A microcontroller is a small computer on a single integrated circuit. In modern terminology, it is similar to, but less sophisticated than, a system on a chip (SoC); . Atmel Microcontroller Family – Product Selection Guide. Max speed depends on Vcc voltage. Frequencies and Currents listed are for. Vcc= V & T= 25c. LCD pin descriptions: The LCD discussed in this section has 14 pins. The function of each pin is given in table. Vcc, Vss, and VEE: While Vcc.

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AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family. It can be erased and program to a maximum of times. All these ports are 8-bit bi-directional ports, i. Except P 0 which needs external pull-ups, rest of the ports have internal pull-ups. When 1s are written to these port pins, they are pulled high by the internal pull-ups microcontrroller can be used as inputs. These ports are also bit addressable and so their bits can also be accessed individually.


This high-density System-in-Package SiP integrates controller, power switches, and support components.

Features of microcontroller 89c51 – Polytechnic Hub

Skip to main content. Port P 0 and P 2 are also used to provide low byte and high byte addresses, respectively, when connected to an external memory. It can be programmed to operate at different baud rates. Reset pin; Active high. Input receiver for serial communication.

Output transmitter for serial communication. Write to external data memory. Read from external data memory. Quartz crystal oscillator up to 24 MHz.

High-order address bits when interfacing with external memory. Program pulse input during Flash programming. Programming enable voltage; 12V during Flash programming.

AT89C51 Microcontroller

Low-order address bits when interfacing with external memory. Supply voltage; 5V up to 6. Interface GPS with Arduino. Interface SD Card with Arduino. SPI Microcontrollerr of Arduino.

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