eeprom

n the ECU’s main microcontroller package. In some cases, external modules or transponder chips may contain EEPROM data linked to the immobilizer system. Reading and Writing EEPROM Data To manage EEPROM data, technicians employ specialized tools: EPROM/EEPROM programmers:

PROM The EEPROM is typically a small, non-volatile memory chip embedded on the BSI circuit board. It is designed to retain data even when power is disconnected. In Peugeot Valeo BSI units, common EEPROM chips include manufacturers such as Microchip (e.g., 93Cxx series), STMicroelectronics, or Atm