mauricio fernandez montoya

HC08 project

Discussion created by mauricio fernandez montoya on Sep 22, 2007
Latest reply on Sep 26, 2007 by mauricio fernandez montoya
hi.  i need to create some kind of security device that open a door with a security code.   the basic algorithm is already done, but i have some troubles in one item: keep the value in the memory even without supply ( in other words, write on the flash memory)
the original idea is to write the code in  a vector, then that vector is compared with the vector with the corrct code.  if they are the same, the door opens.  easy.   to change the code is easy too, ( changing the vector ) but when you quit the uC supply,  the new data written in the  correct code dissapear!!! ( written in the uC ram).
anybody can help me??
thanks and sorry for mi english!!! :smileyhappy: