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89C51 MICROCONTROLLER FEATURES PDF

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. In the present work, ATMEL 89C51 microcontroller is used as embedded controller. Hence it is essential to know about its architectural features pin assignments. ARCHITECTURE FEATURES OF 89C51 MICROCONTROLLER architecture and pin diagram of the microcontroller 89C51 are shown in Fig &

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AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family.

AT89C51 Microcontroller

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 and can be used as inputs. These ports are also bit addressable and so their bits can also be accessed individually.

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

ATMEL 89C51 | AT89C51 Microcontroller Pin Diagram & Description

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. Low-order address bits when interfacing with external memory. Supply voltage; 5V up to 6.

microconfroller

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