In this research work, we have focused on designing an energy efficient Sindhi Unicode reader based on LVCMOS for natural processing. Unicode is a standard for a universal character set for all the scripts of the world. It is one of the fundamental technological building blocks for exchanging textual information internationally, via computers. The scripts of Sindh are Brahmi-based writing systems. Our main aim of this paper is to build an energy efficient low power design for this we have taken different frequencies and calculated its power. We have done power analysis on a constant temperature that is 25 degree Celsius and also keeping air flow constant. We have varied frequency and calculated power for different LVCMOS IO STANDARDs. Our design is based on 28nm FPGA and the code has been tested on Kintex-7 and the device used is XC7K160T, package used is FBG676 and it is working on -3 speed grade. At the end we have concluded that there is 3.27%, 3.38%, 4.34%, 3.12%, 4.54%, 4.28% saving in power dissipation with LVCMOS18 and LVCMOS15 when compared with LVCMOS33 at 1400 MHz, 1.2 GHz, 2100 MHz, 1700 MHz, 1800MHz, 2.2 GHz respectively. © 2015 SERSC.