| T O P I C R E V I E W |
| DJEsco |
Posted - 01/23/2009 : 10:53:13
I am sure most of you are aware of using SST27SF512 chips for Honda Eproms with an offset of 8000H.
And as most of you I use common programs for creating the 32 KB bin files which will be burned on to the chip.
The problem I am facing is that I want to be able to use the chips I burn for the application (Vehicle EPROM) but protect the content from being read by the original editing software or perhaps from being copied.
Help
djesco@hotmail.com (832)798-0000 |
| 3 L A T E S T R E P L I E S (Newest First) |
| ZLM |
Posted - 02/27/2009 : 14:29:31
All UV erasavle ROM are not protected, it should be read out easily from a EPROM programmer. |
| DJEsco |
Posted - 02/27/2009 : 11:46:53
Honda used OKI who made a propietary MCU like the 66207 used in the majority of OBD-I vehicles and the Pre OBD (OBD-0) MCUs using 83 C154 MCUs both of these are DIP 64 while the OBD-II systems using 66507 MCUs are PLCC68 based for all three you have to use a dumper to extract the data. and anyone who has a stock ECU with a Honda installed external rom will say "The ECU will read and use the external ROM (which is a UV erasable ROM) but cannot read it unless the rig up a dummper. |
| ZLM |
Posted - 01/24/2009 : 11:09:15
The reason for using SST27SF512 chips with an offset of 8000HB for Honda Eproms is a low cost solution of replacing AT29C256 flash chip.
But all EPROM/flash are the only storage devices, they are not protected from the reading. No way to do that form EPROM/Flash it self.
The only way to encrypt your data in the EPROM/flash is that you have to add another decryption chip. And it works together with the regular flash chip, such as 27SF512, 29C256 etc. Each decryption chip has a unique key and only user know the key.
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