of the AT89C51, as shown in the following table. effect if the microcontroller is in external execution mode. PSEN . as Timer 0 and Timer 1 in the AT89C AT89CPI Microchip Technology / Atmel 8-bit Microcontrollers – MCU UNSAWN WAFER 21 MIL BACKGRIND 89C51 – 24MHZ, PDIP, IND TEMP datasheet. AT89C51, AT89C51 pdf, Atmel, Download pdf datasheet. AT89CA-M, AT89CA-M AT89CA-M 8-bit Flash Microcontroller with Full Speed USB .

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AT89C51 Microcontroller

It is a 40 pin IC package with 4Kb flash memory. But, since the AT89C51 has a strong community support if your motive is to learn embedded then AT89C51 can still be a good choice. In order to program the Atmel microcontroller we will need an IDE Integrated Development Environmentwhere the programming takes place.

All these ports are 8-bit bi-directional ports, microcontdoller. AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. Also simulating you program on software before trying it on hardware will save a lot of time.

If you are planning on serious programming and expansion with community support then Keil is recommended. Atmel microcontroller can be programmed with different software’s that is available in the market.


Interface SD Card with Arduino. It can be erased and program to a maximum of times. The AT89C51 datasheet of the Microcontroller and more detailed Features can be found at the bottom of this page.

ATMEL 89C51 | AT89C51 Microcontroller Pin Diagram & Description

When 1s are written to these port pins, they are pulled high by the internal pull-ups and can be used as inputs. Choosing Motor For Robots. The below points are just suggestions which might help one to select a MCU.

Supply voltage; 5V up to 6. SPI Module of Arduino. Port P 0 and P 2 are also used to provide low byte and high byte addresses, respectively, when connected to an external memory.

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The AT89C51 is an age old 8-bit microcontroller from the Atmel family. These ports are also bit addressable and so their bits can also be accessed individually.

Programming enable voltage; 12V during Flash programming. Virgin Galactic — Commercial Space Flight. Arduino, Keil uVision are the most used platforms to name a few. TL — Programmable Reference Voltage. This high-density System-in-Package SiP integrates controller, power switches, and support components.

AT89CPC – AT89C51 Pin 24MHz 4kb 8-bit Microcontroller Technical Data

Instead the new AT89S51 is recommended for new applications. Quartz crystal oscillator up to 24 MHz. Each MCU has its own advantage and disadvantage. It can be programmed to operate at different baud rates.


The AT89C51 is no longer in production and Atmel does not support new design. Output transmitter for serial communication. Skip to main content. Write to external data memory. Program pulse input during Flash programming. Their collection has just piled up after Microchip has acquired Atmel.

Input receiver for serial communication. Read from external data memory. Low-order address bits when interfacing with external memory.

Search Results for AT89C51 : 26 documents found

Except P 0 which needs external pull-ups, rest of the ports have internal pull-ups. Submitted by webmaster on 14 May Interface GPS with Arduino.

Choosing Battery for Robots. High-order address bits when interfacing with external memory. It works with the popular architecture and hence is used by most beginners till date.

Arduino based GPS receiver.