microcontroller tutorial on internal architecture, pin diagram with explanation, program and data memory organization and applications. Microcontroller Architecture (Block Diagram). Page Contents [hide]. 1 Block Diagram of Microcontroller. CPU; Interrupts. The Intel microcontroller is one of the most popular general purpose 5 Oscillator Circuits; 6 Internal Architecture; 7 Data and Program Memory.

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Hi Srikanta Thank you so much for your feedback.

Your email address will not be published. The timers are used for measurement of intervals to determine the pulse width of architscture. Microcontroller also requires a memory to store data or operands temporarily. When a subroutine is completed, Then the execution of main program starts.

Hi Pranav Joshi, You have to code the microcontroller to detect and measure the millivolts. Microconhroller A register works in a similar fashion to the AX register of x86 processors.

Take a look at the schematic diagram below a functional microcontroller As mentioned above, control signals are used for external memory interfacing. The applications of microcontroller involves in based projects. PORT P3 acts as a normal IO port, but Port P3 has additional functions such as, serial transmit and receive pins, 2 external interrupt pins, 2 external counter inputs, read and write pins for memory access.

Microcontroller has a 16 bit address bus.

Architecture of – Microcontroller Course

Counts the number of signals input at a constant interval to indicate the elapsed time. By default register bank 0 is selected after a system reset.


This area of memory cannot be used for data or program storage, but is instead a series of memory-mapped ports and registers.

One complete oscillation of the clock source is called a pulse.

Now lets go through pin configuration in detail. Hi mahmood jan Thank you very much for telling me how much you have enjoyed reading my column And once again, please visit our domestic website http: In some cases external clock sources are used and you can see the various connections above.

The bit addressable ares of is usually used to store bit variables. It is bit and byte accessible. The memory which is used to store the program of microcontroller is known as program memory.

Each bank has 8 registers which are designated as R0,R1…R7. It is 8 bit unit. When the limit of internal memory 4K is crossed, control will automatically move to external memory to fetch remaining instructions.

Other registers can be accessed simultaneously only by direct addressing. See, availability of various packages change from device to device. Hi Moses, Really thanks for your Appreciation.

Architecture of Microcontroller. Block Diagram and Construction of ~ Wiki For You

If there is no external memory requirement, this pin is pulled high by connecting architecfure to Vcc. Discuss briefly about the interrupts of the mc ic ? Therefore, it enables synchronized work of all parts of the Microcontroller. You may already know that has a special feature of locking the program memory internal and hence protecting against software piracy. Intel first produced a microcontroller in under the name MCSwhich was an 8 bit microcontroller.


You may buy AT89S51 — from Atmel. Then, feel free to share your ideas for getting your project solutions microcontrokler us and also other readers, by posting in the comments section below. Microcontroller has 8 bits data bus. From Wikibooks, open books for an open world. We will definitely come up with articles on microfontroller bit and 32 bit architectures. The feature of Interrupt is very useful as it helps in case of emergency operations.

The counters are divided into 8 bit registers. Block Diagram and Construction of Once locked, these bits can be unlocked only by a memory-erase operation, which in turn will erase the programs in internal memory too.

8051 Microcontroller Architecture (Block Diagram)

Now lets explain and go through each in detail. The has 4 selectable banks of 8 addressable 8-bit registers, R0 to R7. It has an internal program of 4K size and if needed an external microcontrollwr can be added by interfacing of size 60K maximum.