The AT89C51 is an age old 8-bit microcontroller from the Atmel family. Note: The AT89C51 datasheet of the Microcontroller and more detailed Features can be found at the bottom of this page.ĪT89S52, ATtiny45, ATMega328P, ATMega8, ATMEga32, ATtiny88
Program store enable pin, Read external program memoryĪddress Latch Enable/ Program Pulse input for flashingĪccess Enable voltage/Program enable voltageħth pin of PORT P0 or Low-order Address bit 7 of MCUĦth pin of PORT P0 or Low -order Address bit 6 of MCUĦth pin of PORT P0 or Low -order Address bit 5 of MCUĦth pin of PORT P0 or Low -order Address bit 4 of MCUģrd pin of PORT P0 or Low -order Address bit 3 of MCUĢnd pin of PORT P0 or Low -order Address bit 2 of MCUġst pin of PORT P0 or Low -order Address bit 1 of MCUĠth pin of PORT P0 or Low -order Address bit 0 of MCU 0th pin of PORT P3 or Receiver pin of Microcontrollerġst pin of PORT P3 or Transmitter pin of MicrocontrollerĢnd pin of PORT P3 or External Interrupt 0 of MCUģrd pin of PORT P3 or External Interrupt 1 of MCUĤth pin of PORT P3 or Timer 0 interrupt of MCUĥth pin of PORT P3 or Timer 1 interrupt of MCUĦth pin of PORT P3 or Write to External data memory pinħth pin of PORT P3 or Read from External data memory pinĮxternal crystal pin 2 of MicrocontrollerĮxternal crystal pin 1 of MicrocontrollerĠth pin of PORT P2 or High-order Address bit 8 of MCUġst pin of PORT P2 or High-order Address bit 9 of MCUĢnd pin of PORT P2 or High-order Address bit 10 of MCUģrd pin of PORT P2 or High-order Address bit 11 of MCUĤth pin of PORT P2 or High-order Address bit 12 of MCUĥth pin of PORT P2 or High-order Address bit 13 of MCUĦth pin of PORT P2 or High-order Address bit 14 of MCUħth pin of PORT P2 or High-order Address bit 15 of MCU
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