[AVR] Flash memory life time

[Dinuwilson]

When i check all micro controller's EEPROM. they are saying maximum 1000 write/erase cycles.

This 1000 write/erase cycles we can understand. but my doubt is on what basis they are saying this. is ti related with ic fabrication?

How ROM is working. in ROM memory they are not saying any read/write cycles....why?

Please help me to solve my doubt......

 

[udayan92]

This 1000 write/erase cycles we can understand. but my doubt is on what basis they are saying this. is ti related with ic fabrication?

It is EEPROM,that is,by applying a voltage you can read/write in it.Now,depending upon the technology used to manufacture the EEPROM,there is a limit on how much times you can perform read/write operations in it before it loses the capacity to store memory.
In ROM,once you burn it,it is fixed.Permanent.You cannot change it.

 

[Dinuwilson]

Thank's for your replay..in SRAM how it's work

 

[udayan92]

in SRAM how it's work

I do not understand....could you elaborate on that?

 

[wp100]

When i check all micro controller's EEPROM. they are saying maximum 1000 write/erase cycles.

This 1000 write/erase cycles we can understand. but my doubt is on what basis they are saying this. is ti related with ic fabrication?

How ROM is working. in ROM memory they are not saying any read/write cycles....why?

Please help me to solve my doubt......

Hi,

Do not know what 'AVR' device you are referring to but typical AVR or PIC micros have a EEPROM at least 100,000 r/w cycles

AVR EEPROM chips seem to have about 1,000,000 r/w cycles.

To understand the different types of micro memory these links might help you.. there are many others on the web that explain things in more detail if you search.
http://www.avr-tutorials.com/general/avr-memory-map
**broken link removed**