AN2061 Datasheet, PDF (1/15 Pages) STMicroelectronics – External EEPROMs are often used in automotive applications

AN2061
APPLICATION NOTE
Description
EEPROM Emulation with ST10F2xx
External EEPROMs are often used in automotive applications to store adaptative/evolutive da-
ta. On the other hand, the Microcontroller used in those systems, are more and more based
on embedded-Flash.
The trend to continuously reduce the number of components is forcing designers to look to use
Flash memory to emulate EEPROM.
This application note will explain the differences between external EEPROMs and embedded-
Flash and will give advises on how to substitute external EEPROM to emulated-EEPROM us-
ing the on-chip Flash of ST10F2xx devices.
Although the concept is easy to explain and implement “as is”, there are some embedded as-
pects that have to be taken into account.
In this application note, the handling of embedded aspects to secure the content of an external
EEPROM are assumed to be known by the reader. So, this document is focusing on the dif-
ferences between EEPROMs and embedded-Flash.
September 2013
DocID10945 Rev 2
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