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.

TermMeaning
I2CSometimes referred to as I² C or Inter-IC. It is a protocol meant for hardware communication within a single integrated circuit. See i2c.info for more details
SPISerial Peripheral Interface
USARTUniversal synchronous and asynchronous receiver-transmitter
UARTUniversal asynchronous receiver-transmitter
FPUFloating-point Unit. A 'math processor' running only operations on floating-point numbers
PACPeripheral Access Crate