The AT89C51 is an age-old 8-bit microcontroller in the Atmel household. It works together with the popular 8051 structure and therefore can be utilized by the majority of novices thus far. It's four ports and completely provides 32 Programmable GPIO pins. It doesn't have an inbuilt ADC module that also supports just USART communication. Even Though It can be interfaced with outside ADC IC such as the ADC084 or the ADC0808.
The AT89C51 is no more in manufacturing and Atmel doesn't support the new layout. Instead, the brand new AT89S51 is suggested for new programs. However, because the AT89C51 has strong community service in case your aim would be to learn embedded afterward AT89C51 may still be a fantastic option.
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