AT89C51 flash as eeprom?

Discussion in 'Embedded Systems and Microcontrollers' started by aamirali, Sep 22, 2014.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    I have code written for AT89C51 with 2K code & 50 bytes RAM.
    I also need some 10 bytes as eeprom.

    Can I use AT89C51 flash as eeprom as I have rest 2K flash empty otherwise I have to add extra external eeprom.
  2. elabsp

    New Member

    Oct 23, 2013
    I donot think that you can use AT89c51 flash eeprom as extra EEPROm you can use AT24cXX eeprom for saving RUN time data

    The reason is, in AT89c51 eeprom you cannot program it while in running mode... so better to use external eeprom AT93cxx or AT24cXX