Expanding Fignition; Circuit Diagram; Operation - FIGnition FUZE Hardware Reference Manual

9. Expanding FIGnition

FIGnition FUZE provides a full set of Arduino headers for expansion and the spacing be-
tween the each header row has a 0.2" gap to make it easier to interface to stripboard.
There are significant limitations Arduino compatibility, because many pins are already as-
signed to built-in functions. However, FIGnition supports I2C and (with limitations) SPI de-
vices which can be chained to two different busses.

9.1 Circuit Diagram

Fig 9.1

9.2 Operation

Arduino headers are mostly signals taken straight from an AVR microcontroller arranged
largely according to the AVR's pinout. On an arduino the run-time library provides functions
to read and write individual port D and B pins (digitalRead() and digitalWrite())