Thanks for the message. I replied to your question on Github, but I wanted to reply here for completeness. Essentially, the framerate register sets the maximum allowable framerate for the sensor. By default, the sensor scans as fast as possible (value defaults to 2000 Hz). For an Arduino application, you can set the max framerate value lower so that you don't get overwhelmed with touch data. The default scan resolution scans around 125-250Hz.