Little Endian ->LSB at lower address
Big Endian -> MSB at lower address
e.g:
    if the value is 0x0A0B0C0D then
in case of LE storage will be
Address 1000 0D
Address 1001 0C
Address 1002 0B
Address 1003 0A

in case of BE storage will be
Address 1000 0A
Address 1001 0B
Address 1002 0C
Address 1003 0D

Marco to convert(this will convert from LE to BE or BE to 
LE--> one for all :) )

#define CON(NUM) (NUM&0x000000FF)<<24|(NUM&0x0000FF00)<<8 
|NUM&0x00FF0000)>>8 |(NUM&0xFF000000)>>24