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

Instead the new AT89S51 is recommended for new applications. Arduino based GPS receiver. TL — Programmable Reference Voltage. This high-density System-in-Package SiP integrates controller, power switches, and support components.

Interface GPS with Arduino. When 1s are written to these port pins, they are pulled high by the internal pull-ups and can be used as inputs.

But, since the AT89C51 has a strong community support if your motive is to learn embedded then AT89C51 can still be a good choice. The AT89C51 is microcontroller longer in production and Atmel does not support new design. SPI Module microcintroller Arduino. It works with the popular architecture and hence is used by most beginners till date.


Port P 0 and P 2 are also used to provide low byte and high byte addresses, respectively, when connected to an external memory.

Search Results for AT89C51 : 26 documents found

Atmel microcontroller can be programmed with different software’s that is available in the market. Microcojtroller to external data memory.

Each MCU has its own advantage and disadvantage. Supply voltage; 5V up to 6.

Except P 0 which needs external pull-ups, rest of the ports have internal pull-ups. Read from external data memory. Programming enable voltage; 12V during Flash programming. Reset pin; Active high. The below points are just suggestions which might help one to select a MCU.

Input receiver for serial communication. In order to program the Atmel microcontroller we will need an IDE Integrated Development Environmentwhere the programming takes place. Program pulse input during Flash programming.

AT89C51 Datasheet

High-order address bits when interfacing with external memory. Submitted by webmaster on 14 May If you are planning on serious programming and expansion with community support then Keil is recommended. The AT89C51 datasheet of the Microcontroller and more detailed Features can be found at the bottom of this page.


It can be erased and program to a maximum of times. Quartz crystal oscillator up to 24 MHz. It can be programmed to operate at different baud rates. Their collection has just piled up after Microchip mcirocontroller acquired Atmel.

It is a 40 pin IC package with 4Kb flash memory.

Output transmitter for serial communication. Low-order address bits when interfacing with external memory.

AT89C51 Microcontroller Pinout, Features & Datasheet

Also simulating you program on software before trying it on hardware will save a lot of time. AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. Interface SD Card with Arduino.