| ADC | Analog-to-Digital Converter |
| AREF | Analog Reference Voltage |
| CPU | Central Processing Unit |
| DC | Direct Current |
| DIP | Dual In-line Package |
| EEPROM or E2PROM | Electrically Erasable Programmable Read-Only Memory |
| EMC | Electromagnetic Compatibility |
| ESD | Electrostatic Discharge |
| GND | Ground |
| HVPP | High-Voltage/Parallel Programming |
| Hz | Hertz |
| I/O | Input and Output |
| IDE | Integrated Development Environment |
| ISP | In-System Programming |
| kHz | KiloHertz |
| LED | Light Emitting Diode |
| MCU | Microcontroller Unit |
| MHz | MegaHertz |
| MISO | Master In Slave Out |
| MOSI | Master Out Slave In |
| PCB | Printed Circuit Board |
| PDI | Program and Debug Interface |
| RC Filter | Resistor-Capacitor Filter |
| RST | Reset |
| SPI | Serial Peripheral Interface |
| TPI | Tiny Programming Interface |
| UPDI | Unified Program and Debug Interface |
| VCC | Supply Voltage |
| XTAL | Crystal Oscillator |