On 6/10/2012 9:01 PM, V G wrote: > In terms of other people downloading your code, if they wanted to do=20 > that, they would find a way regardless of where it is stored. I think=20 > your best bet for protection is some kind of encryption.=20 Some of the FPGA have security features, like the one I am using that=20 loads its code from sdcards. The FPGA has an internal module that=20 handles all encryption/decryption and the user only has to set the key=20 one time, the key is stored internally in the FPGA and is not=20 retrievable, lose your key and you can never use the chip again. Mark --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .