Adaptation of the MEEPROMMER project for larger memories.

The code as it currently stands was last modified in 2014-08-05 and isn't very well documented, since it was intended for my personal use only. This project currently supports only the AT29C040A Atmel 4MBit Flash chip, but it could be modified to support similar parallel (E)EPROMs.

• Mario Keller for the original MEEPROMMER - https://github.com/mkeller0815/MEEPROMMER
• Tiido Primagi for insight on writing to the AT29C040A chip - http://www.tmeeco.eu/

To achieve a greater number of control outputs from a standard Arduino UNO's digital pins, I use a common 8-bit "bus" (pins 2-9) for both data and address, wired directly to the input of 3 Octal D-Latch flip-flops (74HC574 or similar) and the I/O pins of the EEPROM at the same time. The outputs of the flip-flops go to the address pins of the EEPROM and the enable pins of the flip-flops go to pins 10-12 on the Arduino. Pins WE, OE and CE of the EEPROM go to analog pins 0, 1 and 2 respectively.

The Python tool is derived from the one found in the MEEPROMMER project and has only been slightly modified to account for the changes in the new Arduino code, but it is by no means polished. The usage should be similar that of the original tool, only note that when writing to the AT29C040A chip you must always do so in 256-byte pages.