Reset in 8051 microcontroller is an operation to reset all operation , clears register value and set to it initialize mode.
To reset microcontroller RESET (Pin No: 9) must be active high at least two machine cycle.
The 8051 microcontroller has on chip oscillator circuits, which act as clock generating source for it. The output pulses of oscillator circuits are stable . So, it can be used to synchronize the operation of all circuit block inside the microcontroller and external circuits.
Clock cycle and machine cycle in microcontroller Read More »
The pin diagram of 8051 microcontroller gives information about input and output ports, interrupts, serial ports etc. about microcontroller. So, it will be useful to configure it perfectly in any kind of circuit to be build. The 8051 microcontroller has 40 pin to communicate with external machines and interfaces. Each pin has its unique functions.
This 8051 micro controller is designed by intel company in 1980. It designed in based of Harvard architecture used in embedded system. The 8051 micro controller block diagram is shown below. This divided into various parts as various parts. Let us study in details.
