![]() ![]() The tuning tool supports a few EEPROM emulators, all of which use a serial protocol. The OKI 66207 also uses an UART to send logging information. The OKI 66207 reads the firmware from a 27C256 EEPROM (32kByte). ![]() Technical details: The Honda ECU uses an OKI 66207 microcontroller running at 10MHz. So please do not comment I can just buy something of the shelve: this project is for educational/entertainment purpose. I was thinking of building my own EEPROM emulator, because I want to refresh my PCB / SW / HW knowledge a bit. You can buy the Moates Demon/Ostrich or the Hondata S300, but these cost well over 200$. To solve this there are quite a few EEPROM emulators which allow live updates to the emulated EEPROM for a PC. This is a cumbersome process as with every change you need to stop the car and update the EEPROM. Recently I have been tuning a Honda car with an EEPROM burner.
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