title: I2C Address format
body: <p>I'm working on writing/reading data across i2c to the USB to i2c board <a href="http://www.ftdichip.com/Products/ICs/FT201X.html" rel="nofollow">UMFT201</a>. The data sheet says the default i2c address is "22h". I can't figure out what that means. When I use the general call address it seems to be able to write data to the board; so I think my code is working. I'm new to C programming; thus not sure what that "22h" means.</p>