SST 27SF512 Can I read/save the data from this VTEC Ecu?

Thomas

Well-known member

Donor 2021
Joined
Jan 23, 2009
Messages
3,726
Reaction score
75
Location
Virginia
SST 27SF512 Can I read/save the data from this VTEC Ecu?

I have this VTEC ECU that has a removable chip (SST 27SF512). Can I replace this chip with an eprom?
 
It is an eprom ! Well.. ok.. actually it's an eeprom. You should be able to read it and dump the contents with most any programmer. Check your programmers supported device list to see if you can erase and program it (erasing is the odd bit and not supported by all programmers).

You *might* be able to sub a 27C512, would have to compare some data sheets to find out for sure.

There are many VTEC and tuner websites around, you can probably find some more specific, and detailed, information on what it is you are looking to do.
 
You'll probably need another EEPROM. Many different ECUs store data on that chip in special locations. Honda is bad about permanently storing data from an engine overrev so they can void your warranty if you drop a valve into the engine afterwards.

RJ
 
yeah, usually there is a bank of "FF" data (erased), and they write 0' to different bit locations for different flags. (similar to fuses)

most ECU's these days can run from ram as well, so they can actually copy a portion of EEPROM code to RAM, and then jump to processing in ram, and issue standard write procedures to flash/eeprom.
 
Back
Top Bottom