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.

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Manufacturers have to balance the need to minimize the chip size against additional functionality.

ATMEL 89C51 | AT89C51 Microcontroller Pin Diagram & Description

If there are more processor registersthis saving and restoring process takes more time, increasing the latency. Here’s What It’s For. Nowadays microcontrollers are cheap and readily available for hobbyists, with large online communities around certain processors.

In contrast to general-purpose computers, microcontrollers used in embedded systems often seek to optimize interrupt latency over instruction throughput. One or more duplicate registers used only by the interrupt software, perhaps supporting a dedicated stack.

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. When certain events occur, an interrupt system can signal the processor to suspend processing the current instruction sequence and to begin an interrupt service routine ISR, or “interrupt handler” which will perform any processing required based on the source of the interrupt, before returning to the original instruction sequence.


Once it reaches zero, it sends an interrupt to the processor indicating that it microcontrollet finished counting. Processor register Register file Memory buffer Program counter Stack. The decision of which peripheral to integrate is often difficult.

Atmel 89C51 Microcontroller

Arduino based GPS receiver. One microcontriller credits TI engineers Gary Boone and Michael Cochran with the successful creation of the first microcontroller in Changing the programming paradigm for the embedded in the IoT domain. Other designs are purpose built for control applications. Virgin Galactic — Commercial Space Flight.

Please help to improve this article by introducing more precise citations. Some microcontrollers have environments to aid developing certain types of applications. The bit MCU market is expected to grow rapidly due to increasing demand for higher levels of precision in embedded-processing systems and the growth in connectivity using the Internet.

What is Web Browser. Retrieved September 16, As of [update]there are several dozen microcontroller architectures and vendors including:.


Interface GPS with Arduino. They can also be found in many electrical devices such as washing machines, microwave ovens, and telephones.

A microcontroller can be considered a self-contained system with a processor, memory and peripherals and can be used as an embedded system. This is the purpose of the analog-to-digital converter ADC.


Data dependency Structural Control False sharing. Input receiver for serial communication.

Buy online Atmel 89C51 Microcontroller India – Robomart

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 problems. In modern terminology, it is similar to, but less sophisticated than, a system on a chip Daatasheet ; an SoC may include a microcontroller as one of its components.

These ports are also bit addressable and so their bits can also be accessed individually. Even if the cost of a CPU that has integrated peripherals is slightly more than the cost of a CPU and external peripherals, having fewer chips typically allows a smaller and cheaper circuit board, and reduces the labor required to assemble and test the circuit board, in addition to tending to decrease the defect rate for the finished assembly.

By using this site, you 89551 to the Terms of Use and Privacy Policy. Typically these interpreters support interactive programming. Single-board microcontroller Special function register.