FLASH and EEPROM

[bogdanfirst]

for a PIC16F84 i see that it has a Flash and an EEPROM memory. what is each used for?
the Flash sais that it is 1000 erasable and the EEPROM is 10000000 times erasable....

 

[kinjalgp]

Flash memory is used for Program Memory of the microcontroller where as EEPROM is used for non-volatile data storage.
Flash memory cells are cheaper to construct than EEPROM cells. I think this is the reason why they give FLASH for Program memory and EEPROM fro data storage.

 

[bogdanfirst]

so in conclusion the FLASH is where the program is stored and the EEPROM is where the data that is used when the program is running is sotred?

 

[kinjalgp]

No not necessary. Onle recent uCs come with this configuration. But if you want you can also interface an external EEPROM as program memory for uC like 8051 and even a FLASH ROM as data storage memory. So both ways it is possible.