on a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which provides . timer/counters, a five vector two-level interrupt architecture, a full duplex. Microcontroller Architecture. The Microcontroller is one of the basic type of microcontroller, designed by Intel in ‘s. The 89C block diagram is almost a subset of 89C51 block diagram, with slight modifications. ARCHITECTURAL OVERVIEW OF ATMEL 89C51 AND.

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Hi Moses, Really thanks for your Appreciation. Pin Name Alternative Function P3. How can we use Microcontroller to detect millivolts?

Architecture 8051 Microcontroller and Block Diagram with Applicarions

Leave a Reply Cancel reply You must be logged in to post a comment. The list of projects is listed below. The output pulses of oscillator are stable.

It might not give you the complete picture of all the functionalities at first, but it is a great place to start from. This Blog is made for beginners who wants to learn based Micro Controller.

View my complete profile. Let us have a look at each part or block of this Architecture of microcontroller. Your email address will not be published. When the program starts to run, the pin is activated twice in each machine cycle.

Learn For Beginners. TMOD is an 8-bit register in which the lower 4 bits are set aside for timer 0 and the upper 4 bits are set aside for timer 1. Since the 89C51 archutecture an 8-bit architecture, each bit timer is accessed as two separate registers of low byte and high arcyitecture. This program tells microcontroller to do specific tasks. As we know that the CPU is the brain of any processing device of the microcontroller. The feature of Interrupt is very useful as it helps in case of emergency operations.


Normally, this microcontroller was developed using NMOS technology, which requires more power to operate. AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. For normal operation, RST is low. The accumulator, register A, is used for all arithmetic and logic instructions. Choosing Battery for Robots. Similarly, once you start getting acquainted with more microcontrollers, you will be able to predict the internal architecture to some extent by just looking at the pin configuration.

All the registers of 89C51 are. Some of microcontroller devices are used in measurement applications. One side of each capacitor is connected to the ground as shown in this figure; EA; The family members, such as the89C51, or DS If we wish to access on-chip program memory, then it should be connected to Vcc. He has 8 years of experience in Architdcture Support, Operations and Administration.

Learn (For Beginners): AT89C51 Description

Back to course homepage. Some baud rates are shown below: And once again, please visit our domestic website http: Posted by Fani at 4: Write to external data memory. An Interrupts gives us a mechanism to put on hold the ongoing operations, execute a subroutine and then again resumes to another type of operations. The vast majority of 89C51 registers are 8-bit registers. When if are working with microcontrollers, you are essentially going to interact with only the pins, on a physical level.


Hi Thank you so much for your feedback And once again please visit our domestic website http: All come with on-chip ROM to store programs. The interrupt flags are cleared when the processor branches to the interrupt service routine ISR.

GND; Pin 20 is the Ground pin.

No alternate functions are as signed for Port 1 pins; thus they are used solely for interfacing to external devices. It counts up until it reaches its limit of FFH. Hi Jayant Isswani Thank you very much for telling me how much you have enjoyed reading my column And once again please visit our domestic website http: The timers are used for measurement of intervals to determine the pulse width of pulses.

Architetcure pull-up resistor is used to ensure that the pin is either low or high, this time for certain. EA stands for external access enable.

Could you pls upload them again? Must by cleared by software.