3.9. Expansion areas
The top expansion areas on the Zumo 32U4 main board (in two 2×13 groups of pins near the left and right edges) break out all of the ATmega32U4 microcontroller’s general-purpose I/O lines and provide access to various power inputs and outputs. Some of these pins are also broken out in the front expansion area, where the front sensor array connects. The following diagrams identify the locations of these pins and the hardware associated with them.
Zumo 32U4 top expansion pinout.
Zumo 32U4 front expansion and LCD connector pinout.
These diagrams are also available as a printable PDF (536k pdf). For more information about the ATmega32U4 microcontroller and its peripherals, see Atmel’s ATmega32U4 documentation.