the typical errors associated with using stack in a program?

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What is the difference between a microprocessor and a microcontroller?

1 Answers   Zensar,

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List out the features of 8051 microcontroller?

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What is the bus arbitration problem in the 8086 and how can it be resolved?

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