Hello friends, in this tutorial we are going to interface LCD with 8051 microcontroller but in 4 bit mode. we already interfaced LCD with 8051 in 8 bit and also done scrolling of text in previous tutorials.
In this 8051 microcontroller tutorial we discuss JUMP and CALL instructions. In previous tutorials we learn about MOV and ADD instruction and how to use them with registers as well as memory locations. but some time you need to take decision between two state or you need to jump some of code, or may be you need to call a subroutine(function). In that case you need some special instruction which make our task very simple and