![]() ![]() It has two types of memory RAM and Flash memory (EEPROM), they have different sizes according to microcontroller like RAM is 256 Bytes and Flash is 8K for AT89S52. Among these 32 pins, two pins are for power supply and ground (pin 40 and 20), two pins to connect crystal oscillator (pin 18, 19), 3 pins to connect external memory (pin 29, 30, 31) and one pin for Reset function (Pin 9). These pins are used to input/output operation, some Pins have dual functions like timer, interrupts etc. It is a 40 Pin device, and has 4 ports, each port consists 8 pin, Means 4X8=32 pins. I am not going into detail of “What is 8051 microcontroller”, or “How to write a c-program” etc., but the scope of this article is to tell about the hardware and software which are needed to work with microcontroller and how to use them.īut before going into detail we can briefly summarize about 8051 microcontroller. ![]() ![]() If you are looking for a beginners guide on “ How to start with 8051 Microcontroller”, here in this article I will show you how to work with 8051 microcontroller practically. ![]()
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