8052 Embedded system in 2026

What is 8052 Microcontroller with Keil C code?

The Microcontroller is a single chip, it's had family such as 8031, 8051, 8052 series family. first invented by Motorola, intel introduced 8031, without memory, next they introduced 4k rom.

The microcontroller has 40-pin Dip (Dual inline Pack) left side 20-pins, right side 20-pins, 40th-pin VCC and 20th-pin GND.

Microcontroller Development Board Image-1

No need to buy 8051 Development board. You can try yourself; it's just simple way.

first step: Find the 8051 notches, then count left to bottom 20-pin and bottom to right 40-pin.

Here, have mainly crystal frequence 11.0592Mhz. if you have serial port then use baud rate purpose only crystal frequence 11.0592Mhz. if not have taken serial port, then consider the crystal frequence frequency is 12Mhz, for crystal frequence 11.0592 MHz, required two 33pf (Pico farad) one terminal to crystal frequence another terminal to gnd.

40-pin Socket with AT89S52 Image-2

Second step: 9th pin should be Reset pin to run microcontroller smooth way; we need to consider the reset switch. Here, required 8k2 resistor and 10 micro farads by 16volts. if you want reset switch or may not as per your convenient.

Third step: In the microcontroller must high the 31st pin. if not do, your microcontroller will not work, hang or stop. It should be given to VCC (5V).

As we know four input and output ports are there, that is Port 0, Port 1, Port 2 and Port 3. Each port has 8-bit directional or unidirectional behave have. In these pins only we will edit in C code Keil software change pins or ports, such as LCD port (#define LCD P2) in header section.

2x16 LCD 8-bit Display Image-3

If you want particular pin then need to type as Sbit means single bit from 8-bit I/o. in the program have to mention as Sbit = P1^0; like this you want to mention in the Keil C code. First need to give header such as #include <Reg51.h> then start the program to store in Memory which is use as 

#include <Reg51.h>

#define LCD P2

Sbit LED0 = P1^0;

Sbit LED1 = P1^1;

Void main()

{

int i, j;

While (1)

for (i=0; i<=100; i++);

LED0 == 0;

delay (50);

for (j=0; j<=100; j++)

delay(50);

LED1 == 1;

}

return 0;

}

The above is sample Embedded C code for hobbyist or student people.

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