Appendix A: Glossary

The embedded ecosystem is full of different protocols, hardware components and vendor-specific things that use their own terms and abbreviations. This Glossary attempts to list them with pointers for understanding them better.

Term Meaning
I2C Sometimes referred to as I² C or Inter-IC. It is a protocol meant for hardware communication within a single integrated circuit. See for more details
SPI Serial Peripheral Interface
USART Universal synchronous and asynchronous receiver-transmitter
UART Universal asynchronous receiver-transmitter
FPU Floating-point Unit. A 'math processor' running only operations on floating-point numbers
PAC Peripheral Access Crate