AN2440 Datasheet, PDF (1/13 Pages) STMicroelectronics – The Error Code Correction

AN2440
Application note
Embedded ECC in F8H process automotive EEPROM:
device architecture and related application guidelines
Introduction
The Error Code Correction (ECC) is a specific logic, embedded in certain EEPROM devices,
which can correct a single bit error when reading a binary word.
This embedded ECC algorithm is transparent for the Master bus and increases the data
read robustness. However, when comparing an EEPROM device with an ECC to an
EEPROM without an ECC, the two devices behave differently in some very specific cases.
The purpose of this application note is to describe the ST EEPROM ECC architecture in
order to understand the possible differences in certain specific user cases.
This application note applies to the automotive F8H process products listed in Table 1.
Table 1.
Type
F8H process automotive products
Part numbers
Memories
Automotive
products
SPI bus
products
I²C bus
products
M95320-A125/A145,
M95640-A125/A145,
M95128-A125/A145,
M95256-A125/A145,
M95512-A125/A145,
M95M01-A125/A145.
M24128-A125,
M24256-A125,
M24512-A125,
M24C64-A125,
M24C32-A125,
M24M01-A125.
January 2013
Doc ID 023074 Rev 4
1/13
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