Electrolux Washer Service Manual page 33

The overall structure of the microprocessor memory on the main PCB is subdivided into three sections:
ROM This area of memory contains the software with the general instructions that control the operation
of the appliance, such as those of the electrical components and alarms. The ROM is set up by
the manufacturer of the microprocessor, and cannot be modified.
RAM This part of memory contains all the variables used during the execution of the wash programme,
which are written in dynamic format. The RAM can be read using a DAAS interface.
EEPROM This area of memory contains:
⇒ the data necessary to restart the appliance in case of a power failure.
⇒ the parameters for the wash cycle, such as water fill level, speed and type of motor movement,
and the temperature during the various phases of the wash cycle. Once written, this data is
protected and, normally, can be read only using a DAAS interface.
⇒ data relative to the configuration of the appliance, such as the speed of the final spin phase,
the volume of the tub, the type of washing system, etc. This data may be entered either via a
DAAS interface or via the control/display board.
SOI/DT 2004-07 dmm
33/65
599 36 54-15