AT  89xxx



AT89S51 Pin Diagram












Breadboard Connections


1.       Take the breadboard and inserted the microcontroller as shown

2.       Insert the crystal on the breadboard where the pins for the crystal are indicated in the circuit diagram

3.       Insert the 22pf capacitors in BB as shown in circuit diagram

4.       Insert in BB the 1microfarad capacitor with -ve toward the reset pin and +ve to 5v supply

5.          Soooooooooo  Oooooooooon  this will be done at respective microcontroller work shop manual