EEPROM (Electrically Programmable Read Only Memory)
An EEPROM is a computer memory chip that can be electrically programmed and electrically erased, thereby not requiring the chip to be removed from the module or exposed to light. In general this chip is not easily removable from the device it is installed into (it is usually soldered in its place.
Since the entire process of programming and erasing is done electronically this device is commonly referred to as "Flash Programmable" .
During the programming process the following type of information may be loaded into the control module depending on the specific application or update that needs to be installed:
- Characteristic Maps (Ex. Ignition, Injection, Purge Control, DSC Regulation, ...)
- Control Constants/ Operational Data
- Operational Program
- Control Module Identification Information (Ex. Hardware Number, Program Number, Date of Modification, ...)
At this moment, modules with EEPROMS can only be flash programmed ("flashed") , can only 14 times total. If the module has to be programmed a 15th time, it has to be replaced.