Thank you for your response igor.
I have refereed the same user guide (section 4.3)for preparing bootable SD card.
We have downloaded the prebuild images of i.MX6 sololite from the dowloads of NXP, now we want these images to be burnt on the sd card without using MFG tool as it requires the images to be compiled with MFG flags.
After following the steps in the section 4.3, we prepared the SD card but the U-boot does not seem to get boot up.
Is there any direct script to partition the SD card with proper size and download the Linux images one by one on the particular partition?