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PUSH & POP STACK: it s part of RAM in which data will store temporary during execution of program. STACK work on last in fi...

In 8051 micro controller have in built RAM and ROM,but size of this memory is limited size of RAM is 128 byte while size of ROM is 4KB so...

Serial Interface The serial port of 8051 is full duplex, i.e., it can transmit and receive simu...

In this mode PCON (power control register).in this register two bit play important role for power control of 8051. Below show the format ...

To write data to serial port To write a byte to the serial port one must simply write the value to the SBUF (99h) SFR. if you wanted t...

Interrupt There are five interrupt sources for the 8051, which means that they can recognize 5 different events that can interrupt regu...

TIMING  If a counter is programmed to be a timer, it will count the internal clock frequency of the 8 051 oscillator divide...

Counters and Timers Many microcontroller applications require the counting of external events, such as the frequency of a pulse tr...

Branch Instructions There are two kinds of branch instructions: Unconditional jump instructions : upon their execution a jump to a new...