View source for PIC18F4520 EEPROM ← PIC18F4520 EEPROM

[[Category:Starter PIC18F4520]]

In this tutorial we will discuss how to access the PIC18F4520 internal EEPROM memory to store and retrieve the data. Eeprom is basically used to store the non volatile data which is required to be stored even if there is power loss or controller resets.
[[FILE:Pic16f877a_Eeprom.png]]

=PIC18F4520 Memories=
PIC18F4520 comes with three memories Flash,RAM and EEPROM. Below table shows the memory capacity of PIC18F4520:
{| class="table table-striped table-hover table-condensed table-bordered"
|-class="info"
!Memory|| Size || Description
|-
|FLASH || 8k-bytes || Used to store the programs
|-
|RAM|| 368-bytes || Temporary/ScratchPad memory used  during program execution.
|-
|EEPROM|| 256-bytes || Used to store the non-volatile data across power cycles
|}
<br><br>

=Prerequisites=
Please check [[PIC Internal Eeprom|this tutorial]] for detailed explanation on PIC16F877A Internal Eeprom.<br><br>

=Code=
Below is the program to write the data(A-Z) to eeprom and then read it back.
<html>
<script src="https://gist.github.com/SaheblalBagwan/b1087ae6b897c9815e0d59f410039ae1.js"></script>
</html>

[[FILE:Pic16f877a_EepromOutput.png]]