Cycles in Eeprom

[electron67]

Hello, Would appreciate help or any suggestions

One question, I select a value using a keypad and save it in Pic's eeprom memory, but the eeprom memory has a life time, I think from 1 million to 3 million read / write cycles.
What other option could be done to avoid harming Pic? (read only once the value recorded in memory) or some other option

Thanks
Enrique

[Steve001]

Hi Enrique

This post might be helpful

viewtopic.php?f=7&t=18493

Steve

[medelec35]

You could even consider saving eeprom on power failure.
Take a look at this whole topic as there is talk on how its done.
Another way is only write to EEPROM on variable change only.
Don't constantly read or write to EEPROM.

[electron67]

Hello, Martin and Steve

Thanks a lot for the data. I appreciate the help

Enrique

[electron67]

Hi Martin

Excellent work, I can read only once the data in the eeprom together with DisableDataSend = 1 in long times if the DisableDataSend = 0 is lost it also means that the data of the eeprom 'M' was lost and re-read in the eeprom.

When you read a data from the eeprom, you know how long time the data is retained in a variable?. . .Hours, minutes, days?

Steve thank You, is another option I will also do the test with the example you gave me.

Thanks
Enrique

[Benj]

Hello Enrique,

When you read a data from the eeprom, you know how long time the data is retained in a variable?. . .Hours, minutes, days?

A value stored in to RAM should be retained as long as the device remains sufficiently powered. So ideally Years is the answer.

Most chips will feature some sort of a brown out mechanism so that the chip will reset if the power supply becomes too low or unstable which may lead to RAM corruption. The brown out should happen well before any RAM corruption happens.

[electron67]

Thanks Benj

I not had idea how long could retain the data

Enrique