Recently I had to extract a firmware from an I2C EEPROM.

Although I am pretty used to SPI EEPROM on embedded equipments, seeing an I2C bus seemed pretty unusual to me.

As you may have noticed from my previous posts, I make heavily use of my GoodFET. It is a very handy tool and although I also have a BusPirate v4, I prefer Travis’s tool. Unfortunately, I2C protocol is not compiled by default on the firmware, the tools are marked as “untested” on the website and the pinout is not documented on the website. That’s a lot of things to find out :-)