TFT LCD Font

hi everybody,

i had TFT LCD Module LMT035DNAFWU-NAA, and when I was looking on the datasheet of that module I found that I can use external ROM for font data (for custom font).

So my question is : first how can I put my font data in that external ROM?
Second how can I use it later?((like internal GB,BIG,ASCII))..



this is the datasheet
http://www.topwaydisplay.com/Pub/Manual/LMT035DNAFWU-NAA-Manual-Rev0.3.pdf


Please, help me
Thanks in advance..