What is surprising to me that everyone calls it EEPROM here while it is 'normal' SPI flash chip.EEPROMS are considered to have a finite life though precisely how long is a rather 'fuzzy' issue
According to this post the 'EEPROM' chip on Pi4 is Winbond W25X40CLUXIG and you won't find EEPROM word anywhere in its datasheet https://eu.mouser.com/datasheet/2/949/w ... 489812.pdf
And BTW the limits are there - More than 100,000 erase/write cycles – More than 20-year data retention.
Maybe it is British or generational thing to call it EEPROM? Anyway, it does not matter, I just find it slightly odd to see EEPROM word used so much here. I was used to understand this term as something smaller that stores data not code and could erase individual bytes.
Wikipedia says this on the subject of EEPROM vs flash memory
Flash memory is a type of EEPROM designed for high speed and high density, at the expense of large erase blocks (typically 512 bytes or larger) and limited number of write cycles (often 10,000). There is no clear boundary dividing the two, but the term "EEPROM" is generally used to describe non-volatile memory with small erase blocks (as small as one byte) and a long lifetime (typically 1,000,000 cycles). Many past microcontrollers included both (flash memory for the firmware and a small EEPROM for parameters), though the trend with modern microcontrollers is to emulate EEPROM using flash.
Statistics: Posted by fanoush — Thu Feb 22, 2024 1:08 pm