Category Archives: microcontroller
The pin labeling is in the user guide, but the connector numbering was ambiguous. This photo and table snippet from the user guide shows the pinout. Click to enlarge.
The ATmega32u2 doesn’t have a two-wire interface (as far as I can tell) or I2C, so this method was used to have an I2C bus. The circuit shows the SCL line, and the same circuit is duplicated for the SDA … Continue reading