Site Loader

89C51 or AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family . Pdf of AT89C51 datasheet & pin diagram are also available at Engineers. Disclaimer: Whilst information is supplied in good faith, we are not liable for any errors or omissions. Please consult the relevant Atmel datasheet. E&OE. Key. 89C51/89C52/89C54/89C 80C51 8-bit microcontroller family. 4K/8K/16K/32K Flash. Product specification. Replaces Datasheets 89C51 of.

Author: Yozshucage Daikree
Country: Tajikistan
Language: English (Spanish)
Genre: Environment
Published (Last): 10 June 2004
Pages: 500
PDF File Size: 17.40 Mb
ePub File Size: 9.9 Mb
ISBN: 533-8-17311-689-5
Downloads: 2462
Price: Free* [*Free Regsitration Required]
Uploader: Moogukazahn

Partly in response to the existence of the single-chip TMS[2] Intel developed a computer system on a chip optimized for control applications, the Intelwith commercial parts first shipping in List of common microcontrollers. Changing the programming paradigm for the embedded in the IoT domain. Retrieved from ” https: Some microcontrollers use a Harvard architecture: A simulator will show the internal processor state and also that of the outputs, as well as allowing input signals to be generated.

Microcontroller – Wikipedia

Single-board microcontroller Special function register. All articles with unsourced statements Articles with unsourced statements from June Articles containing potentially dated statements from All articles containing potentially dated statements All articles with vague or ambiguous time Vague or ambiguous time from August Articles lacking in-text citations from July All articles lacking in-text citations Articles prone to spam from December Articles with Curlie links Wikipedia articles with BNF identifiers Wikipedia articles with GND identifiers Wikipedia articles with LCCN identifiers.

Interface SD Card with Arduino. The microcontroller vendors often trade operating frequencies and system design flexibility against time-to-market requirements from their customers and overall lower system cost.

  ASTM D4329 PDF

Typically these interpreters support interactive programming. Arduino based GPS receiver.

Another technique involves spending silicon gates on “shadow registers”: This page was last edited on 19 Decemberat Computer History Museum Oral History, Manufacturers have to balance the need to minimize the chip size against additional functionality.

When 1s are written to these port pins, they are pulled high by the internal pull-ups and can be used as inputs. Microcontroller at Wikipedia’s sister projects. The microcontroller market is extremely fragmented, with numerous vendors, technologies, and markets. While on the one hand most simulators will be limited from being unable to simulate much other hardware in a system, they can exercise conditions that may otherwise be hard to reproduce at will in the physical implementation, and can be the quickest way to debug and analyze microontroller.

Single-core Multi-core Manycore Heterogeneous architecture. Interpreter firmware is also available for some microcontrollers. Views Read Edit View history.

For the erasable variants, quartz was required, instead of less expensive glass, for its transparency to ultraviolet—glass is largely opaque to UV—but the main cost differentiator was the ceramic package itself. Compilers and assemblers are used to convert both high-level and assembly language codes into a compact machine code for storage in the micro-controller’s memory. These ” mask programmed ” parts have the program laid down in the same way as the logic of the chip, at the same time.

Atmel 89C51 Microcontroller

In addition to the converters, many embedded microprocessors include a variety of timers as well. Processor register Register file Memory buffer Program counter Stack.

This allows a part to be used in a wider variety of applications than if pins had dedicated functions. Furthermore, on low pin count devices in particular, each pin may 891 to several internal peripherals, with the pin function selected by software. So the analog to digital converter is used to convert the incoming data into a form that the processor can recognize.


This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations. Embedded system Programmable logic controller.

AT89C51 Microcontroller

The first microprocessor was the 4-bit Intel released in microcontrolker, with the Intel and other more capable microprocessors becoming available over the next several years. Branch prediction Memory dependence prediction. This is the purpose of the analog-to-digital converter ADC.

Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general purpose applications consisting of various discrete chips. The decision of which peripheral to integrate is often difficult. When GPIO pins are configured to an input state, they are often used to read sensors or external signals.

Recent microcontrollers are often integrated with on-chip debug circuitry that when accessed by an in-circuit emulator ICE via JTAGallow debugging of the firmware with a debugger.

One of the most common types of timers is the programmable interval timer PIT.

Programmable memory also reduces the lead time required for deployment of a new product. Where a Harvard architecture is used, instruction words for the processor may be a different bit size than the length of internal memory and registers; for example: