Engy Foda

MC9S12XE-Extended Memo.

Discussion created by Engy Foda on Aug 14, 2010
Latest reply on Sep 11, 2010 by kef

Dear all,

I'm making something similar to E-Dictionary for a foreign language

the size of the dictionary file is about 4MB.

I use MC9S12XEP100RMW 


1.how can I distribute or scatter that file over the memo. of the MCU, any suggestions please?

(note: what I understood from MCU data sheet that allowed extended memory is only 2.75MB.

But CPU has 8MB global, so I need to divide the file between the CPU memo and extended, please correct me if I'm wrong)


2.what is the IC no. of EEPROM that can give me max. available memo. space


3.would it work if I used a larger EEPROM (about 3 MB) as I'm not sure to find one of exact 2.75MB


4.Do I have to write method to convert from that language to HEX & vice versa, if yes then, I think I won't apply this on the file parts that would be saved on CPU, it would be applied only on the file parts saved on extended memo., right?


Any tutorials or code or step by step instructions about this topic would be highly appreciated, I'm completely lost in this area!!


waiting your replies,

Thanks in advance,